./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/TwoWay.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2a90aba4-cc09-4df0-aaec-035e63096bcd/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2a90aba4-cc09-4df0-aaec-035e63096bcd/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2a90aba4-cc09-4df0-aaec-035e63096bcd/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2a90aba4-cc09-4df0-aaec-035e63096bcd/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/TwoWay.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2a90aba4-cc09-4df0-aaec-035e63096bcd/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2a90aba4-cc09-4df0-aaec-035e63096bcd/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 dd635190a9aa277670265f46b90ecce0c321a2a9 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:57:14,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:57:14,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:57:14,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:57:14,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:57:14,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:57:14,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:57:14,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:57:14,450 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:57:14,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:57:14,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:57:14,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:57:14,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:57:14,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:57:14,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:57:14,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:57:14,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:57:14,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:57:14,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:57:14,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:57:14,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:57:14,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:57:14,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:57:14,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:57:14,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:57:14,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:57:14,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:57:14,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:57:14,515 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:57:14,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:57:14,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:57:14,519 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:57:14,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:57:14,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:57:14,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:57:14,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:57:14,526 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:57:14,526 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:57:14,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:57:14,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:57:14,528 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:57:14,531 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2a90aba4-cc09-4df0-aaec-035e63096bcd/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-11-30 01:57:14,579 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:57:14,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:57:14,581 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 01:57:14,581 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 01:57:14,582 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 01:57:14,582 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 01:57:14,582 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 01:57:14,583 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 01:57:14,583 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 01:57:14,583 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 01:57:14,584 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 01:57:14,585 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 01:57:14,585 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 01:57:14,586 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 01:57:14,586 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 01:57:14,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:57:14,587 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 01:57:14,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:57:14,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:57:14,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:57:14,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:57:14,589 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:57:14,589 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-30 01:57:14,589 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:57:14,589 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:57:14,590 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:57:14,590 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:57:14,590 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:57:14,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:57:14,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:57:14,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:57:14,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:57:14,592 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:57:14,593 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 01:57:14,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:57:14,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:57:14,593 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:57:14,594 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:57:14,594 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_2a90aba4-cc09-4df0-aaec-035e63096bcd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2a90aba4-cc09-4df0-aaec-035e63096bcd/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd635190a9aa277670265f46b90ecce0c321a2a9 [2020-11-30 01:57:14,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:57:14,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:57:14,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:57:14,967 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:57:14,968 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:57:14,969 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2a90aba4-cc09-4df0-aaec-035e63096bcd/bin/utaipan/../../sv-benchmarks/c/termination-numeric/TwoWay.c [2020-11-30 01:57:15,076 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2a90aba4-cc09-4df0-aaec-035e63096bcd/bin/utaipan/data/9e6469048/a7929396c76f442e98f5bac97a83aa90/FLAG8ca4f567a [2020-11-30 01:57:15,678 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:57:15,679 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2a90aba4-cc09-4df0-aaec-035e63096bcd/sv-benchmarks/c/termination-numeric/TwoWay.c [2020-11-30 01:57:15,693 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2a90aba4-cc09-4df0-aaec-035e63096bcd/bin/utaipan/data/9e6469048/a7929396c76f442e98f5bac97a83aa90/FLAG8ca4f567a [2020-11-30 01:57:16,045 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2a90aba4-cc09-4df0-aaec-035e63096bcd/bin/utaipan/data/9e6469048/a7929396c76f442e98f5bac97a83aa90 [2020-11-30 01:57:16,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:57:16,050 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:57:16,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:57:16,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:57:16,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:57:16,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:57:16" (1/1) ... [2020-11-30 01:57:16,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e50bffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16, skipping insertion in model container [2020-11-30 01:57:16,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:57:16" (1/1) ... [2020-11-30 01:57:16,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:57:16,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:57:16,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:57:16,303 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:57:16,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:57:16,339 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:57:16,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16 WrapperNode [2020-11-30 01:57:16,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:57:16,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:57:16,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:57:16,342 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:57:16,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16" (1/1) ... [2020-11-30 01:57:16,355 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16" (1/1) ... [2020-11-30 01:57:16,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:57:16,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:57:16,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:57:16,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:57:16,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16" (1/1) ... [2020-11-30 01:57:16,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16" (1/1) ... [2020-11-30 01:57:16,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16" (1/1) ... [2020-11-30 01:57:16,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16" (1/1) ... [2020-11-30 01:57:16,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16" (1/1) ... [2020-11-30 01:57:16,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16" (1/1) ... [2020-11-30 01:57:16,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16" (1/1) ... [2020-11-30 01:57:16,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:57:16,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:57:16,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:57:16,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:57:16,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a90aba4-cc09-4df0-aaec-035e63096bcd/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 [2020-11-30 01:57:16,500 INFO L130 BoogieDeclarations]: Found specification of procedure twoWay [2020-11-30 01:57:16,501 INFO L138 BoogieDeclarations]: Found implementation of procedure twoWay [2020-11-30 01:57:16,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:57:16,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:57:16,825 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:57:16,825 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-30 01:57:16,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:57:16 BoogieIcfgContainer [2020-11-30 01:57:16,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:57:16,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:57:16,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:57:16,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:57:16,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:57:16" (1/3) ... [2020-11-30 01:57:16,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bd3808c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:57:16, skipping insertion in model container [2020-11-30 01:57:16,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16" (2/3) ... [2020-11-30 01:57:16,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bd3808c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:57:16, skipping insertion in model container [2020-11-30 01:57:16,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:57:16" (3/3) ... [2020-11-30 01:57:16,839 INFO L111 eAbstractionObserver]: Analyzing ICFG TwoWay.c [2020-11-30 01:57:16,853 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:57:16,868 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-11-30 01:57:16,884 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-30 01:57:16,923 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:57:16,923 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:57:16,923 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:57:16,924 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:57:16,924 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:57:16,924 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:57:16,924 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:57:16,924 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:57:16,944 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-11-30 01:57:16,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 01:57:16,950 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:57:16,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:57:16,951 INFO L429 AbstractCegarLoop]: === Iteration 1 === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:57:16,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:57:16,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1734939443, now seen corresponding path program 1 times [2020-11-30 01:57:16,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:57:16,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441952201] [2020-11-30 01:57:16,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:57:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:57:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:57:17,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441952201] [2020-11-30 01:57:17,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:57:17,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 01:57:17,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877746851] [2020-11-30 01:57:17,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 01:57:17,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:57:17,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 01:57:17,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:57:17,303 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 7 states. [2020-11-30 01:57:17,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:57:17,884 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-11-30 01:57:17,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 01:57:17,887 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2020-11-30 01:57:17,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:57:17,903 INFO L225 Difference]: With dead ends: 55 [2020-11-30 01:57:17,915 INFO L226 Difference]: Without dead ends: 51 [2020-11-30 01:57:17,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:57:17,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-30 01:57:17,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 37. [2020-11-30 01:57:17,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-30 01:57:17,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2020-11-30 01:57:17,983 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 8 [2020-11-30 01:57:17,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:57:17,984 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2020-11-30 01:57:17,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 01:57:17,984 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2020-11-30 01:57:17,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 01:57:17,985 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:57:17,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:57:17,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:57:17,986 INFO L429 AbstractCegarLoop]: === Iteration 2 === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:57:17,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:57:17,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1734939635, now seen corresponding path program 1 times [2020-11-30 01:57:17,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:57:17,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024853843] [2020-11-30 01:57:17,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:57:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:57:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:57:18,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024853843] [2020-11-30 01:57:18,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:57:18,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:57:18,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237601918] [2020-11-30 01:57:18,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:57:18,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:57:18,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:57:18,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:57:18,059 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand 4 states. [2020-11-30 01:57:18,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:57:18,101 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2020-11-30 01:57:18,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:57:18,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-30 01:57:18,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:57:18,103 INFO L225 Difference]: With dead ends: 45 [2020-11-30 01:57:18,103 INFO L226 Difference]: Without dead ends: 18 [2020-11-30 01:57:18,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:57:18,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-30 01:57:18,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-30 01:57:18,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-30 01:57:18,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-11-30 01:57:18,111 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2020-11-30 01:57:18,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:57:18,112 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-11-30 01:57:18,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:57:18,112 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-11-30 01:57:18,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 01:57:18,113 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:57:18,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:57:18,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:57:18,114 INFO L429 AbstractCegarLoop]: === Iteration 3 === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:57:18,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:57:18,115 INFO L82 PathProgramCache]: Analyzing trace with hash -2051452074, now seen corresponding path program 1 times [2020-11-30 01:57:18,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:57:18,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242074774] [2020-11-30 01:57:18,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:57:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:57:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:57:18,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242074774] [2020-11-30 01:57:18,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:57:18,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:57:18,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309205520] [2020-11-30 01:57:18,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:57:18,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:57:18,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:57:18,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:57:18,182 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2020-11-30 01:57:18,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:57:18,320 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2020-11-30 01:57:18,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:57:18,321 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-30 01:57:18,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:57:18,322 INFO L225 Difference]: With dead ends: 18 [2020-11-30 01:57:18,322 INFO L226 Difference]: Without dead ends: 17 [2020-11-30 01:57:18,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:57:18,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-30 01:57:18,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-30 01:57:18,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-30 01:57:18,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-11-30 01:57:18,328 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2020-11-30 01:57:18,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:57:18,328 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-11-30 01:57:18,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:57:18,328 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-11-30 01:57:18,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 01:57:18,329 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:57:18,329 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:57:18,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 01:57:18,330 INFO L429 AbstractCegarLoop]: === Iteration 4 === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:57:18,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:57:18,331 INFO L82 PathProgramCache]: Analyzing trace with hash 2048642091, now seen corresponding path program 1 times [2020-11-30 01:57:18,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:57:18,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581076249] [2020-11-30 01:57:18,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:57:18,350 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:57:18,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1974119615] [2020-11-30 01:57:18,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a90aba4-cc09-4df0-aaec-035e63096bcd/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 [2020-11-30 01:57:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:57:18,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 01:57:18,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:57:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:57:18,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:57:18,712 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2020-11-30 01:57:21,705 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-11-30 01:57:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:57:21,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581076249] [2020-11-30 01:57:21,755 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:57:21,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974119615] [2020-11-30 01:57:21,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:57:21,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-11-30 01:57:21,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709267525] [2020-11-30 01:57:21,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 01:57:21,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:57:21,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 01:57:21,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2020-11-30 01:57:21,759 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 8 states. [2020-11-30 01:57:25,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:57:25,853 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-11-30 01:57:25,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:57:25,854 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-11-30 01:57:25,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:57:25,855 INFO L225 Difference]: With dead ends: 24 [2020-11-30 01:57:25,855 INFO L226 Difference]: Without dead ends: 23 [2020-11-30 01:57:25,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=35, Invalid=74, Unknown=1, NotChecked=0, Total=110 [2020-11-30 01:57:25,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-30 01:57:25,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-11-30 01:57:25,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-30 01:57:25,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-11-30 01:57:25,864 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-11-30 01:57:25,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:57:25,864 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-11-30 01:57:25,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 01:57:25,865 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-11-30 01:57:25,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 01:57:25,866 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:57:25,866 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:57:26,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:57:26,083 INFO L429 AbstractCegarLoop]: === Iteration 5 === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:57:26,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:57:26,084 INFO L82 PathProgramCache]: Analyzing trace with hash -916604565, now seen corresponding path program 1 times [2020-11-30 01:57:26,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:57:26,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621321473] [2020-11-30 01:57:26,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:57:26,101 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:57:26,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092548406] [2020-11-30 01:57:26,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a90aba4-cc09-4df0-aaec-035e63096bcd/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 [2020-11-30 01:57:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:57:26,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 01:57:26,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:57:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:57:26,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:57:28,701 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-11-30 01:57:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 01:57:31,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621321473] [2020-11-30 01:57:31,478 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:57:31,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092548406] [2020-11-30 01:57:31,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:57:31,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 12 [2020-11-30 01:57:31,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159998514] [2020-11-30 01:57:31,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 01:57:31,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:57:31,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 01:57:31,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=119, Unknown=2, NotChecked=0, Total=156 [2020-11-30 01:57:31,482 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 13 states. [2020-11-30 01:57:51,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:57:51,284 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-11-30 01:57:51,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 01:57:51,285 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-11-30 01:57:51,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:57:51,286 INFO L225 Difference]: With dead ends: 23 [2020-11-30 01:57:51,286 INFO L226 Difference]: Without dead ends: 22 [2020-11-30 01:57:51,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=83, Invalid=256, Unknown=3, NotChecked=0, Total=342 [2020-11-30 01:57:51,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-30 01:57:51,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-30 01:57:51,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-30 01:57:51,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-11-30 01:57:51,290 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2020-11-30 01:57:51,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:57:51,291 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-11-30 01:57:51,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 01:57:51,291 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-11-30 01:57:51,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-30 01:57:51,292 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:57:51,292 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:57:51,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:57:51,493 INFO L429 AbstractCegarLoop]: === Iteration 6 === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:57:51,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:57:51,496 INFO L82 PathProgramCache]: Analyzing trace with hash 2010559380, now seen corresponding path program 1 times [2020-11-30 01:57:51,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:57:51,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614157890] [2020-11-30 01:57:51,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:57:51,516 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:57:51,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454734692] [2020-11-30 01:57:51,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a90aba4-cc09-4df0-aaec-035e63096bcd/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 [2020-11-30 01:57:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:57:51,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 01:57:51,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:57:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-30 01:57:51,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:57:56,285 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-11-30 01:57:59,183 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-11-30 01:58:08,017 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-11-30 01:58:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-30 01:58:08,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614157890] [2020-11-30 01:58:08,413 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:58:08,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454734692] [2020-11-30 01:58:08,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1900945911] [2020-11-30 01:58:08,447 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-11-30 01:58:08,447 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:58:08,454 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:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) 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) [2020-11-30 01:58:08,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:58:08,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-11-30 01:58:08,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121605447] [2020-11-30 01:58:08,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-30 01:58:08,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:58:08,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-30 01:58:08,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=163, Unknown=2, NotChecked=0, Total=210 [2020-11-30 01:58:08,461 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 15 states. [2020-11-30 01:58:18,406 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2020-11-30 01:58:33,171 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-11-30 01:58:39,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:58:39,106 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-11-30 01:58:39,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 01:58:39,110 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-11-30 01:58:39,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:58:39,111 INFO L225 Difference]: With dead ends: 28 [2020-11-30 01:58:39,111 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 01:58:39,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=127, Invalid=374, Unknown=5, NotChecked=0, Total=506 [2020-11-30 01:58:39,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 01:58:39,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2020-11-30 01:58:39,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-30 01:58:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-11-30 01:58:39,117 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 33 [2020-11-30 01:58:39,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:58:39,118 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-11-30 01:58:39,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-30 01:58:39,118 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-11-30 01:58:39,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 01:58:39,119 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:58:39,119 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:58:39,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:58:39,324 INFO L429 AbstractCegarLoop]: === Iteration 7 === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:58:39,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:58:39,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1175573436, now seen corresponding path program 1 times [2020-11-30 01:58:39,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:58:39,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334246829] [2020-11-30 01:58:39,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:58:39,341 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 01:58:39,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15855567] [2020-11-30 01:58:39,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a90aba4-cc09-4df0-aaec-035e63096bcd/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 [2020-11-30 01:58:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:58:39,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-30 01:58:39,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:58:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 01:58:39,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:58:43,541 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-11-30 01:58:43,747 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-11-30 01:58:44,008 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-11-30 01:58:44,166 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-11-30 01:58:44,829 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-11-30 01:59:10,727 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-11-30 01:59:12,972 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_twoWay_~m~0_BEFORE_CALL_8 Int) (|v_twoWay_#t~ret2_AFTER_RETURN_6| Int) (|v_twoWay_#in~n_BEFORE_CALL_4| Int)) (or (< |v_twoWay_#t~ret2_AFTER_RETURN_6| |c_twoWay_#res|) (forall ((v_prenex_2 Int) (v_prenex_1 Int)) (or (< (* v_twoWay_~m~0_BEFORE_CALL_8 |v_twoWay_#t~ret2_AFTER_RETURN_6|) v_prenex_2) (<= 0 (+ (* v_prenex_2 v_prenex_1) 2147483648)) (< |v_twoWay_#in~n_BEFORE_CALL_4| v_prenex_1))) (< |c_twoWay_#in~n| v_twoWay_~m~0_BEFORE_CALL_8) (< v_twoWay_~m~0_BEFORE_CALL_8 0))) (forall ((v_twoWay_~m~0_BEFORE_CALL_8 Int) (|v_twoWay_#t~ret2_AFTER_RETURN_6| Int) (|v_twoWay_#in~n_BEFORE_CALL_4| Int)) (or (< |v_twoWay_#t~ret2_AFTER_RETURN_6| |c_twoWay_#res|) (forall ((v_prenex_2 Int) (v_prenex_1 Int)) (or (< (* v_twoWay_~m~0_BEFORE_CALL_8 |v_twoWay_#t~ret2_AFTER_RETURN_6|) v_prenex_2) (<= 0 (+ (* v_prenex_2 v_prenex_1) 2147483648)) (< |v_twoWay_#in~n_BEFORE_CALL_4| v_prenex_1))) (< |c_twoWay_#in~n| v_twoWay_~m~0_BEFORE_CALL_8) (exists ((v_twoWay_~m~0_BEFORE_CALL_7 Int) (|v_twoWay_#t~ret2_36| Int) (|v_twoWay_#t~ret2_AFTER_RETURN_5| Int)) (and (<= 1 |v_twoWay_#t~ret2_36|) (< (+ (* v_twoWay_~m~0_BEFORE_CALL_7 |v_twoWay_#t~ret2_AFTER_RETURN_5|) 2147483648) 0) (<= |v_twoWay_#t~ret2_AFTER_RETURN_5| (* |v_twoWay_#t~ret2_36| v_twoWay_~m~0_BEFORE_CALL_8)) (<= v_twoWay_~m~0_BEFORE_CALL_7 |v_twoWay_#in~n_BEFORE_CALL_4|)))))) is different from false [2020-11-30 01:59:13,183 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2020-11-30 01:59:15,275 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_2 Int) (v_twoWay_~m~0_BEFORE_CALL_8 Int) (|v_twoWay_#t~ret2_AFTER_RETURN_6| Int) (v_prenex_1 Int) (|v_twoWay_#in~n_BEFORE_CALL_4| Int)) (or (< (* v_twoWay_~m~0_BEFORE_CALL_8 |v_twoWay_#t~ret2_AFTER_RETURN_6|) v_prenex_2) (<= 0 (+ (* v_prenex_2 v_prenex_1) 2147483648)) (< |v_twoWay_#t~ret2_AFTER_RETURN_6| |c_twoWay_#res|) (< |v_twoWay_#in~n_BEFORE_CALL_4| v_prenex_1) (< |c_twoWay_#in~n| v_twoWay_~m~0_BEFORE_CALL_8) (exists ((v_twoWay_~m~0_BEFORE_CALL_7 Int) (|v_twoWay_#t~ret2_36| Int) (|v_twoWay_#t~ret2_AFTER_RETURN_5| Int)) (and (<= 1 |v_twoWay_#t~ret2_36|) (< (+ (* v_twoWay_~m~0_BEFORE_CALL_7 |v_twoWay_#t~ret2_AFTER_RETURN_5|) 2147483648) 0) (<= |v_twoWay_#t~ret2_AFTER_RETURN_5| (* |v_twoWay_#t~ret2_36| v_twoWay_~m~0_BEFORE_CALL_8)) (<= v_twoWay_~m~0_BEFORE_CALL_7 |v_twoWay_#in~n_BEFORE_CALL_4|))))) (< |c_twoWay_#in~n| 0)) is different from false [2020-11-30 01:59:17,292 WARN L860 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_2 Int) (v_twoWay_~m~0_BEFORE_CALL_8 Int) (|v_twoWay_#t~ret2_AFTER_RETURN_6| Int) (v_prenex_1 Int) (|v_twoWay_#in~n_BEFORE_CALL_4| Int)) (or (< (* v_twoWay_~m~0_BEFORE_CALL_8 |v_twoWay_#t~ret2_AFTER_RETURN_6|) v_prenex_2) (<= 0 (+ (* v_prenex_2 v_prenex_1) 2147483648)) (< |v_twoWay_#t~ret2_AFTER_RETURN_6| |c_twoWay_#res|) (< |v_twoWay_#in~n_BEFORE_CALL_4| v_prenex_1) (< |c_twoWay_#in~n| v_twoWay_~m~0_BEFORE_CALL_8) (exists ((v_twoWay_~m~0_BEFORE_CALL_7 Int) (|v_twoWay_#t~ret2_36| Int) (|v_twoWay_#t~ret2_AFTER_RETURN_5| Int)) (and (<= 1 |v_twoWay_#t~ret2_36|) (< (+ (* v_twoWay_~m~0_BEFORE_CALL_7 |v_twoWay_#t~ret2_AFTER_RETURN_5|) 2147483648) 0) (<= |v_twoWay_#t~ret2_AFTER_RETURN_5| (* |v_twoWay_#t~ret2_36| v_twoWay_~m~0_BEFORE_CALL_8)) (<= v_twoWay_~m~0_BEFORE_CALL_7 |v_twoWay_#in~n_BEFORE_CALL_4|))))) (< |c_twoWay_#in~n| 0)) is different from true [2020-11-30 01:59:17,395 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2020-11-30 01:59:36,231 WARN L193 SmtUtils]: Spent 14.08 s on a formula simplification. DAG size of input: 37 DAG size of output: 6 [2020-11-30 01:59:38,854 WARN L860 $PredicateComparison]: unable to prove that (forall ((v_twoWay_~m~0_BEFORE_CALL_7 Int) (|v_twoWay_#t~ret2_36| Int) (|v_twoWay_#t~ret2_AFTER_RETURN_5| Int) (v_twoWay_~m~0_38 Int)) (or (<= 0 (+ (* v_twoWay_~m~0_BEFORE_CALL_7 |v_twoWay_#t~ret2_AFTER_RETURN_5|) 2147483648)) (< (* |v_twoWay_#t~ret2_36| v_twoWay_~m~0_38) |v_twoWay_#t~ret2_AFTER_RETURN_5|) (< |c_twoWay_#in~n| v_twoWay_~m~0_BEFORE_CALL_7) (< |v_twoWay_#t~ret2_36| 1) (< (+ v_twoWay_~m~0_38 1) |c_twoWay_#t~post0|) (<= 0 v_twoWay_~m~0_38))) is different from true [2020-11-30 01:59:51,387 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification that was a NOOP. DAG size: 21 [2020-11-30 02:00:08,034 WARN L193 SmtUtils]: Spent 2.63 s on a formula simplification that was a NOOP. DAG size: 21 [2020-11-30 02:00:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2020-11-30 02:00:08,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334246829] [2020-11-30 02:00:08,082 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:00:08,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15855567] [2020-11-30 02:00:08,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [78163979] [2020-11-30 02:00:08,086 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-11-30 02:00:08,086 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:00:08,087 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:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) 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) [2020-11-30 02:00:08,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:00:08,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2020-11-30 02:00:08,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819579644] [2020-11-30 02:00:08,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-30 02:00:08,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:08,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-30 02:00:08,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=204, Unknown=20, NotChecked=96, Total=380 [2020-11-30 02:00:08,093 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 20 states. [2020-11-30 02:00:16,528 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_2 Int) (v_twoWay_~m~0_BEFORE_CALL_8 Int) (|v_twoWay_#t~ret2_AFTER_RETURN_6| Int) (v_prenex_1 Int) (|v_twoWay_#in~n_BEFORE_CALL_4| Int)) (or (< (* v_twoWay_~m~0_BEFORE_CALL_8 |v_twoWay_#t~ret2_AFTER_RETURN_6|) v_prenex_2) (<= 0 (+ (* v_prenex_2 v_prenex_1) 2147483648)) (< |v_twoWay_#t~ret2_AFTER_RETURN_6| |c_twoWay_#res|) (< |v_twoWay_#in~n_BEFORE_CALL_4| v_prenex_1) (< |c_twoWay_#in~n| v_twoWay_~m~0_BEFORE_CALL_8) (exists ((v_twoWay_~m~0_BEFORE_CALL_7 Int) (|v_twoWay_#t~ret2_36| Int) (|v_twoWay_#t~ret2_AFTER_RETURN_5| Int)) (and (<= 1 |v_twoWay_#t~ret2_36|) (< (+ (* v_twoWay_~m~0_BEFORE_CALL_7 |v_twoWay_#t~ret2_AFTER_RETURN_5|) 2147483648) 0) (<= |v_twoWay_#t~ret2_AFTER_RETURN_5| (* |v_twoWay_#t~ret2_36| v_twoWay_~m~0_BEFORE_CALL_8)) (<= v_twoWay_~m~0_BEFORE_CALL_7 |v_twoWay_#in~n_BEFORE_CALL_4|))))) (<= |c_twoWay_#in~n| c_twoWay_~n) (<= 1 |c_twoWay_#res|) (< |c_twoWay_#in~n| 0)) is different from false [2020-11-30 02:00:21,768 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_twoWay_~m~0_BEFORE_CALL_8 Int) (|v_twoWay_#t~ret2_AFTER_RETURN_6| Int) (|v_twoWay_#in~n_BEFORE_CALL_4| Int)) (or (< |v_twoWay_#t~ret2_AFTER_RETURN_6| |c_twoWay_#res|) (forall ((v_prenex_2 Int) (v_prenex_1 Int)) (or (< (* v_twoWay_~m~0_BEFORE_CALL_8 |v_twoWay_#t~ret2_AFTER_RETURN_6|) v_prenex_2) (<= 0 (+ (* v_prenex_2 v_prenex_1) 2147483648)) (< |v_twoWay_#in~n_BEFORE_CALL_4| v_prenex_1))) (< |c_twoWay_#in~n| v_twoWay_~m~0_BEFORE_CALL_8) (< v_twoWay_~m~0_BEFORE_CALL_8 0))) (forall ((v_twoWay_~m~0_BEFORE_CALL_8 Int) (|v_twoWay_#t~ret2_AFTER_RETURN_6| Int) (|v_twoWay_#in~n_BEFORE_CALL_4| Int)) (or (< |v_twoWay_#t~ret2_AFTER_RETURN_6| |c_twoWay_#res|) (forall ((v_prenex_2 Int) (v_prenex_1 Int)) (or (< (* v_twoWay_~m~0_BEFORE_CALL_8 |v_twoWay_#t~ret2_AFTER_RETURN_6|) v_prenex_2) (<= 0 (+ (* v_prenex_2 v_prenex_1) 2147483648)) (< |v_twoWay_#in~n_BEFORE_CALL_4| v_prenex_1))) (< |c_twoWay_#in~n| v_twoWay_~m~0_BEFORE_CALL_8) (exists ((v_twoWay_~m~0_BEFORE_CALL_7 Int) (|v_twoWay_#t~ret2_36| Int) (|v_twoWay_#t~ret2_AFTER_RETURN_5| Int)) (and (<= 1 |v_twoWay_#t~ret2_36|) (< (+ (* v_twoWay_~m~0_BEFORE_CALL_7 |v_twoWay_#t~ret2_AFTER_RETURN_5|) 2147483648) 0) (<= |v_twoWay_#t~ret2_AFTER_RETURN_5| (* |v_twoWay_#t~ret2_36| v_twoWay_~m~0_BEFORE_CALL_8)) (<= v_twoWay_~m~0_BEFORE_CALL_7 |v_twoWay_#in~n_BEFORE_CALL_4|))))) (<= 1 |c_twoWay_#res|) (< |c_twoWay_#in~n| 0)) is different from false [2020-11-30 02:01:04,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:01:04,089 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-11-30 02:01:04,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 02:01:04,123 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-11-30 02:01:04,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:01:04,124 INFO L225 Difference]: With dead ends: 27 [2020-11-30 02:01:04,124 INFO L226 Difference]: Without dead ends: 26 [2020-11-30 02:01:04,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 102.2s TimeCoverageRelationStatistics Valid=122, Invalid=379, Unknown=25, NotChecked=230, Total=756 [2020-11-30 02:01:04,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-30 02:01:04,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-30 02:01:04,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-30 02:01:04,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-11-30 02:01:04,132 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 28 [2020-11-30 02:01:04,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:01:04,133 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-11-30 02:01:04,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-30 02:01:04,133 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-11-30 02:01:04,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-30 02:01:04,135 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:01:04,135 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-11-30 02:01:04,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:01:04,347 INFO L429 AbstractCegarLoop]: === Iteration 8 === [twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 02:01:04,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:01:04,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1355949953, now seen corresponding path program 2 times [2020-11-30 02:01:04,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:01:04,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805630342] [2020-11-30 02:01:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:01:04,365 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:01:04,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552740603] [2020-11-30 02:01:04,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a90aba4-cc09-4df0-aaec-035e63096bcd/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:01:13,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-30 02:01:13,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:01:13,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-30 02:01:13,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:01:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-30 02:01:13,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:01:14,106 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-30 02:01:14,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805630342] [2020-11-30 02:01:14,106 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:01:14,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552740603] [2020-11-30 02:01:14,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [148309098] [2020-11-30 02:01:14,108 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-11-30 02:01:14,109 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:01:14,109 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:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) 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) [2020-11-30 02:01:14,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:01:14,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 3] total 13 [2020-11-30 02:01:14,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553499928] [2020-11-30 02:01:14,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 02:01:14,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:01:14,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 02:01:14,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-11-30 02:01:14,111 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2020-11-30 02:01:14,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:01:14,117 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-11-30 02:01:14,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 02:01:14,117 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-11-30 02:01:14,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:01:14,118 INFO L225 Difference]: With dead ends: 26 [2020-11-30 02:01:14,118 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 02:01:14,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-11-30 02:01:14,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 02:01:14,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 02:01:14,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 02:01:14,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 02:01:14,119 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2020-11-30 02:01:14,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:01:14,121 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 02:01:14,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 02:01:14,122 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 02:01:14,122 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 02:01:14,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:01:14,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 02:01:14,382 INFO L274 CegarLoopResult]: For program point L31(lines 31 35) no Hoare annotation was computed. [2020-11-30 02:01:14,382 INFO L277 CegarLoopResult]: At program point L31-2(lines 31 35) the Hoare annotation is: true [2020-11-30 02:01:14,382 INFO L274 CegarLoopResult]: For program point L27(lines 27 37) no Hoare annotation was computed. [2020-11-30 02:01:14,382 INFO L274 CegarLoopResult]: For program point twoWayErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 32) no Hoare annotation was computed. [2020-11-30 02:01:14,383 INFO L274 CegarLoopResult]: For program point twoWayFINAL(lines 26 38) no Hoare annotation was computed. [2020-11-30 02:01:14,383 INFO L274 CegarLoopResult]: For program point twoWayErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 34) no Hoare annotation was computed. [2020-11-30 02:01:14,383 INFO L274 CegarLoopResult]: For program point twoWayErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 36) no Hoare annotation was computed. [2020-11-30 02:01:14,383 INFO L274 CegarLoopResult]: For program point L36(line 36) no Hoare annotation was computed. [2020-11-30 02:01:14,383 INFO L274 CegarLoopResult]: For program point L36-1(line 36) no Hoare annotation was computed. [2020-11-30 02:01:14,383 INFO L274 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-11-30 02:01:14,383 INFO L274 CegarLoopResult]: For program point L36-2(line 36) no Hoare annotation was computed. [2020-11-30 02:01:14,383 INFO L274 CegarLoopResult]: For program point L34-1(line 34) no Hoare annotation was computed. [2020-11-30 02:01:14,383 INFO L274 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-11-30 02:01:14,383 INFO L274 CegarLoopResult]: For program point L32-1(line 32) no Hoare annotation was computed. [2020-11-30 02:01:14,384 INFO L277 CegarLoopResult]: At program point twoWayENTRY(lines 26 38) the Hoare annotation is: true [2020-11-30 02:01:14,384 INFO L274 CegarLoopResult]: For program point twoWayErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 32) no Hoare annotation was computed. [2020-11-30 02:01:14,384 INFO L274 CegarLoopResult]: For program point twoWayErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 36) no Hoare annotation was computed. [2020-11-30 02:01:14,384 INFO L274 CegarLoopResult]: For program point twoWayErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 34) no Hoare annotation was computed. [2020-11-30 02:01:14,384 INFO L274 CegarLoopResult]: For program point twoWayEXIT(lines 26 38) no Hoare annotation was computed. [2020-11-30 02:01:14,384 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 02:01:14,384 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 02:01:14,384 INFO L270 CegarLoopResult]: At program point L48(line 48) the Hoare annotation is: false [2020-11-30 02:01:14,384 INFO L274 CegarLoopResult]: For program point L48-1(line 48) no Hoare annotation was computed. [2020-11-30 02:01:14,384 INFO L274 CegarLoopResult]: For program point L45(lines 45 46) no Hoare annotation was computed. [2020-11-30 02:01:14,385 INFO L274 CegarLoopResult]: For program point L42(lines 42 43) no Hoare annotation was computed. [2020-11-30 02:01:14,385 INFO L270 CegarLoopResult]: At program point L40(lines 40 50) the Hoare annotation is: (<= ULTIMATE.start_main_~x~0 2147483647) [2020-11-30 02:01:14,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:01:14 BoogieIcfgContainer [2020-11-30 02:01:14,402 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:01:14,402 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:01:14,402 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:01:14,403 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:01:14,403 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:57:16" (3/4) ... [2020-11-30 02:01:14,406 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 02:01:14,412 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure twoWay [2020-11-30 02:01:14,418 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-11-30 02:01:14,418 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-30 02:01:14,468 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2a90aba4-cc09-4df0-aaec-035e63096bcd/bin/utaipan/witness.graphml [2020-11-30 02:01:14,470 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:01:14,471 INFO L168 Benchmark]: Toolchain (without parser) took 238420.22 ms. Allocated memory was 81.8 MB in the beginning and 119.5 MB in the end (delta: 37.7 MB). Free memory was 52.2 MB in the beginning and 34.8 MB in the end (delta: 17.4 MB). Peak memory consumption was 55.4 MB. Max. memory is 16.1 GB. [2020-11-30 02:01:14,472 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 81.8 MB. Free memory is still 37.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:01:14,473 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.41 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 52.2 MB in the beginning and 77.3 MB in the end (delta: -25.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 02:01:14,473 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.98 ms. Allocated memory is still 98.6 MB. Free memory was 77.3 MB in the beginning and 76.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:01:14,475 INFO L168 Benchmark]: Boogie Preprocessor took 21.84 ms. Allocated memory is still 98.6 MB. Free memory was 76.0 MB in the beginning and 75.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:01:14,476 INFO L168 Benchmark]: RCFGBuilder took 432.84 ms. Allocated memory is still 98.6 MB. Free memory was 75.0 MB in the beginning and 63.8 MB in the end (delta: 11.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 02:01:14,479 INFO L168 Benchmark]: TraceAbstraction took 237571.35 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 63.4 MB in the beginning and 36.9 MB in the end (delta: 26.5 MB). Peak memory consumption was 49.6 MB. Max. memory is 16.1 GB. [2020-11-30 02:01:14,480 INFO L168 Benchmark]: Witness Printer took 67.79 ms. Allocated memory is still 119.5 MB. Free memory was 36.9 MB in the beginning and 34.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:01:14,483 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 81.8 MB. Free memory is still 37.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 288.41 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 52.2 MB in the beginning and 77.3 MB in the end (delta: -25.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.98 ms. Allocated memory is still 98.6 MB. Free memory was 77.3 MB in the beginning and 76.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.84 ms. Allocated memory is still 98.6 MB. Free memory was 76.0 MB in the beginning and 75.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 432.84 ms. Allocated memory is still 98.6 MB. Free memory was 75.0 MB in the beginning and 63.8 MB in the end (delta: 11.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 237571.35 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 63.4 MB in the beginning and 36.9 MB in the end (delta: 26.5 MB). Peak memory consumption was 49.6 MB. Max. memory is 16.1 GB. * Witness Printer took 67.79 ms. Allocated memory is still 119.5 MB. Free memory was 36.9 MB in the beginning and 34.8 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: - PositiveResult [Line: 32]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 36]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 32]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 34]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 34]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 36]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: x <= 2147483647 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 26 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 237.4s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 111.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 91 SDtfs, 242 SDslu, 267 SDs, 0 SdLazy, 365 SolverSat, 78 SolverUnsat, 22 SolverUnknown, 0 SolverNotchecked, 69.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 299 GetRequests, 194 SyntacticMatches, 7 SemanticMatches, 98 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 145.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=1, 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, 8 MinimizatonAttempts, 22 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 10 PreInvPairs, 10 NumberOfFragments, 6 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 9.0s SatisfiabilityAnalysisTime, 115.2s InterpolantComputationTime, 158 NumberOfCodeBlocks, 152 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 278 ConstructedInterpolants, 34 QuantifiedInterpolants, 36238 SizeOfPredicates, 22 NumberOfNonLiveVariables, 394 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 121/172 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 correct! Received shutdown request...