./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/MultCommutative-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_90634d00-9885-49e9-b181-180be15f8796/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_90634d00-9885-49e9-b181-180be15f8796/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_90634d00-9885-49e9-b181-180be15f8796/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_90634d00-9885-49e9-b181-180be15f8796/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/MultCommutative-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_90634d00-9885-49e9-b181-180be15f8796/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_90634d00-9885-49e9-b181-180be15f8796/bin/utaipan --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 f536dfaa325c5623e8e0c5d03d4d9d96bd998e26 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-7b2dab5 [2020-12-03 12:36:20,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:36:20,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:36:20,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:36:20,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:36:20,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:36:20,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:36:20,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:36:20,343 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:36:20,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:36:20,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:36:20,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:36:20,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:36:20,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:36:20,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:36:20,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:36:20,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:36:20,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:36:20,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:36:20,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:36:20,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:36:20,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:36:20,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:36:20,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:36:20,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:36:20,372 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:36:20,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:36:20,374 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:36:20,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:36:20,376 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:36:20,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:36:20,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:36:20,378 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:36:20,379 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:36:20,380 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:36:20,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:36:20,381 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:36:20,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:36:20,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:36:20,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:36:20,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:36:20,385 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_90634d00-9885-49e9-b181-180be15f8796/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-12-03 12:36:20,410 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:36:20,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:36:20,411 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:36:20,411 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:36:20,412 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:36:20,412 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:36:20,412 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:36:20,412 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:36:20,413 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:36:20,413 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:36:20,413 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:36:20,413 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:36:20,414 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:36:20,414 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:36:20,414 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:36:20,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:36:20,415 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-03 12:36:20,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:36:20,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:36:20,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 12:36:20,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:36:20,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 12:36:20,416 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-03 12:36:20,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 12:36:20,417 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:36:20,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 12:36:20,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:36:20,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:36:20,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:36:20,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:36:20,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:36:20,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 12:36:20,419 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:36:20,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:36:20,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 12:36:20,420 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:36:20,420 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:36:20,420 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-vcloud-master/worker/run_dir_90634d00-9885-49e9-b181-180be15f8796/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_90634d00-9885-49e9-b181-180be15f8796/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f536dfaa325c5623e8e0c5d03d4d9d96bd998e26 [2020-12-03 12:36:20,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:36:20,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:36:20,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:36:20,712 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:36:20,713 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:36:20,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_90634d00-9885-49e9-b181-180be15f8796/bin/utaipan/../../sv-benchmarks/c/termination-numeric/MultCommutative-1.c [2020-12-03 12:36:20,818 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_90634d00-9885-49e9-b181-180be15f8796/bin/utaipan/data/0d8b0edb2/96c8b2184e9d4eb4be54bdf1356e1580/FLAG72abe5571 [2020-12-03 12:36:21,370 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:36:21,370 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_90634d00-9885-49e9-b181-180be15f8796/sv-benchmarks/c/termination-numeric/MultCommutative-1.c [2020-12-03 12:36:21,379 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_90634d00-9885-49e9-b181-180be15f8796/bin/utaipan/data/0d8b0edb2/96c8b2184e9d4eb4be54bdf1356e1580/FLAG72abe5571 [2020-12-03 12:36:21,744 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_90634d00-9885-49e9-b181-180be15f8796/bin/utaipan/data/0d8b0edb2/96c8b2184e9d4eb4be54bdf1356e1580 [2020-12-03 12:36:21,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:36:21,749 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:36:21,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:36:21,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:36:21,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:36:21,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:36:21" (1/1) ... [2020-12-03 12:36:21,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3234dede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:21, skipping insertion in model container [2020-12-03 12:36:21,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:36:21" (1/1) ... [2020-12-03 12:36:21,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:36:21,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:36:21,956 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_90634d00-9885-49e9-b181-180be15f8796/sv-benchmarks/c/termination-numeric/MultCommutative-1.c[1008,1021] [2020-12-03 12:36:21,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:36:21,972 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:36:21,997 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_90634d00-9885-49e9-b181-180be15f8796/sv-benchmarks/c/termination-numeric/MultCommutative-1.c[1008,1021] [2020-12-03 12:36:22,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:36:22,019 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:36:22,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22 WrapperNode [2020-12-03 12:36:22,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:36:22,023 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:36:22,024 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:36:22,024 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:36:22,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22" (1/1) ... [2020-12-03 12:36:22,040 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22" (1/1) ... [2020-12-03 12:36:22,057 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:36:22,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:36:22,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:36:22,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:36:22,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22" (1/1) ... [2020-12-03 12:36:22,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22" (1/1) ... [2020-12-03 12:36:22,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22" (1/1) ... [2020-12-03 12:36:22,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22" (1/1) ... [2020-12-03 12:36:22,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22" (1/1) ... [2020-12-03 12:36:22,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22" (1/1) ... [2020-12-03 12:36:22,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22" (1/1) ... [2020-12-03 12:36:22,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:36:22,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:36:22,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:36:22,100 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:36:22,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_90634d00-9885-49e9-b181-180be15f8796/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:36:22,197 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-12-03 12:36:22,197 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-12-03 12:36:22,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:36:22,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:36:22,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-03 12:36:22,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 12:36:22,492 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:36:22,492 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-03 12:36:22,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:36:22 BoogieIcfgContainer [2020-12-03 12:36:22,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:36:22,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:36:22,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:36:22,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:36:22,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:36:21" (1/3) ... [2020-12-03 12:36:22,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593af30d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:36:22, skipping insertion in model container [2020-12-03 12:36:22,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:22" (2/3) ... [2020-12-03 12:36:22,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593af30d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:36:22, skipping insertion in model container [2020-12-03 12:36:22,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:36:22" (3/3) ... [2020-12-03 12:36:22,503 INFO L111 eAbstractionObserver]: Analyzing ICFG MultCommutative-1.c [2020-12-03 12:36:22,516 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:36:22,534 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-03 12:36:22,545 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-03 12:36:22,571 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:36:22,571 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 12:36:22,571 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:36:22,571 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:36:22,571 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:36:22,572 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:36:22,572 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:36:22,572 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:36:22,588 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-03 12:36:22,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-03 12:36:22,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:22,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:22,594 INFO L429 AbstractCegarLoop]: === Iteration 1 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:36:22,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:22,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1027513993, now seen corresponding path program 1 times [2020-12-03 12:36:22,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:22,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058936071] [2020-12-03 12:36:22,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:22,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:22,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058936071] [2020-12-03 12:36:22,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:36:22,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:36:22,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862212375] [2020-12-03 12:36:22,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:36:22,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:22,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:36:22,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:36:22,808 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-12-03 12:36:23,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:23,040 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2020-12-03 12:36:23,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:36:23,042 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-03 12:36:23,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:23,052 INFO L225 Difference]: With dead ends: 73 [2020-12-03 12:36:23,053 INFO L226 Difference]: Without dead ends: 42 [2020-12-03 12:36:23,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:36:23,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-03 12:36:23,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-12-03 12:36:23,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-03 12:36:23,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-12-03 12:36:23,129 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 7 [2020-12-03 12:36:23,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:23,130 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-12-03 12:36:23,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:36:23,131 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-12-03 12:36:23,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 12:36:23,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:23,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:23,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:36:23,134 INFO L429 AbstractCegarLoop]: === Iteration 2 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:36:23,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:23,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1788169763, now seen corresponding path program 1 times [2020-12-03 12:36:23,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:23,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868480778] [2020-12-03 12:36:23,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:23,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868480778] [2020-12-03 12:36:23,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:36:23,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:36:23,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179335046] [2020-12-03 12:36:23,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:36:23,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:23,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:36:23,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:36:23,253 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 5 states. [2020-12-03 12:36:23,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:23,345 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2020-12-03 12:36:23,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:36:23,346 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-03 12:36:23,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:23,348 INFO L225 Difference]: With dead ends: 58 [2020-12-03 12:36:23,348 INFO L226 Difference]: Without dead ends: 56 [2020-12-03 12:36:23,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:36:23,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-03 12:36:23,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-12-03 12:36:23,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-03 12:36:23,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2020-12-03 12:36:23,360 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 8 [2020-12-03 12:36:23,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:23,361 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2020-12-03 12:36:23,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:36:23,361 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2020-12-03 12:36:23,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-03 12:36:23,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:23,362 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:23,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 12:36:23,362 INFO L429 AbstractCegarLoop]: === Iteration 3 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:36:23,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:23,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1125158968, now seen corresponding path program 1 times [2020-12-03 12:36:23,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:23,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319716613] [2020-12-03 12:36:23,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:23,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319716613] [2020-12-03 12:36:23,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:36:23,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:36:23,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669519408] [2020-12-03 12:36:23,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:36:23,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:23,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:36:23,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:36:23,439 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 5 states. [2020-12-03 12:36:23,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:23,562 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2020-12-03 12:36:23,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:36:23,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-03 12:36:23,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:23,564 INFO L225 Difference]: With dead ends: 76 [2020-12-03 12:36:23,565 INFO L226 Difference]: Without dead ends: 75 [2020-12-03 12:36:23,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-03 12:36:23,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-03 12:36:23,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2020-12-03 12:36:23,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-03 12:36:23,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2020-12-03 12:36:23,582 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 13 [2020-12-03 12:36:23,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:23,582 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2020-12-03 12:36:23,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:36:23,583 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2020-12-03 12:36:23,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-03 12:36:23,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:23,584 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:23,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-03 12:36:23,584 INFO L429 AbstractCegarLoop]: === Iteration 4 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:36:23,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:23,585 INFO L82 PathProgramCache]: Analyzing trace with hash -691954174, now seen corresponding path program 1 times [2020-12-03 12:36:23,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:23,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582037126] [2020-12-03 12:36:23,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:23,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582037126] [2020-12-03 12:36:23,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:36:23,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:36:23,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100047905] [2020-12-03 12:36:23,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:36:23,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:23,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:36:23,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:36:23,684 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand 5 states. [2020-12-03 12:36:23,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:23,754 INFO L93 Difference]: Finished difference Result 120 states and 154 transitions. [2020-12-03 12:36:23,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:36:23,755 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-03 12:36:23,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:23,758 INFO L225 Difference]: With dead ends: 120 [2020-12-03 12:36:23,758 INFO L226 Difference]: Without dead ends: 84 [2020-12-03 12:36:23,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:36:23,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-03 12:36:23,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2020-12-03 12:36:23,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-03 12:36:23,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2020-12-03 12:36:23,775 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 14 [2020-12-03 12:36:23,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:23,776 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2020-12-03 12:36:23,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:36:23,776 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2020-12-03 12:36:23,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-03 12:36:23,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:23,777 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:23,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-03 12:36:23,777 INFO L429 AbstractCegarLoop]: === Iteration 5 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:36:23,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:23,778 INFO L82 PathProgramCache]: Analyzing trace with hash 24264138, now seen corresponding path program 1 times [2020-12-03 12:36:23,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:23,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161522952] [2020-12-03 12:36:23,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:23,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161522952] [2020-12-03 12:36:23,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:36:23,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:36:23,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280995262] [2020-12-03 12:36:23,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:36:23,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:23,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:36:23,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:36:23,826 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand 5 states. [2020-12-03 12:36:23,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:23,897 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2020-12-03 12:36:23,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:36:23,898 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-03 12:36:23,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:23,900 INFO L225 Difference]: With dead ends: 101 [2020-12-03 12:36:23,900 INFO L226 Difference]: Without dead ends: 100 [2020-12-03 12:36:23,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:36:23,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-03 12:36:23,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2020-12-03 12:36:23,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-03 12:36:23,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2020-12-03 12:36:23,917 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 15 [2020-12-03 12:36:23,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:23,917 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2020-12-03 12:36:23,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:36:23,917 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2020-12-03 12:36:23,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-03 12:36:23,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:23,918 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:23,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-03 12:36:23,919 INFO L429 AbstractCegarLoop]: === Iteration 6 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:36:23,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:23,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1116235770, now seen corresponding path program 1 times [2020-12-03 12:36:23,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:23,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303995212] [2020-12-03 12:36:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:36:23,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303995212] [2020-12-03 12:36:23,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:36:23,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-03 12:36:23,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467083083] [2020-12-03 12:36:23,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:36:23,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:23,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:36:23,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:36:23,987 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand 5 states. [2020-12-03 12:36:24,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:24,058 INFO L93 Difference]: Finished difference Result 132 states and 168 transitions. [2020-12-03 12:36:24,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 12:36:24,061 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-03 12:36:24,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:24,063 INFO L225 Difference]: With dead ends: 132 [2020-12-03 12:36:24,064 INFO L226 Difference]: Without dead ends: 58 [2020-12-03 12:36:24,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-03 12:36:24,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-03 12:36:24,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2020-12-03 12:36:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-03 12:36:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-12-03 12:36:24,095 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 18 [2020-12-03 12:36:24,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:24,095 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-12-03 12:36:24,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:36:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-12-03 12:36:24,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-03 12:36:24,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:24,097 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:24,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-03 12:36:24,097 INFO L429 AbstractCegarLoop]: === Iteration 7 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:36:24,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:24,098 INFO L82 PathProgramCache]: Analyzing trace with hash 937076250, now seen corresponding path program 1 times [2020-12-03 12:36:24,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:24,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56195039] [2020-12-03 12:36:24,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:24,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56195039] [2020-12-03 12:36:24,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183652562] [2020-12-03 12:36:24,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_90634d00-9885-49e9-b181-180be15f8796/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:24,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-03 12:36:24,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:24,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:24,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [836418325] [2020-12-03 12:36:24,520 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-12-03 12:36:24,520 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:24,525 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-03 12:36:24,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:24,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2020-12-03 12:36:24,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616820953] [2020-12-03 12:36:24,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-03 12:36:24,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:24,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-03 12:36:24,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-03 12:36:24,540 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 10 states. [2020-12-03 12:36:24,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:24,673 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2020-12-03 12:36:24,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-03 12:36:24,674 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-12-03 12:36:24,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:24,676 INFO L225 Difference]: With dead ends: 66 [2020-12-03 12:36:24,676 INFO L226 Difference]: Without dead ends: 65 [2020-12-03 12:36:24,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-12-03 12:36:24,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-03 12:36:24,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2020-12-03 12:36:24,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-03 12:36:24,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-12-03 12:36:24,685 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 17 [2020-12-03 12:36:24,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:24,685 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-12-03 12:36:24,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-03 12:36:24,686 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2020-12-03 12:36:24,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-03 12:36:24,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:24,687 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:24,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-03 12:36:24,904 INFO L429 AbstractCegarLoop]: === Iteration 8 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:36:24,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:24,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1015407268, now seen corresponding path program 1 times [2020-12-03 12:36:24,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:24,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878143523] [2020-12-03 12:36:24,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:24,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878143523] [2020-12-03 12:36:24,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488786547] [2020-12-03 12:36:24,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_90634d00-9885-49e9-b181-180be15f8796/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:25,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 12:36:25,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:25,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:25,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1532484727] [2020-12-03 12:36:25,130 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-12-03 12:36:25,130 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:25,131 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-03 12:36:25,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:25,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2020-12-03 12:36:25,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850822216] [2020-12-03 12:36:25,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-03 12:36:25,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:25,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-03 12:36:25,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-03 12:36:25,134 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand 9 states. [2020-12-03 12:36:25,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:25,266 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-12-03 12:36:25,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-03 12:36:25,268 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-12-03 12:36:25,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:25,269 INFO L225 Difference]: With dead ends: 64 [2020-12-03 12:36:25,270 INFO L226 Difference]: Without dead ends: 63 [2020-12-03 12:36:25,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-12-03 12:36:25,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-03 12:36:25,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2020-12-03 12:36:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-03 12:36:25,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-12-03 12:36:25,291 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 18 [2020-12-03 12:36:25,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:25,292 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-12-03 12:36:25,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-03 12:36:25,292 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-12-03 12:36:25,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-03 12:36:25,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:25,301 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:25,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:25,525 INFO L429 AbstractCegarLoop]: === Iteration 9 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:36:25,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:25,526 INFO L82 PathProgramCache]: Analyzing trace with hash -2063375789, now seen corresponding path program 1 times [2020-12-03 12:36:25,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:25,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555111481] [2020-12-03 12:36:25,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:36:25,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555111481] [2020-12-03 12:36:25,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343432243] [2020-12-03 12:36:25,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_90634d00-9885-49e9-b181-180be15f8796/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:25,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 12:36:25,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:25,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:36:25,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:36:25,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2085465977] [2020-12-03 12:36:25,888 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2020-12-03 12:36:25,890 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:25,890 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-03 12:36:25,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:25,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2020-12-03 12:36:25,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289851695] [2020-12-03 12:36:25,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-03 12:36:25,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:25,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-03 12:36:25,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-12-03 12:36:25,898 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 12 states. [2020-12-03 12:36:26,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:26,135 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2020-12-03 12:36:26,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-03 12:36:26,136 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-12-03 12:36:26,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:26,137 INFO L225 Difference]: With dead ends: 93 [2020-12-03 12:36:26,137 INFO L226 Difference]: Without dead ends: 92 [2020-12-03 12:36:26,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-12-03 12:36:26,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-03 12:36:26,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2020-12-03 12:36:26,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-03 12:36:26,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-12-03 12:36:26,168 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 24 [2020-12-03 12:36:26,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:26,169 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-12-03 12:36:26,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-03 12:36:26,170 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-12-03 12:36:26,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-03 12:36:26,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:26,172 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:26,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:26,392 INFO L429 AbstractCegarLoop]: === Iteration 10 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:36:26,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:26,392 INFO L82 PathProgramCache]: Analyzing trace with hash 459860035, now seen corresponding path program 1 times [2020-12-03 12:36:26,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:26,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292239686] [2020-12-03 12:36:26,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:26,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-03 12:36:26,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292239686] [2020-12-03 12:36:26,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297650021] [2020-12-03 12:36:26,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_90634d00-9885-49e9-b181-180be15f8796/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:26,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 12:36:26,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-03 12:36:26,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-03 12:36:26,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1719305338] [2020-12-03 12:36:26,625 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2020-12-03 12:36:26,626 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:26,626 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-03 12:36:26,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:26,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2020-12-03 12:36:26,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44557721] [2020-12-03 12:36:26,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-03 12:36:26,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:26,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-03 12:36:26,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-03 12:36:26,631 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 9 states. [2020-12-03 12:36:26,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:26,732 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2020-12-03 12:36:26,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-03 12:36:26,732 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-12-03 12:36:26,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:26,734 INFO L225 Difference]: With dead ends: 96 [2020-12-03 12:36:26,735 INFO L226 Difference]: Without dead ends: 63 [2020-12-03 12:36:26,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-12-03 12:36:26,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-03 12:36:26,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2020-12-03 12:36:26,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-03 12:36:26,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-12-03 12:36:26,747 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 25 [2020-12-03 12:36:26,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:26,748 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-12-03 12:36:26,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-03 12:36:26,748 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-12-03 12:36:26,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-03 12:36:26,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:26,750 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:26,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:26,964 INFO L429 AbstractCegarLoop]: === Iteration 11 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:36:26,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:26,964 INFO L82 PathProgramCache]: Analyzing trace with hash 385020750, now seen corresponding path program 1 times [2020-12-03 12:36:26,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:26,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630435261] [2020-12-03 12:36:26,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:36:26,979 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:36:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:36:27,006 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:36:27,037 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-03 12:36:27,037 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 12:36:27,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-03 12:36:27,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:36:27 BoogieIcfgContainer [2020-12-03 12:36:27,098 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:36:27,098 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:36:27,098 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:36:27,098 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:36:27,099 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:36:22" (3/4) ... [2020-12-03 12:36:27,101 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-03 12:36:27,139 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_90634d00-9885-49e9-b181-180be15f8796/bin/utaipan/witness.graphml [2020-12-03 12:36:27,139 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:36:27,141 INFO L168 Benchmark]: Toolchain (without parser) took 5391.00 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 58.6 MB in the beginning and 104.3 MB in the end (delta: -45.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:36:27,141 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 90.2 MB. Free memory was 49.0 MB in the beginning and 49.0 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:36:27,144 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.15 ms. Allocated memory is still 90.2 MB. Free memory was 58.6 MB in the beginning and 68.2 MB in the end (delta: -9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:27,145 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.17 ms. Allocated memory is still 90.2 MB. Free memory was 68.2 MB in the beginning and 66.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:27,145 INFO L168 Benchmark]: Boogie Preprocessor took 39.80 ms. Allocated memory is still 90.2 MB. Free memory was 66.6 MB in the beginning and 65.7 MB in the end (delta: 868.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:36:27,147 INFO L168 Benchmark]: RCFGBuilder took 395.78 ms. Allocated memory is still 90.2 MB. Free memory was 65.7 MB in the beginning and 48.9 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:27,148 INFO L168 Benchmark]: TraceAbstraction took 4601.93 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 48.5 MB in the beginning and 106.4 MB in the end (delta: -57.9 MB). Peak memory consumption was 51.8 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:27,149 INFO L168 Benchmark]: Witness Printer took 41.16 ms. Allocated memory is still 132.1 MB. Free memory was 106.4 MB in the beginning and 104.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:27,152 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 90.2 MB. Free memory was 49.0 MB in the beginning and 49.0 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 270.15 ms. Allocated memory is still 90.2 MB. Free memory was 58.6 MB in the beginning and 68.2 MB in the end (delta: -9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.17 ms. Allocated memory is still 90.2 MB. Free memory was 68.2 MB in the beginning and 66.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.80 ms. Allocated memory is still 90.2 MB. Free memory was 66.6 MB in the beginning and 65.7 MB in the end (delta: 868.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 395.78 ms. Allocated memory is still 90.2 MB. Free memory was 65.7 MB in the beginning and 48.9 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4601.93 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 48.5 MB in the beginning and 106.4 MB in the end (delta: -57.9 MB). Peak memory consumption was 51.8 MB. Max. memory is 16.1 GB. * Witness Printer took 41.16 ms. Allocated memory is still 132.1 MB. Free memory was 106.4 MB in the beginning and 104.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 24]: integer overflow possible integer overflow possible We found a FailurePath: [L28] int m = __VERIFIER_nondet_int(); [L29] COND FALSE !(m < 0) [L32] int n = __VERIFIER_nondet_int(); [L33] COND FALSE !(n < 0) [L36] CALL mult(m, n) VAL [\old(m)=2, \old(n)=1073741824] [L18] COND FALSE !(m < 0) VAL [\old(m)=2, \old(n)=1073741824, m=2, n=1073741824] [L21] COND FALSE !(m == 0) VAL [\old(m)=2, \old(n)=1073741824, m=2, n=1073741824] [L24] EXPR m - 1 VAL [\old(m)=2, \old(n)=1073741824, m=2, n=1073741824] [L24] CALL, EXPR mult(n, m - 1) VAL [\old(m)=1, \old(n)=1073741824] [L18] COND FALSE !(m < 0) VAL [\old(m)=1, \old(n)=1073741824, m=1, n=1073741824] [L21] COND FALSE !(m == 0) VAL [\old(m)=1, \old(n)=1073741824, m=1, n=1073741824] [L24] EXPR m - 1 VAL [\old(m)=1, \old(n)=1073741824, m=1, n=1073741824] [L24] CALL, EXPR mult(n, m - 1) VAL [\old(m)=0, \old(n)=1073741824] [L18] COND FALSE !(m < 0) VAL [\old(m)=0, \old(n)=1073741824, m=0, n=1073741824] [L21] COND TRUE m == 0 [L22] return 0; VAL [\old(m)=0, \old(n)=1073741824, \result=0, m=0, n=1073741824] [L24] RET, EXPR mult(n, m - 1) VAL [\old(m)=1, \old(n)=1073741824, m=1, mult(n, m - 1)=0, n=1073741824] [L24] EXPR n + mult(n, m - 1) [L24] return n + mult(n, m - 1); [L24] RET, EXPR mult(n, m - 1) VAL [\old(m)=2, \old(n)=1073741824, m=2, mult(n, m - 1)=1073741824, n=1073741824] [L24] n + mult(n, m - 1) VAL [\old(m)=2, \old(n)=1073741824, m=2, mult(n, m - 1)=1073741824, n=1073741824] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 30 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.4s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 237 SDtfs, 307 SDslu, 609 SDs, 0 SdLazy, 579 SolverSat, 87 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 246 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 84 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 271 NumberOfCodeBlocks, 271 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 309 ConstructedInterpolants, 0 QuantifiedInterpolants, 15253 SizeOfPredicates, 9 NumberOfNonLiveVariables, 342 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 44/98 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! Received shutdown request...