./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/MultCommutative-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_13955051-1db9-4047-9dfe-479db3422c2c/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_13955051-1db9-4047-9dfe-479db3422c2c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_13955051-1db9-4047-9dfe-479db3422c2c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_13955051-1db9-4047-9dfe-479db3422c2c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/MultCommutative-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_13955051-1db9-4047-9dfe-479db3422c2c/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_13955051-1db9-4047-9dfe-479db3422c2c/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 32bit --witnessprinter.graph.data.programhash a755472942b72da612d26a2f3af20ed4332f07b5 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis No suitable file found in config dir /tmp/vcloud-vcloud-master/worker/run_dir_13955051-1db9-4047-9dfe-479db3422c2c/bin/utaipan/config using search string *Overflow*32bit*_Bitvector*.epf No suitable settings file found using Overflow*32bit*_Bitvector ERROR: UNSUPPORTED PROPERTY Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: IllegalArgumentException: Recursive programs are not supported. --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-26 02:35:56,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:35:56,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:35:56,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:35:56,356 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:35:56,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:35:56,359 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:35:56,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:35:56,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:35:56,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:35:56,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:35:56,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:35:56,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:35:56,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:35:56,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:35:56,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:35:56,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:35:56,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:35:56,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:35:56,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:35:56,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:35:56,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:35:56,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:35:56,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:35:56,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:35:56,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:35:56,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:35:56,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:35:56,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:35:56,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:35:56,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:35:56,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:35:56,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:35:56,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:35:56,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:35:56,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:35:56,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:35:56,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:35:56,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:35:56,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:35:56,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:35:56,409 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_13955051-1db9-4047-9dfe-479db3422c2c/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2019-11-26 02:35:56,433 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:35:56,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:35:56,434 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:35:56,434 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:35:56,434 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:35:56,434 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:35:56,434 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:35:56,435 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:35:56,435 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:35:56,435 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:35:56,435 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:35:56,435 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:35:56,436 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:35:56,436 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:35:56,436 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:35:56,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:35:56,437 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:35:56,437 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:35:56,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:35:56,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:35:56,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:35:56,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:35:56,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:35:56,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:35:56,438 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-11-26 02:35:56,438 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:35:56,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:35:56,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:35:56,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:35:56,439 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:35:56,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:35:56,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:35:56,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:35:56,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:35:56,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:35:56,441 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:35:56,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:35:56,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:35:56,442 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:35:56,442 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_13955051-1db9-4047-9dfe-479db3422c2c/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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a755472942b72da612d26a2f3af20ed4332f07b5 [2019-11-26 02:35:56,608 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:35:56,619 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:35:56,622 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:35:56,623 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:35:56,623 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:35:56,624 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_13955051-1db9-4047-9dfe-479db3422c2c/bin/utaipan/../../sv-benchmarks/c/recursive/MultCommutative-2.c [2019-11-26 02:35:56,676 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_13955051-1db9-4047-9dfe-479db3422c2c/bin/utaipan/data/ddc41e7b9/f2ffa767e2864d448bc7e5bb537db2c1/FLAG9e5cea3a3 [2019-11-26 02:35:57,055 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:35:57,056 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_13955051-1db9-4047-9dfe-479db3422c2c/sv-benchmarks/c/recursive/MultCommutative-2.c [2019-11-26 02:35:57,062 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_13955051-1db9-4047-9dfe-479db3422c2c/bin/utaipan/data/ddc41e7b9/f2ffa767e2864d448bc7e5bb537db2c1/FLAG9e5cea3a3 [2019-11-26 02:35:57,485 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_13955051-1db9-4047-9dfe-479db3422c2c/bin/utaipan/data/ddc41e7b9/f2ffa767e2864d448bc7e5bb537db2c1 [2019-11-26 02:35:57,488 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:35:57,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:35:57,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:35:57,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:35:57,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:35:57,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:35:57" (1/1) ... [2019-11-26 02:35:57,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23789068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:35:57, skipping insertion in model container [2019-11-26 02:35:57,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:35:57" (1/1) ... [2019-11-26 02:35:57,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:35:57,519 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:35:57,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:35:57,709 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:35:57,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:35:57,812 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:35:57,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:35:57 WrapperNode [2019-11-26 02:35:57,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:35:57,813 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:35:57,813 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:35:57,814 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:35:57,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:35:57" (1/1) ... [2019-11-26 02:35:57,831 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:35:57" (1/1) ... [2019-11-26 02:35:57,849 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:35:57,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:35:57,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:35:57,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:35:57,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:35:57" (1/1) ... [2019-11-26 02:35:57,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:35:57" (1/1) ... [2019-11-26 02:35:57,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:35:57" (1/1) ... [2019-11-26 02:35:57,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:35:57" (1/1) ... [2019-11-26 02:35:57,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:35:57" (1/1) ... [2019-11-26 02:35:57,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:35:57" (1/1) ... [2019-11-26 02:35:57,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:35:57" (1/1) ... [2019-11-26 02:35:57,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:35:57,878 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:35:57,878 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:35:57,879 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:35:57,881 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:35:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13955051-1db9-4047-9dfe-479db3422c2c/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 [2019-11-26 02:35:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2019-11-26 02:35:57,947 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2019-11-26 02:35:57,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:35:57,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:35:58,201 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:35:58,201 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:35:58,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:35:58 BoogieIcfgContainer [2019-11-26 02:35:58,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:35:58,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:35:58,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:35:58,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:35:58,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:35:57" (1/3) ... [2019-11-26 02:35:58,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7222e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:35:58, skipping insertion in model container [2019-11-26 02:35:58,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:35:57" (2/3) ... [2019-11-26 02:35:58,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7222e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:35:58, skipping insertion in model container [2019-11-26 02:35:58,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:35:58" (3/3) ... [2019-11-26 02:35:58,218 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2019-11-26 02:35:58,229 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:35:58,239 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-11-26 02:35:58,248 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-11-26 02:35:58,267 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:35:58,267 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:35:58,267 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:35:58,267 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:35:58,268 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:35:58,268 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:35:58,268 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:35:58,268 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:35:58,292 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-11-26 02:35:58,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 02:35:58,298 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:35:58,299 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:35:58,299 INFO L410 AbstractCegarLoop]: === Iteration 1 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:35:58,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:35:58,304 INFO L82 PathProgramCache]: Analyzing trace with hash 887577448, now seen corresponding path program 1 times [2019-11-26 02:35:58,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:35:58,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855360480] [2019-11-26 02:35:58,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:35:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:35:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:35:58,458 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855360480] [2019-11-26 02:35:58,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:35:58,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:35:58,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126034946] [2019-11-26 02:35:58,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:35:58,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:35:58,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:35:58,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:35:58,475 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2019-11-26 02:35:58,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:35:58,619 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2019-11-26 02:35:58,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:35:58,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-11-26 02:35:58,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:35:58,633 INFO L225 Difference]: With dead ends: 73 [2019-11-26 02:35:58,633 INFO L226 Difference]: Without dead ends: 42 [2019-11-26 02:35:58,641 INFO L630 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 [2019-11-26 02:35:58,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-26 02:35:58,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2019-11-26 02:35:58,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-26 02:35:58,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-11-26 02:35:58,678 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 7 [2019-11-26 02:35:58,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:35:58,678 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-11-26 02:35:58,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:35:58,679 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-11-26 02:35:58,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:35:58,679 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:35:58,679 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:35:58,680 INFO L410 AbstractCegarLoop]: === Iteration 2 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:35:58,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:35:58,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1745104164, now seen corresponding path program 1 times [2019-11-26 02:35:58,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:35:58,680 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380309277] [2019-11-26 02:35:58,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:35:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:35:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:35:58,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380309277] [2019-11-26 02:35:58,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:35:58,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:35:58,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820546994] [2019-11-26 02:35:58,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:35:58,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:35:58,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:35:58,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:35:58,730 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 5 states. [2019-11-26 02:35:58,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:35:58,852 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2019-11-26 02:35:58,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:35:58,853 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-26 02:35:58,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:35:58,855 INFO L225 Difference]: With dead ends: 58 [2019-11-26 02:35:58,855 INFO L226 Difference]: Without dead ends: 56 [2019-11-26 02:35:58,856 INFO L630 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 [2019-11-26 02:35:58,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-26 02:35:58,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2019-11-26 02:35:58,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-26 02:35:58,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2019-11-26 02:35:58,870 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 8 [2019-11-26 02:35:58,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:35:58,870 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2019-11-26 02:35:58,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:35:58,870 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2019-11-26 02:35:58,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-26 02:35:58,871 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:35:58,871 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:35:58,871 INFO L410 AbstractCegarLoop]: === Iteration 3 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:35:58,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:35:58,872 INFO L82 PathProgramCache]: Analyzing trace with hash 80311672, now seen corresponding path program 1 times [2019-11-26 02:35:58,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:35:58,872 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387389474] [2019-11-26 02:35:58,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:35:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:35:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:35:58,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387389474] [2019-11-26 02:35:58,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:35:58,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:35:58,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898509391] [2019-11-26 02:35:58,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:35:58,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:35:58,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:35:58,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:35:58,945 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 5 states. [2019-11-26 02:35:59,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:35:59,044 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2019-11-26 02:35:59,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:35:59,045 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-26 02:35:59,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:35:59,046 INFO L225 Difference]: With dead ends: 106 [2019-11-26 02:35:59,046 INFO L226 Difference]: Without dead ends: 64 [2019-11-26 02:35:59,048 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:35:59,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-26 02:35:59,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2019-11-26 02:35:59,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-26 02:35:59,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2019-11-26 02:35:59,067 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 13 [2019-11-26 02:35:59,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:35:59,067 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2019-11-26 02:35:59,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:35:59,067 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2019-11-26 02:35:59,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-26 02:35:59,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:35:59,068 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:35:59,068 INFO L410 AbstractCegarLoop]: === Iteration 4 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:35:59,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:35:59,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1248859076, now seen corresponding path program 1 times [2019-11-26 02:35:59,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:35:59,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104664666] [2019-11-26 02:35:59,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:35:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:35:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:35:59,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104664666] [2019-11-26 02:35:59,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:35:59,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:35:59,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369391302] [2019-11-26 02:35:59,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:35:59,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:35:59,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:35:59,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:35:59,138 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand 5 states. [2019-11-26 02:35:59,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:35:59,202 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2019-11-26 02:35:59,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:35:59,205 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-26 02:35:59,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:35:59,206 INFO L225 Difference]: With dead ends: 81 [2019-11-26 02:35:59,206 INFO L226 Difference]: Without dead ends: 54 [2019-11-26 02:35:59,207 INFO L630 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 [2019-11-26 02:35:59,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-26 02:35:59,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2019-11-26 02:35:59,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-26 02:35:59,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2019-11-26 02:35:59,226 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 14 [2019-11-26 02:35:59,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:35:59,226 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2019-11-26 02:35:59,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:35:59,226 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2019-11-26 02:35:59,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-26 02:35:59,227 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:35:59,228 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:35:59,228 INFO L410 AbstractCegarLoop]: === Iteration 5 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:35:59,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:35:59,229 INFO L82 PathProgramCache]: Analyzing trace with hash 59932744, now seen corresponding path program 1 times [2019-11-26 02:35:59,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:35:59,229 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916370640] [2019-11-26 02:35:59,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:35:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:35:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:35:59,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916370640] [2019-11-26 02:35:59,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:35:59,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:35:59,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457136208] [2019-11-26 02:35:59,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:35:59,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:35:59,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:35:59,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:35:59,280 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 5 states. [2019-11-26 02:35:59,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:35:59,332 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2019-11-26 02:35:59,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:35:59,336 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-26 02:35:59,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:35:59,337 INFO L225 Difference]: With dead ends: 57 [2019-11-26 02:35:59,337 INFO L226 Difference]: Without dead ends: 56 [2019-11-26 02:35:59,338 INFO L630 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 [2019-11-26 02:35:59,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-26 02:35:59,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2019-11-26 02:35:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-26 02:35:59,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2019-11-26 02:35:59,353 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 15 [2019-11-26 02:35:59,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:35:59,354 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2019-11-26 02:35:59,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:35:59,354 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2019-11-26 02:35:59,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-26 02:35:59,355 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:35:59,356 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:35:59,356 INFO L410 AbstractCegarLoop]: === Iteration 6 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:35:59,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:35:59,357 INFO L82 PathProgramCache]: Analyzing trace with hash -65083495, now seen corresponding path program 1 times [2019-11-26 02:35:59,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:35:59,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19789530] [2019-11-26 02:35:59,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:35:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:35:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:35:59,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19789530] [2019-11-26 02:35:59,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952022465] [2019-11-26 02:35:59,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13955051-1db9-4047-9dfe-479db3422c2c/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 [2019-11-26 02:35:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:35:59,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:35:59,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:35:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:35:59,502 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:35:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:35:59,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1679751020] [2019-11-26 02:35:59,608 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-26 02:35:59,608 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:35:59,614 FATAL L310 FreeRefinementEngine]: Exception during interpolant generation: IllegalArgumentException [2019-11-26 02:35:59,818 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:35:59,819 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an 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:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) 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:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-26 02:35:59,829 INFO L168 Benchmark]: Toolchain (without parser) took 2339.28 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 115.3 MB). Free memory was 950.0 MB in the beginning and 973.5 MB in the end (delta: -23.5 MB). Peak memory consumption was 91.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:35:59,829 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:35:59,830 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.87 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 115.3 MB). Free memory was 950.0 MB in the beginning and 1.1 GB in the end (delta: -160.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:35:59,831 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.17 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:35:59,831 INFO L168 Benchmark]: Boogie Preprocessor took 28.23 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:35:59,832 INFO L168 Benchmark]: RCFGBuilder took 324.43 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:35:59,832 INFO L168 Benchmark]: TraceAbstraction took 1624.00 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 973.5 MB in the end (delta: 112.8 MB). Peak memory consumption was 112.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:35:59,835 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 322.87 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 115.3 MB). Free memory was 950.0 MB in the beginning and 1.1 GB in the end (delta: -160.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 36.17 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 28.23 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 324.43 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1624.00 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 973.5 MB in the end (delta: 112.8 MB). Peak memory consumption was 112.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalArgumentException: Recursive programs are not supported. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: Recursive programs are not supported.: de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...