./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/AliasDarteFeautrierGonnord-SAS2010-speedpldi3.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_79027ac1-e493-4294-9da5-8ba59997fdb0/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_79027ac1-e493-4294-9da5-8ba59997fdb0/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_79027ac1-e493-4294-9da5-8ba59997fdb0/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_79027ac1-e493-4294-9da5-8ba59997fdb0/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/AliasDarteFeautrierGonnord-SAS2010-speedpldi3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_79027ac1-e493-4294-9da5-8ba59997fdb0/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_79027ac1-e493-4294-9da5-8ba59997fdb0/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 500cb8735f650eb0e7c33062ddc23c2166b17f19 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:04:56,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:04:56,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:04:56,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:04:56,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:04:56,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:04:56,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:04:56,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:04:56,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:04:56,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:04:56,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:04:56,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:04:56,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:04:56,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:04:56,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:04:56,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:04:56,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:04:56,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:04:56,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:04:56,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:04:56,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:04:56,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:04:56,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:04:56,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:04:56,409 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:04:56,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:04:56,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:04:56,412 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:04:56,412 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:04:56,413 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:04:56,414 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:04:56,415 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:04:56,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:04:56,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:04:56,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:04:56,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:04:56,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:04:56,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:04:56,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:04:56,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:04:56,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:04:56,425 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_79027ac1-e493-4294-9da5-8ba59997fdb0/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-11-22 13:04:56,471 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:04:56,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:04:56,472 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:04:56,473 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:04:56,473 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:04:56,473 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:04:56,473 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:04:56,474 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:04:56,474 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:04:56,474 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:04:56,475 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:04:56,476 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:04:56,476 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:04:56,476 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:04:56,477 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:04:56,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:04:56,478 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 13:04:56,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:04:56,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:04:56,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:04:56,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:04:56,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:04:56,479 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-22 13:04:56,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:04:56,479 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:04:56,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:04:56,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:04:56,480 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:04:56,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:04:56,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:04:56,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:04:56,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:04:56,483 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:04:56,484 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:04:56,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:04:56,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:04:56,484 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:04:56,485 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:04:56,485 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_79027ac1-e493-4294-9da5-8ba59997fdb0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_79027ac1-e493-4294-9da5-8ba59997fdb0/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 500cb8735f650eb0e7c33062ddc23c2166b17f19 [2020-11-22 13:04:56,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:04:56,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:04:56,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:04:56,798 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:04:56,799 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:04:56,800 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_79027ac1-e493-4294-9da5-8ba59997fdb0/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/AliasDarteFeautrierGonnord-SAS2010-speedpldi3.c [2020-11-22 13:04:56,882 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_79027ac1-e493-4294-9da5-8ba59997fdb0/bin/utaipan/data/7580b4fa0/2afa7fcdf0074d37890f8320bb984a4d/FLAG9df9c72aa [2020-11-22 13:04:57,415 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:04:57,415 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_79027ac1-e493-4294-9da5-8ba59997fdb0/sv-benchmarks/c/termination-crafted-lit/AliasDarteFeautrierGonnord-SAS2010-speedpldi3.c [2020-11-22 13:04:57,425 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_79027ac1-e493-4294-9da5-8ba59997fdb0/bin/utaipan/data/7580b4fa0/2afa7fcdf0074d37890f8320bb984a4d/FLAG9df9c72aa [2020-11-22 13:04:57,781 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_79027ac1-e493-4294-9da5-8ba59997fdb0/bin/utaipan/data/7580b4fa0/2afa7fcdf0074d37890f8320bb984a4d [2020-11-22 13:04:57,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:04:57,785 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:04:57,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:04:57,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:04:57,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:04:57,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:04:57" (1/1) ... [2020-11-22 13:04:57,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5913631e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:57, skipping insertion in model container [2020-11-22 13:04:57,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:04:57" (1/1) ... [2020-11-22 13:04:57,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:04:57,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:04:57,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:04:57,994 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:04:58,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:04:58,052 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:04:58,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:58 WrapperNode [2020-11-22 13:04:58,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:04:58,068 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:04:58,068 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:04:58,068 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:04:58,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:58" (1/1) ... [2020-11-22 13:04:58,084 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:58" (1/1) ... [2020-11-22 13:04:58,104 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:04:58,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:04:58,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:04:58,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:04:58,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:58" (1/1) ... [2020-11-22 13:04:58,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:58" (1/1) ... [2020-11-22 13:04:58,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:58" (1/1) ... [2020-11-22 13:04:58,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:58" (1/1) ... [2020-11-22 13:04:58,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:58" (1/1) ... [2020-11-22 13:04:58,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:58" (1/1) ... [2020-11-22 13:04:58,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:58" (1/1) ... [2020-11-22 13:04:58,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:04:58,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:04:58,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:04:58,133 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:04:58,134 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79027ac1-e493-4294-9da5-8ba59997fdb0/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 [2020-11-22 13:04:58,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:04:58,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:04:58,538 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:04:58,538 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-22 13:04:58,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:04:58 BoogieIcfgContainer [2020-11-22 13:04:58,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:04:58,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:04:58,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:04:58,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:04:58,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:04:57" (1/3) ... [2020-11-22 13:04:58,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d0c53ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:04:58, skipping insertion in model container [2020-11-22 13:04:58,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:58" (2/3) ... [2020-11-22 13:04:58,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d0c53ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:04:58, skipping insertion in model container [2020-11-22 13:04:58,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:04:58" (3/3) ... [2020-11-22 13:04:58,550 INFO L111 eAbstractionObserver]: Analyzing ICFG AliasDarteFeautrierGonnord-SAS2010-speedpldi3.c [2020-11-22 13:04:58,561 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:04:58,564 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-22 13:04:58,575 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-22 13:04:58,607 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:04:58,607 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:04:58,607 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:04:58,607 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:04:58,607 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:04:58,608 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:04:58,608 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:04:58,608 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:04:58,623 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-11-22 13:04:58,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 13:04:58,629 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:58,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 13:04:58,630 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:04:58,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:04:58,637 INFO L82 PathProgramCache]: Analyzing trace with hash 29684842, now seen corresponding path program 1 times [2020-11-22 13:04:58,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:04:58,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986803731] [2020-11-22 13:04:58,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:04:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:04:58,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:04:58,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986803731] [2020-11-22 13:04:58,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:04:58,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:04:58,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765550434] [2020-11-22 13:04:58,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:04:58,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:04:58,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:04:58,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:04:58,822 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2020-11-22 13:04:58,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:04:58,904 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2020-11-22 13:04:58,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:04:58,906 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-22 13:04:58,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:04:58,914 INFO L225 Difference]: With dead ends: 21 [2020-11-22 13:04:58,914 INFO L226 Difference]: Without dead ends: 16 [2020-11-22 13:04:58,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:04:58,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-22 13:04:58,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-11-22 13:04:58,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-22 13:04:58,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-11-22 13:04:58,961 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 5 [2020-11-22 13:04:58,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:04:58,962 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-11-22 13:04:58,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:04:58,962 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-11-22 13:04:58,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 13:04:58,963 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:58,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 13:04:58,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:04:58,964 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:04:58,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:04:58,967 INFO L82 PathProgramCache]: Analyzing trace with hash 29685034, now seen corresponding path program 1 times [2020-11-22 13:04:58,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:04:58,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869796457] [2020-11-22 13:04:58,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:04:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:04:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:04:59,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869796457] [2020-11-22 13:04:59,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:04:59,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:04:59,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639898939] [2020-11-22 13:04:59,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:04:59,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:04:59,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:04:59,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:04:59,015 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2020-11-22 13:04:59,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:04:59,050 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-11-22 13:04:59,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:04:59,051 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-22 13:04:59,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:04:59,052 INFO L225 Difference]: With dead ends: 30 [2020-11-22 13:04:59,052 INFO L226 Difference]: Without dead ends: 17 [2020-11-22 13:04:59,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:04:59,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-22 13:04:59,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-22 13:04:59,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-22 13:04:59,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-11-22 13:04:59,056 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 5 [2020-11-22 13:04:59,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:04:59,057 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-11-22 13:04:59,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:04:59,057 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-11-22 13:04:59,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:04:59,058 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:59,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 13:04:59,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:04:59,059 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:04:59,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:04:59,059 INFO L82 PathProgramCache]: Analyzing trace with hash 920230152, now seen corresponding path program 1 times [2020-11-22 13:04:59,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:04:59,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639441583] [2020-11-22 13:04:59,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:04:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:04:59,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:04:59,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639441583] [2020-11-22 13:04:59,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:04:59,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:04:59,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430198234] [2020-11-22 13:04:59,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:04:59,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:04:59,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:04:59,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:04:59,092 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2020-11-22 13:04:59,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:04:59,120 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2020-11-22 13:04:59,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:04:59,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-22 13:04:59,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:04:59,123 INFO L225 Difference]: With dead ends: 17 [2020-11-22 13:04:59,123 INFO L226 Difference]: Without dead ends: 16 [2020-11-22 13:04:59,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:04:59,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-22 13:04:59,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-22 13:04:59,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-22 13:04:59,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-11-22 13:04:59,129 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 6 [2020-11-22 13:04:59,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:04:59,129 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-11-22 13:04:59,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:04:59,130 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-11-22 13:04:59,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 13:04:59,130 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:59,130 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2020-11-22 13:04:59,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:04:59,130 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:04:59,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:04:59,131 INFO L82 PathProgramCache]: Analyzing trace with hash -199749339, now seen corresponding path program 1 times [2020-11-22 13:04:59,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:04:59,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570401237] [2020-11-22 13:04:59,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:04:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:04:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:04:59,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570401237] [2020-11-22 13:04:59,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060083841] [2020-11-22 13:04:59,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79027ac1-e493-4294-9da5-8ba59997fdb0/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 [2020-11-22 13:04:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:04:59,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-22 13:04:59,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:04:59,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:04:59,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:04:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:04:59,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [694339251] [2020-11-22 13:04:59,347 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-22 13:04:59,347 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:04:59,352 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:04:59,357 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:04:59,358 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:04:59,616 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:04:59,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:04:59,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2020-11-22 13:04:59,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446954532] [2020-11-22 13:04:59,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:04:59,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:04:59,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:04:59,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-11-22 13:04:59,877 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-11-22 13:04:59,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:04:59,979 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-11-22 13:04:59,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:04:59,979 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-11-22 13:04:59,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:04:59,980 INFO L225 Difference]: With dead ends: 26 [2020-11-22 13:04:59,980 INFO L226 Difference]: Without dead ends: 23 [2020-11-22 13:04:59,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-11-22 13:04:59,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-22 13:04:59,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-11-22 13:04:59,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-22 13:04:59,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-11-22 13:04:59,988 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 9 [2020-11-22 13:04:59,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:04:59,989 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-11-22 13:04:59,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:04:59,990 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-11-22 13:04:59,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 13:04:59,990 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:59,991 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:00,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:05:00,191 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:05:00,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:00,192 INFO L82 PathProgramCache]: Analyzing trace with hash 610055194, now seen corresponding path program 1 times [2020-11-22 13:05:00,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:00,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668024457] [2020-11-22 13:05:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 13:05:00,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668024457] [2020-11-22 13:05:00,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821796759] [2020-11-22 13:05:00,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79027ac1-e493-4294-9da5-8ba59997fdb0/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 [2020-11-22 13:05:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:00,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-22 13:05:00,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:05:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 13:05:00,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:05:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 13:05:00,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1344794115] [2020-11-22 13:05:00,332 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-22 13:05:00,332 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:05:00,333 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:05:00,333 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:05:00,333 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:05:00,606 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) 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) [2020-11-22 13:05:00,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:05:00,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2020-11-22 13:05:00,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865499729] [2020-11-22 13:05:00,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 13:05:00,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:00,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 13:05:00,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:05:00,609 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 8 states. [2020-11-22 13:05:00,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:00,873 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2020-11-22 13:05:00,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-22 13:05:00,874 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-11-22 13:05:00,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:00,875 INFO L225 Difference]: With dead ends: 63 [2020-11-22 13:05:00,875 INFO L226 Difference]: Without dead ends: 51 [2020-11-22 13:05:00,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-11-22 13:05:00,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-22 13:05:00,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-11-22 13:05:00,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-22 13:05:00,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-11-22 13:05:00,886 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 13 [2020-11-22 13:05:00,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:00,886 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-11-22 13:05:00,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 13:05:00,886 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-11-22 13:05:00,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-22 13:05:00,887 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:00,887 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:01,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-22 13:05:01,105 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:05:01,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:01,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1977014293, now seen corresponding path program 1 times [2020-11-22 13:05:01,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:01,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495419925] [2020-11-22 13:05:01,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 13:05:01,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495419925] [2020-11-22 13:05:01,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079968019] [2020-11-22 13:05:01,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79027ac1-e493-4294-9da5-8ba59997fdb0/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 [2020-11-22 13:05:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:01,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-22 13:05:01,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:05:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 13:05:01,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:05:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 13:05:01,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2042490643] [2020-11-22 13:05:01,214 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-22 13:05:01,215 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:05:01,215 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:05:01,215 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:05:01,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:05:01,425 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) 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) [2020-11-22 13:05:01,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:05:01,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2020-11-22 13:05:01,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450823144] [2020-11-22 13:05:01,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:05:01,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:01,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:05:01,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:05:01,427 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 6 states. [2020-11-22 13:05:01,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:01,482 INFO L93 Difference]: Finished difference Result 110 states and 146 transitions. [2020-11-22 13:05:01,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:05:01,483 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-11-22 13:05:01,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:01,486 INFO L225 Difference]: With dead ends: 110 [2020-11-22 13:05:01,486 INFO L226 Difference]: Without dead ends: 109 [2020-11-22 13:05:01,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:05:01,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-22 13:05:01,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2020-11-22 13:05:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-22 13:05:01,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2020-11-22 13:05:01,508 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 17 [2020-11-22 13:05:01,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:01,509 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2020-11-22 13:05:01,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:05:01,509 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2020-11-22 13:05:01,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-22 13:05:01,510 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:01,510 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-11-22 13:05:01,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:05:01,723 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:05:01,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:01,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1157906947, now seen corresponding path program 1 times [2020-11-22 13:05:01,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:01,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718868381] [2020-11-22 13:05:01,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-22 13:05:01,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718868381] [2020-11-22 13:05:01,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:01,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:05:01,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004848653] [2020-11-22 13:05:01,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:05:01,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:01,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:05:01,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:01,765 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand 4 states. [2020-11-22 13:05:01,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:01,800 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2020-11-22 13:05:01,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:05:01,801 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-11-22 13:05:01,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:01,802 INFO L225 Difference]: With dead ends: 96 [2020-11-22 13:05:01,802 INFO L226 Difference]: Without dead ends: 95 [2020-11-22 13:05:01,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:01,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-11-22 13:05:01,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-11-22 13:05:01,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-22 13:05:01,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2020-11-22 13:05:01,816 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 18 [2020-11-22 13:05:01,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:01,817 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2020-11-22 13:05:01,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:05:01,817 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2020-11-22 13:05:01,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-22 13:05:01,819 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:01,819 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:01,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2020-11-22 13:05:01,819 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:05:01,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:01,820 INFO L82 PathProgramCache]: Analyzing trace with hash 907494726, now seen corresponding path program 2 times [2020-11-22 13:05:01,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:01,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854833760] [2020-11-22 13:05:01,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:01,946 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 42 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 13:05:01,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854833760] [2020-11-22 13:05:01,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860073455] [2020-11-22 13:05:01,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79027ac1-e493-4294-9da5-8ba59997fdb0/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-22 13:05:01,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-22 13:05:01,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 13:05:01,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-22 13:05:01,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:05:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-11-22 13:05:02,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:05:02,066 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-11-22 13:05:02,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1790185534] [2020-11-22 13:05:02,068 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-22 13:05:02,068 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:05:02,069 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:05:02,069 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:05:02,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:05:02,278 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) 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) [2020-11-22 13:05:02,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:05:02,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3, 3] total 14 [2020-11-22 13:05:02,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95843186] [2020-11-22 13:05:02,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-22 13:05:02,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:02,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-22 13:05:02,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-11-22 13:05:02,280 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand 14 states. [2020-11-22 13:05:02,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:02,501 INFO L93 Difference]: Finished difference Result 215 states and 260 transitions. [2020-11-22 13:05:02,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-22 13:05:02,504 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-11-22 13:05:02,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:02,507 INFO L225 Difference]: With dead ends: 215 [2020-11-22 13:05:02,507 INFO L226 Difference]: Without dead ends: 136 [2020-11-22 13:05:02,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2020-11-22 13:05:02,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-11-22 13:05:02,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 95. [2020-11-22 13:05:02,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-22 13:05:02,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2020-11-22 13:05:02,534 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 29 [2020-11-22 13:05:02,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:02,535 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2020-11-22 13:05:02,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-22 13:05:02,535 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2020-11-22 13:05:02,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-22 13:05:02,536 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:02,536 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 5, 5, 5, 4, 4, 1, 1, 1] [2020-11-22 13:05:02,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:05:02,757 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:05:02,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:02,758 INFO L82 PathProgramCache]: Analyzing trace with hash 2128580005, now seen corresponding path program 2 times [2020-11-22 13:05:02,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:02,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713791273] [2020-11-22 13:05:02,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-11-22 13:05:02,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713791273] [2020-11-22 13:05:02,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241698800] [2020-11-22 13:05:02,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_79027ac1-e493-4294-9da5-8ba59997fdb0/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 [2020-11-22 13:05:02,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-22 13:05:02,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 13:05:02,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-22 13:05:02,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:05:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-11-22 13:05:02,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:05:02,906 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-11-22 13:05:02,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1405881146] [2020-11-22 13:05:02,911 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-22 13:05:02,911 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:05:02,911 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:05:02,911 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:05:02,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:05:03,058 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) 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) [2020-11-22 13:05:03,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:05:03,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2020-11-22 13:05:03,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960367338] [2020-11-22 13:05:03,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:05:03,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:03,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:05:03,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:03,060 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand 4 states. [2020-11-22 13:05:03,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:03,079 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2020-11-22 13:05:03,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:05:03,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-11-22 13:05:03,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:03,080 INFO L225 Difference]: With dead ends: 95 [2020-11-22 13:05:03,080 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:05:03,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:05:03,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:05:03,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:05:03,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:05:03,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:05:03,081 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-11-22 13:05:03,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:03,082 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:05:03,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:05:03,082 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:05:03,082 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:05:03,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-11-22 13:05:03,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 13:05:03,570 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 26 [2020-11-22 13:05:03,572 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2020-11-22 13:05:03,573 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 13:05:03,573 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2020-11-22 13:05:03,573 INFO L274 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-11-22 13:05:03,573 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-11-22 13:05:03,573 INFO L274 CegarLoopResult]: For program point L21(lines 21 26) no Hoare annotation was computed. [2020-11-22 13:05:03,573 INFO L270 CegarLoopResult]: At program point L21-2(lines 20 27) the Hoare annotation is: (let ((.cse0 (<= 0 (+ ULTIMATE.start_main_~n~0 2147483648))) (.cse4 (<= 1 ULTIMATE.start_main_~i~0)) (.cse1 (< ULTIMATE.start_main_~m~0 2147483647)) (.cse2 (<= 0 ULTIMATE.start_main_~j~0)) (.cse3 (<= ULTIMATE.start_main_~n~0 2147483647)) (.cse5 (<= 1 ULTIMATE.start_main_~m~0)) (.cse6 (<= ULTIMATE.start_main_~j~0 2147483646))) (or (and .cse0 .cse1 .cse2 (<= ULTIMATE.start_main_~j~0 0) .cse3 .cse4 .cse5) (and .cse0 .cse1 .cse2 (<= ULTIMATE.start_main_~i~0 2147483646) .cse3 .cse4 .cse5 .cse6) (and .cse1 .cse2 (= ULTIMATE.start_main_~i~0 0) (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0) .cse3 .cse5 .cse6))) [2020-11-22 13:05:03,573 INFO L274 CegarLoopResult]: For program point L17(lines 17 28) no Hoare annotation was computed. [2020-11-22 13:05:03,573 INFO L277 CegarLoopResult]: At program point L17-1(lines 17 28) the Hoare annotation is: true [2020-11-22 13:05:03,574 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2020-11-22 13:05:03,574 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2020-11-22 13:05:03,574 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 13:05:03,574 INFO L274 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-11-22 13:05:03,574 INFO L274 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-11-22 13:05:03,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:05:03 BoogieIcfgContainer [2020-11-22 13:05:03,600 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:05:03,601 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:05:03,601 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:05:03,601 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:05:03,602 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:04:58" (3/4) ... [2020-11-22 13:05:03,605 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:05:03,613 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-22 13:05:03,614 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-22 13:05:03,614 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:05:03,654 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_79027ac1-e493-4294-9da5-8ba59997fdb0/bin/utaipan/witness.graphml [2020-11-22 13:05:03,654 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:05:03,658 INFO L168 Benchmark]: Toolchain (without parser) took 5869.92 ms. Allocated memory was 92.3 MB in the beginning and 138.4 MB in the end (delta: 46.1 MB). Free memory was 62.0 MB in the beginning and 88.7 MB in the end (delta: -26.7 MB). Peak memory consumption was 20.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:03,658 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 92.3 MB. Free memory is still 50.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:05:03,659 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.41 ms. Allocated memory is still 92.3 MB. Free memory was 61.9 MB in the beginning and 71.3 MB in the end (delta: -9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:03,659 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.67 ms. Allocated memory is still 92.3 MB. Free memory was 71.3 MB in the beginning and 69.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:05:03,663 INFO L168 Benchmark]: Boogie Preprocessor took 26.10 ms. Allocated memory is still 92.3 MB. Free memory was 69.9 MB in the beginning and 69.0 MB in the end (delta: 842.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:05:03,664 INFO L168 Benchmark]: RCFGBuilder took 406.79 ms. Allocated memory is still 92.3 MB. Free memory was 69.0 MB in the beginning and 58.8 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:03,664 INFO L168 Benchmark]: TraceAbstraction took 5058.04 ms. Allocated memory was 92.3 MB in the beginning and 138.4 MB in the end (delta: 46.1 MB). Free memory was 58.1 MB in the beginning and 90.8 MB in the end (delta: -32.7 MB). Peak memory consumption was 67.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:03,665 INFO L168 Benchmark]: Witness Printer took 53.37 ms. Allocated memory is still 138.4 MB. Free memory was 90.8 MB in the beginning and 88.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:03,667 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 92.3 MB. Free memory is still 50.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 280.41 ms. Allocated memory is still 92.3 MB. Free memory was 61.9 MB in the beginning and 71.3 MB in the end (delta: -9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.67 ms. Allocated memory is still 92.3 MB. Free memory was 71.3 MB in the beginning and 69.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.10 ms. Allocated memory is still 92.3 MB. Free memory was 69.9 MB in the beginning and 69.0 MB in the end (delta: 842.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 406.79 ms. Allocated memory is still 92.3 MB. Free memory was 69.0 MB in the beginning and 58.8 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5058.04 ms. Allocated memory was 92.3 MB in the beginning and 138.4 MB in the end (delta: 46.1 MB). Free memory was 58.1 MB in the beginning and 90.8 MB in the end (delta: -32.7 MB). Peak memory consumption was 67.4 MB. Max. memory is 16.1 GB. * Witness Printer took 53.37 ms. Allocated memory is still 138.4 MB. Free memory was 90.8 MB in the beginning and 88.7 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: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 22]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 22]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (((((((0 <= n + 2147483648 && m < 2147483647) && 0 <= j) && j <= 0) && n <= 2147483647) && 1 <= i) && 1 <= m) || (((((((0 <= n + 2147483648 && m < 2147483647) && 0 <= j) && i <= 2147483646) && n <= 2147483647) && 1 <= i) && 1 <= m) && j <= 2147483646)) || ((((((m < 2147483647 && 0 <= j) && i == 0) && i < n) && n <= 2147483647) && 1 <= m) && j <= 2147483646) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.6s, OverallIterations: 9, TraceHistogramMax: 10, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 62 SDtfs, 197 SDslu, 23 SDs, 0 SdLazy, 169 SolverSat, 83 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 264 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 59 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 24 NumberOfFragments, 75 HoareAnnotationTreeSize, 2 FomulaSimplifications, 914 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 297 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 252 NumberOfCodeBlocks, 192 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 342 ConstructedInterpolants, 0 QuantifiedInterpolants, 26234 SizeOfPredicates, 6 NumberOfNonLiveVariables, 139 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 19 InterpolantComputations, 4 PerfectInterpolantSequences, 544/673 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: OVERALL_TIME[ms]: 269, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 5, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 18, TOOLS_POST_TIME[ms]: 15, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 18, TOOLS_QUANTIFIERELIM_TIME[ms]: 9, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 3, FLUID_QUERY_TIME[ms]: 4, FLUID_QUERIES: 33, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME[ms]: 0, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 181, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 19, DOMAIN_ISBOTTOM_APPLICATIONS: 5, DOMAIN_ISBOTTOM_TIME[ms]: 9, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 215, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 214, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 3, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 9, DAG_COMPRESSION_PROCESSED_NODES: 43, DAG_COMPRESSION_RETAINED_NODES: 23, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...