./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_7c648077-e67b-465e-b923-4f387984affc/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_7c648077-e67b-465e-b923-4f387984affc/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7c648077-e67b-465e-b923-4f387984affc/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7c648077-e67b-465e-b923-4f387984affc/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/MultCommutative-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_7c648077-e67b-465e-b923-4f387984affc/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7c648077-e67b-465e-b923-4f387984affc/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 [2020-12-09 20:23:04,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 20:23:04,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 20:23:04,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 20:23:04,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 20:23:04,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 20:23:04,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 20:23:04,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 20:23:04,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 20:23:04,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 20:23:04,784 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 20:23:04,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 20:23:04,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 20:23:04,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 20:23:04,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 20:23:04,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 20:23:04,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 20:23:04,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 20:23:04,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 20:23:04,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 20:23:04,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 20:23:04,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 20:23:04,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 20:23:04,800 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 20:23:04,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 20:23:04,804 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 20:23:04,804 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 20:23:04,806 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 20:23:04,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 20:23:04,807 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 20:23:04,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 20:23:04,809 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 20:23:04,809 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 20:23:04,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 20:23:04,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 20:23:04,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 20:23:04,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 20:23:04,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 20:23:04,812 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 20:23:04,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 20:23:04,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 20:23:04,814 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7c648077-e67b-465e-b923-4f387984affc/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-12-09 20:23:04,831 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 20:23:04,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 20:23:04,832 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 20:23:04,832 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 20:23:04,832 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 20:23:04,832 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 20:23:04,832 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 20:23:04,832 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 20:23:04,832 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 20:23:04,832 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 20:23:04,833 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 20:23:04,833 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 20:23:04,833 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 20:23:04,833 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 20:23:04,833 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 20:23:04,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 20:23:04,834 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 20:23:04,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 20:23:04,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 20:23:04,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 20:23:04,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 20:23:04,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 20:23:04,834 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-09 20:23:04,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 20:23:04,834 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 20:23:04,835 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 20:23:04,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 20:23:04,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 20:23:04,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 20:23:04,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 20:23:04,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 20:23:04,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 20:23:04,835 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 20:23:04,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 20:23:04,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 20:23:04,836 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 20:23:04,836 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 20:23:04,836 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_7c648077-e67b-465e-b923-4f387984affc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_7c648077-e67b-465e-b923-4f387984affc/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f536dfaa325c5623e8e0c5d03d4d9d96bd998e26 [2020-12-09 20:23:05,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 20:23:05,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 20:23:05,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 20:23:05,059 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 20:23:05,060 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 20:23:05,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7c648077-e67b-465e-b923-4f387984affc/bin/utaipan/../../sv-benchmarks/c/termination-numeric/MultCommutative-1.c [2020-12-09 20:23:05,103 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7c648077-e67b-465e-b923-4f387984affc/bin/utaipan/data/9c5bff1bf/73cf802be7fe45918ab3eb4d022db29a/FLAGdf823a771 [2020-12-09 20:23:05,452 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 20:23:05,452 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7c648077-e67b-465e-b923-4f387984affc/sv-benchmarks/c/termination-numeric/MultCommutative-1.c [2020-12-09 20:23:05,456 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7c648077-e67b-465e-b923-4f387984affc/bin/utaipan/data/9c5bff1bf/73cf802be7fe45918ab3eb4d022db29a/FLAGdf823a771 [2020-12-09 20:23:05,466 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7c648077-e67b-465e-b923-4f387984affc/bin/utaipan/data/9c5bff1bf/73cf802be7fe45918ab3eb4d022db29a [2020-12-09 20:23:05,468 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 20:23:05,469 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 20:23:05,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 20:23:05,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 20:23:05,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 20:23:05,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:23:05" (1/1) ... [2020-12-09 20:23:05,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47e21a07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:05, skipping insertion in model container [2020-12-09 20:23:05,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:23:05" (1/1) ... [2020-12-09 20:23:05,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 20:23:05,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 20:23:05,597 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_7c648077-e67b-465e-b923-4f387984affc/sv-benchmarks/c/termination-numeric/MultCommutative-1.c[1008,1021] [2020-12-09 20:23:05,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:23:05,604 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 20:23:05,615 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_7c648077-e67b-465e-b923-4f387984affc/sv-benchmarks/c/termination-numeric/MultCommutative-1.c[1008,1021] [2020-12-09 20:23:05,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:23:05,625 INFO L208 MainTranslator]: Completed translation [2020-12-09 20:23:05,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:05 WrapperNode [2020-12-09 20:23:05,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 20:23:05,626 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 20:23:05,626 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 20:23:05,626 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 20:23:05,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:05" (1/1) ... [2020-12-09 20:23:05,636 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:05" (1/1) ... [2020-12-09 20:23:05,647 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 20:23:05,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 20:23:05,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 20:23:05,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 20:23:05,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:05" (1/1) ... [2020-12-09 20:23:05,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:05" (1/1) ... [2020-12-09 20:23:05,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:05" (1/1) ... [2020-12-09 20:23:05,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:05" (1/1) ... [2020-12-09 20:23:05,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:05" (1/1) ... [2020-12-09 20:23:05,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:05" (1/1) ... [2020-12-09 20:23:05,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:05" (1/1) ... [2020-12-09 20:23:05,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 20:23:05,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 20:23:05,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 20:23:05,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 20:23:05,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7c648077-e67b-465e-b923-4f387984affc/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 [2020-12-09 20:23:05,718 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-12-09 20:23:05,718 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-12-09 20:23:05,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 20:23:05,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 20:23:05,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 20:23:05,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 20:23:05,903 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 20:23:05,903 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-09 20:23:05,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:23:05 BoogieIcfgContainer [2020-12-09 20:23:05,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 20:23:05,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 20:23:05,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 20:23:05,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 20:23:05,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:23:05" (1/3) ... [2020-12-09 20:23:05,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d50984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:23:05, skipping insertion in model container [2020-12-09 20:23:05,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:05" (2/3) ... [2020-12-09 20:23:05,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d50984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:23:05, skipping insertion in model container [2020-12-09 20:23:05,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:23:05" (3/3) ... [2020-12-09 20:23:05,911 INFO L111 eAbstractionObserver]: Analyzing ICFG MultCommutative-1.c [2020-12-09 20:23:05,921 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 20:23:05,923 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-09 20:23:05,931 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-09 20:23:05,947 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 20:23:05,947 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 20:23:05,947 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 20:23:05,947 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 20:23:05,948 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 20:23:05,948 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 20:23:05,948 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 20:23:05,948 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 20:23:05,959 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-09 20:23:05,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 20:23:05,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:23:05,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:23:05,962 INFO L429 AbstractCegarLoop]: === Iteration 1 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:23:05,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:23:05,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1027513993, now seen corresponding path program 1 times [2020-12-09 20:23:05,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:23:05,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165051430] [2020-12-09 20:23:05,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:23:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:23:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:23:06,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165051430] [2020-12-09 20:23:06,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:23:06,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:23:06,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408475322] [2020-12-09 20:23:06,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:23:06,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:23:06,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:23:06,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:23:06,129 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-12-09 20:23:06,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:23:06,225 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2020-12-09 20:23:06,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 20:23:06,226 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-09 20:23:06,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:23:06,232 INFO L225 Difference]: With dead ends: 73 [2020-12-09 20:23:06,233 INFO L226 Difference]: Without dead ends: 42 [2020-12-09 20:23:06,236 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 [2020-12-09 20:23:06,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-09 20:23:06,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-12-09 20:23:06,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-09 20:23:06,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-12-09 20:23:06,273 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 7 [2020-12-09 20:23:06,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:23:06,274 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-12-09 20:23:06,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:23:06,274 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-12-09 20:23:06,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 20:23:06,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:23:06,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:23:06,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 20:23:06,275 INFO L429 AbstractCegarLoop]: === Iteration 2 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:23:06,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:23:06,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1788169763, now seen corresponding path program 1 times [2020-12-09 20:23:06,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:23:06,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001627351] [2020-12-09 20:23:06,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:23:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:23:06,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:23:06,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001627351] [2020-12-09 20:23:06,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:23:06,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:23:06,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712856285] [2020-12-09 20:23:06,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:23:06,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:23:06,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:23:06,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:23:06,313 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 5 states. [2020-12-09 20:23:06,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:23:06,378 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2020-12-09 20:23:06,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 20:23:06,378 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-09 20:23:06,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:23:06,380 INFO L225 Difference]: With dead ends: 58 [2020-12-09 20:23:06,380 INFO L226 Difference]: Without dead ends: 56 [2020-12-09 20:23:06,381 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 [2020-12-09 20:23:06,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-09 20:23:06,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-12-09 20:23:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-09 20:23:06,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2020-12-09 20:23:06,392 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 8 [2020-12-09 20:23:06,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:23:06,392 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2020-12-09 20:23:06,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:23:06,392 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2020-12-09 20:23:06,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 20:23:06,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:23:06,393 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:23:06,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 20:23:06,393 INFO L429 AbstractCegarLoop]: === Iteration 3 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:23:06,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:23:06,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1125158968, now seen corresponding path program 1 times [2020-12-09 20:23:06,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:23:06,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695232571] [2020-12-09 20:23:06,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:23:06,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:23:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:23:06,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695232571] [2020-12-09 20:23:06,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:23:06,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:23:06,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255855872] [2020-12-09 20:23:06,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:23:06,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:23:06,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:23:06,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:23:06,443 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 5 states. [2020-12-09 20:23:06,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:23:06,497 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2020-12-09 20:23:06,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 20:23:06,498 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-09 20:23:06,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:23:06,499 INFO L225 Difference]: With dead ends: 76 [2020-12-09 20:23:06,499 INFO L226 Difference]: Without dead ends: 75 [2020-12-09 20:23:06,500 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 [2020-12-09 20:23:06,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-09 20:23:06,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2020-12-09 20:23:06,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-09 20:23:06,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2020-12-09 20:23:06,510 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 13 [2020-12-09 20:23:06,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:23:06,510 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2020-12-09 20:23:06,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:23:06,510 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2020-12-09 20:23:06,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 20:23:06,511 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:23:06,511 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:23:06,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 20:23:06,511 INFO L429 AbstractCegarLoop]: === Iteration 4 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:23:06,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:23:06,512 INFO L82 PathProgramCache]: Analyzing trace with hash -691954174, now seen corresponding path program 1 times [2020-12-09 20:23:06,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:23:06,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771705512] [2020-12-09 20:23:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:23:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:23:06,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:23:06,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771705512] [2020-12-09 20:23:06,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:23:06,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:23:06,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131773294] [2020-12-09 20:23:06,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:23:06,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:23:06,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:23:06,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:23:06,549 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand 5 states. [2020-12-09 20:23:06,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:23:06,595 INFO L93 Difference]: Finished difference Result 120 states and 154 transitions. [2020-12-09 20:23:06,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 20:23:06,596 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-09 20:23:06,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:23:06,598 INFO L225 Difference]: With dead ends: 120 [2020-12-09 20:23:06,598 INFO L226 Difference]: Without dead ends: 84 [2020-12-09 20:23:06,600 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 [2020-12-09 20:23:06,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-09 20:23:06,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2020-12-09 20:23:06,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-09 20:23:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2020-12-09 20:23:06,614 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 14 [2020-12-09 20:23:06,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:23:06,614 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2020-12-09 20:23:06,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:23:06,614 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2020-12-09 20:23:06,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 20:23:06,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:23:06,615 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:23:06,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 20:23:06,615 INFO L429 AbstractCegarLoop]: === Iteration 5 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:23:06,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:23:06,616 INFO L82 PathProgramCache]: Analyzing trace with hash 24264138, now seen corresponding path program 1 times [2020-12-09 20:23:06,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:23:06,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15267262] [2020-12-09 20:23:06,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:23:06,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:23:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:23:06,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15267262] [2020-12-09 20:23:06,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:23:06,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 20:23:06,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314046717] [2020-12-09 20:23:06,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:23:06,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:23:06,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:23:06,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:23:06,653 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand 5 states. [2020-12-09 20:23:06,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:23:06,695 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2020-12-09 20:23:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 20:23:06,696 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-09 20:23:06,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:23:06,697 INFO L225 Difference]: With dead ends: 101 [2020-12-09 20:23:06,697 INFO L226 Difference]: Without dead ends: 100 [2020-12-09 20:23:06,697 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 [2020-12-09 20:23:06,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-09 20:23:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2020-12-09 20:23:06,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-09 20:23:06,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2020-12-09 20:23:06,707 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 15 [2020-12-09 20:23:06,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:23:06,707 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2020-12-09 20:23:06,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:23:06,707 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2020-12-09 20:23:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 20:23:06,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:23:06,708 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:23:06,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 20:23:06,708 INFO L429 AbstractCegarLoop]: === Iteration 6 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:23:06,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:23:06,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1116235770, now seen corresponding path program 1 times [2020-12-09 20:23:06,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:23:06,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742550713] [2020-12-09 20:23:06,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:23:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:23:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:23:06,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742550713] [2020-12-09 20:23:06,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:23:06,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 20:23:06,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53704971] [2020-12-09 20:23:06,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:23:06,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:23:06,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:23:06,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:23:06,746 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand 5 states. [2020-12-09 20:23:06,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:23:06,781 INFO L93 Difference]: Finished difference Result 132 states and 168 transitions. [2020-12-09 20:23:06,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 20:23:06,781 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-09 20:23:06,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:23:06,782 INFO L225 Difference]: With dead ends: 132 [2020-12-09 20:23:06,782 INFO L226 Difference]: Without dead ends: 58 [2020-12-09 20:23:06,783 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 [2020-12-09 20:23:06,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-09 20:23:06,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2020-12-09 20:23:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-09 20:23:06,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-12-09 20:23:06,788 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 18 [2020-12-09 20:23:06,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:23:06,789 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-12-09 20:23:06,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:23:06,789 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-12-09 20:23:06,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 20:23:06,789 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:23:06,789 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:23:06,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 20:23:06,790 INFO L429 AbstractCegarLoop]: === Iteration 7 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:23:06,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:23:06,790 INFO L82 PathProgramCache]: Analyzing trace with hash 937076250, now seen corresponding path program 1 times [2020-12-09 20:23:06,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:23:06,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602836894] [2020-12-09 20:23:06,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:23:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:23:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:23:06,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602836894] [2020-12-09 20:23:06,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981816772] [2020-12-09 20:23:06,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7c648077-e67b-465e-b923-4f387984affc/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 [2020-12-09 20:23:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:23:06,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 20:23:06,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:23:06,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:23:06,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:23:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:23:06,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [967694456] [2020-12-09 20:23:06,991 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-12-09 20:23:06,992 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:23:06,995 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) [2020-12-09 20:23:06,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:23:06,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2020-12-09 20:23:06,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217564132] [2020-12-09 20:23:06,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 20:23:06,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:23:06,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 20:23:06,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-09 20:23:06,998 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 10 states. [2020-12-09 20:23:07,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:23:07,076 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2020-12-09 20:23:07,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 20:23:07,076 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-12-09 20:23:07,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:23:07,077 INFO L225 Difference]: With dead ends: 66 [2020-12-09 20:23:07,077 INFO L226 Difference]: Without dead ends: 65 [2020-12-09 20:23:07,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-12-09 20:23:07,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-09 20:23:07,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2020-12-09 20:23:07,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-09 20:23:07,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-12-09 20:23:07,083 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 17 [2020-12-09 20:23:07,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:23:07,083 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-12-09 20:23:07,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 20:23:07,083 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2020-12-09 20:23:07,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 20:23:07,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:23:07,084 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:23:07,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-09 20:23:07,285 INFO L429 AbstractCegarLoop]: === Iteration 8 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:23:07,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:23:07,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1015407268, now seen corresponding path program 1 times [2020-12-09 20:23:07,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:23:07,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596423169] [2020-12-09 20:23:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:23:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:23:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:23:07,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596423169] [2020-12-09 20:23:07,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337682232] [2020-12-09 20:23:07,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7c648077-e67b-465e-b923-4f387984affc/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 [2020-12-09 20:23:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:23:07,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 20:23:07,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:23:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:23:07,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:23:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:23:07,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2138274159] [2020-12-09 20:23:07,595 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-12-09 20:23:07,595 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:23:07,595 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) [2020-12-09 20:23:07,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:23:07,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2020-12-09 20:23:07,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340029646] [2020-12-09 20:23:07,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 20:23:07,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:23:07,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 20:23:07,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-09 20:23:07,596 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand 9 states. [2020-12-09 20:23:07,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:23:07,679 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-12-09 20:23:07,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 20:23:07,679 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-12-09 20:23:07,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:23:07,680 INFO L225 Difference]: With dead ends: 64 [2020-12-09 20:23:07,680 INFO L226 Difference]: Without dead ends: 63 [2020-12-09 20:23:07,680 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 [2020-12-09 20:23:07,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-09 20:23:07,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2020-12-09 20:23:07,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-09 20:23:07,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-12-09 20:23:07,685 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 18 [2020-12-09 20:23:07,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:23:07,685 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-12-09 20:23:07,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 20:23:07,685 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-12-09 20:23:07,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-09 20:23:07,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:23:07,686 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:23:07,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:23:07,887 INFO L429 AbstractCegarLoop]: === Iteration 9 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:23:07,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:23:07,887 INFO L82 PathProgramCache]: Analyzing trace with hash -2063375789, now seen corresponding path program 1 times [2020-12-09 20:23:07,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:23:07,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616786879] [2020-12-09 20:23:07,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:23:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:23:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:23:07,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616786879] [2020-12-09 20:23:07,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395922265] [2020-12-09 20:23:07,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7c648077-e67b-465e-b923-4f387984affc/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 [2020-12-09 20:23:07,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:23:07,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 20:23:07,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:23:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:23:08,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:23:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:23:08,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1820125646] [2020-12-09 20:23:08,062 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2020-12-09 20:23:08,062 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:23:08,063 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) [2020-12-09 20:23:08,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:23:08,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2020-12-09 20:23:08,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111469690] [2020-12-09 20:23:08,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 20:23:08,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:23:08,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 20:23:08,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-12-09 20:23:08,064 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 12 states. [2020-12-09 20:23:08,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:23:08,197 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2020-12-09 20:23:08,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 20:23:08,197 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-12-09 20:23:08,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:23:08,198 INFO L225 Difference]: With dead ends: 93 [2020-12-09 20:23:08,198 INFO L226 Difference]: Without dead ends: 92 [2020-12-09 20:23:08,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-12-09 20:23:08,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-09 20:23:08,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2020-12-09 20:23:08,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-09 20:23:08,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-12-09 20:23:08,204 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 24 [2020-12-09 20:23:08,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:23:08,205 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-12-09 20:23:08,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 20:23:08,205 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-12-09 20:23:08,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-09 20:23:08,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:23:08,205 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:23:08,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:23:08,407 INFO L429 AbstractCegarLoop]: === Iteration 10 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:23:08,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:23:08,408 INFO L82 PathProgramCache]: Analyzing trace with hash 459860035, now seen corresponding path program 1 times [2020-12-09 20:23:08,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:23:08,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243003278] [2020-12-09 20:23:08,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:23:08,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:23:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 20:23:08,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243003278] [2020-12-09 20:23:08,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546481255] [2020-12-09 20:23:08,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7c648077-e67b-465e-b923-4f387984affc/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 [2020-12-09 20:23:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:23:08,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 20:23:08,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:23:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-09 20:23:08,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:23:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-09 20:23:08,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [134349632] [2020-12-09 20:23:08,627 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2020-12-09 20:23:08,627 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:23:08,627 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) [2020-12-09 20:23:08,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:23:08,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2020-12-09 20:23:08,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980084671] [2020-12-09 20:23:08,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 20:23:08,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:23:08,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 20:23:08,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-09 20:23:08,629 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 9 states. [2020-12-09 20:23:08,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:23:08,697 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2020-12-09 20:23:08,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 20:23:08,698 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-12-09 20:23:08,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:23:08,699 INFO L225 Difference]: With dead ends: 96 [2020-12-09 20:23:08,699 INFO L226 Difference]: Without dead ends: 63 [2020-12-09 20:23:08,699 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 [2020-12-09 20:23:08,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-09 20:23:08,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2020-12-09 20:23:08,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-09 20:23:08,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-12-09 20:23:08,705 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 25 [2020-12-09 20:23:08,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:23:08,706 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-12-09 20:23:08,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 20:23:08,706 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-12-09 20:23:08,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 20:23:08,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:23:08,707 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:23:08,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:23:08,909 INFO L429 AbstractCegarLoop]: === Iteration 11 === [multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:23:08,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:23:08,910 INFO L82 PathProgramCache]: Analyzing trace with hash 385020750, now seen corresponding path program 1 times [2020-12-09 20:23:08,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:23:08,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711865398] [2020-12-09 20:23:08,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:23:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 20:23:08,955 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 20:23:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 20:23:08,992 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 20:23:09,032 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 20:23:09,032 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 20:23:09,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-09 20:23:09,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:23:09 BoogieIcfgContainer [2020-12-09 20:23:09,066 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 20:23:09,066 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 20:23:09,066 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 20:23:09,066 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 20:23:09,067 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:23:05" (3/4) ... [2020-12-09 20:23:09,068 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 20:23:09,098 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_7c648077-e67b-465e-b923-4f387984affc/bin/utaipan/witness.graphml [2020-12-09 20:23:09,099 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 20:23:09,100 INFO L168 Benchmark]: Toolchain (without parser) took 3630.30 ms. Allocated memory was 96.5 MB in the beginning and 142.6 MB in the end (delta: 46.1 MB). Free memory was 56.9 MB in the beginning and 91.5 MB in the end (delta: -34.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 20:23:09,100 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 96.5 MB. Free memory is still 72.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:23:09,100 INFO L168 Benchmark]: CACSL2BoogieTranslator took 155.15 ms. Allocated memory is still 96.5 MB. Free memory was 56.7 MB in the beginning and 71.3 MB in the end (delta: -14.7 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:23:09,101 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.42 ms. Allocated memory is still 96.5 MB. Free memory was 71.3 MB in the beginning and 70.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:23:09,101 INFO L168 Benchmark]: Boogie Preprocessor took 12.65 ms. Allocated memory is still 96.5 MB. Free memory was 70.0 MB in the beginning and 69.0 MB in the end (delta: 952.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:23:09,101 INFO L168 Benchmark]: RCFGBuilder took 244.19 ms. Allocated memory is still 96.5 MB. Free memory was 68.9 MB in the beginning and 66.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 20:23:09,102 INFO L168 Benchmark]: TraceAbstraction took 3159.74 ms. Allocated memory was 96.5 MB in the beginning and 142.6 MB in the end (delta: 46.1 MB). Free memory was 65.6 MB in the beginning and 93.7 MB in the end (delta: -28.1 MB). Peak memory consumption was 21.2 MB. Max. memory is 16.1 GB. [2020-12-09 20:23:09,102 INFO L168 Benchmark]: Witness Printer took 32.63 ms. Allocated memory is still 142.6 MB. Free memory was 93.7 MB in the beginning and 91.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:23:09,104 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 96.5 MB. Free memory is still 72.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 155.15 ms. Allocated memory is still 96.5 MB. Free memory was 56.7 MB in the beginning and 71.3 MB in the end (delta: -14.7 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 21.42 ms. Allocated memory is still 96.5 MB. Free memory was 71.3 MB in the beginning and 70.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 12.65 ms. Allocated memory is still 96.5 MB. Free memory was 70.0 MB in the beginning and 69.0 MB in the end (delta: 952.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 244.19 ms. Allocated memory is still 96.5 MB. Free memory was 68.9 MB in the beginning and 66.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3159.74 ms. Allocated memory was 96.5 MB in the beginning and 142.6 MB in the end (delta: 46.1 MB). Free memory was 65.6 MB in the beginning and 93.7 MB in the end (delta: -28.1 MB). Peak memory consumption was 21.2 MB. Max. memory is 16.1 GB. * Witness Printer took 32.63 ms. Allocated memory is still 142.6 MB. Free memory was 93.7 MB in the beginning and 91.5 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: 3.0s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 0.7s, 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, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 246 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s 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: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 84 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s 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...