./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NonTermination4.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_1574bcf5-0c7d-4575-9aa3-f646f8f9638f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1574bcf5-0c7d-4575-9aa3-f646f8f9638f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1574bcf5-0c7d-4575-9aa3-f646f8f9638f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1574bcf5-0c7d-4575-9aa3-f646f8f9638f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/NonTermination4.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1574bcf5-0c7d-4575-9aa3-f646f8f9638f/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1574bcf5-0c7d-4575-9aa3-f646f8f9638f/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 94b61e96441ca10668b436b4ef10dfd9464f0863 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:29:47,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:29:47,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:29:47,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:29:47,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:29:47,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:29:47,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:29:47,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:29:47,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:29:47,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:29:47,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:29:47,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:29:47,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:29:47,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:29:47,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:29:47,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:29:47,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:29:47,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:29:47,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:29:47,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:29:47,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:29:47,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:29:47,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:29:47,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:29:47,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:29:47,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:29:47,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:29:47,251 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:29:47,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:29:47,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:29:47,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:29:47,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:29:47,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:29:47,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:29:47,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:29:47,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:29:47,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:29:47,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:29:47,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:29:47,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:29:47,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:29:47,266 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1574bcf5-0c7d-4575-9aa3-f646f8f9638f/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-11-28 07:29:47,308 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:29:47,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:29:47,310 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:29:47,310 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:29:47,310 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:29:47,310 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:29:47,311 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:29:47,311 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:29:47,311 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:29:47,311 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:29:47,312 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:29:47,312 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:29:47,313 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:29:47,313 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:29:47,313 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:29:47,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:29:47,314 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:29:47,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:29:47,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:29:47,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:29:47,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:29:47,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:29:47,315 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-28 07:29:47,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:29:47,316 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:29:47,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:29:47,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:29:47,317 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:29:47,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:29:47,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:29:47,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:29:47,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:29:47,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:29:47,320 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:29:47,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:29:47,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:29:47,320 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:29:47,320 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:29:47,321 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_1574bcf5-0c7d-4575-9aa3-f646f8f9638f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1574bcf5-0c7d-4575-9aa3-f646f8f9638f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94b61e96441ca10668b436b4ef10dfd9464f0863 [2020-11-28 07:29:47,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:29:47,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:29:47,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:29:47,663 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:29:47,663 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:29:47,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1574bcf5-0c7d-4575-9aa3-f646f8f9638f/bin/utaipan/../../sv-benchmarks/c/termination-crafted/NonTermination4.c [2020-11-28 07:29:47,744 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1574bcf5-0c7d-4575-9aa3-f646f8f9638f/bin/utaipan/data/45ef991c6/4010e2c1681c445e90ea3df570fbd4e0/FLAGeb8713a2a [2020-11-28 07:29:48,196 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:29:48,197 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1574bcf5-0c7d-4575-9aa3-f646f8f9638f/sv-benchmarks/c/termination-crafted/NonTermination4.c [2020-11-28 07:29:48,222 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1574bcf5-0c7d-4575-9aa3-f646f8f9638f/bin/utaipan/data/45ef991c6/4010e2c1681c445e90ea3df570fbd4e0/FLAGeb8713a2a [2020-11-28 07:29:48,579 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1574bcf5-0c7d-4575-9aa3-f646f8f9638f/bin/utaipan/data/45ef991c6/4010e2c1681c445e90ea3df570fbd4e0 [2020-11-28 07:29:48,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:29:48,583 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:29:48,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:29:48,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:29:48,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:29:48,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:29:48" (1/1) ... [2020-11-28 07:29:48,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@671c78fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:48, skipping insertion in model container [2020-11-28 07:29:48,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:29:48" (1/1) ... [2020-11-28 07:29:48,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:29:48,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:29:48,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:29:48,808 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:29:48,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:29:48,867 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:29:48,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:48 WrapperNode [2020-11-28 07:29:48,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:29:48,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:29:48,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:29:48,871 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:29:48,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:48" (1/1) ... [2020-11-28 07:29:48,884 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:48" (1/1) ... [2020-11-28 07:29:48,902 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:29:48,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:29:48,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:29:48,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:29:48,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:48" (1/1) ... [2020-11-28 07:29:48,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:48" (1/1) ... [2020-11-28 07:29:48,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:48" (1/1) ... [2020-11-28 07:29:48,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:48" (1/1) ... [2020-11-28 07:29:48,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:48" (1/1) ... [2020-11-28 07:29:48,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:48" (1/1) ... [2020-11-28 07:29:48,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:48" (1/1) ... [2020-11-28 07:29:48,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:29:48,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:29:48,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:29:48,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:29:48,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1574bcf5-0c7d-4575-9aa3-f646f8f9638f/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 [2020-11-28 07:29:49,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:29:49,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:29:49,233 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:29:49,233 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-28 07:29:49,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:29:49 BoogieIcfgContainer [2020-11-28 07:29:49,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:29:49,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:29:49,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:29:49,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:29:49,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:29:48" (1/3) ... [2020-11-28 07:29:49,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@767cd496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:29:49, skipping insertion in model container [2020-11-28 07:29:49,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:29:48" (2/3) ... [2020-11-28 07:29:49,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@767cd496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:29:49, skipping insertion in model container [2020-11-28 07:29:49,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:29:49" (3/3) ... [2020-11-28 07:29:49,246 INFO L111 eAbstractionObserver]: Analyzing ICFG NonTermination4.c [2020-11-28 07:29:49,257 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:29:49,264 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-28 07:29:49,277 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-28 07:29:49,310 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:29:49,311 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:29:49,311 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:29:49,311 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:29:49,311 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:29:49,311 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:29:49,311 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:29:49,312 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:29:49,329 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-11-28 07:29:49,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:29:49,337 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:49,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:29:49,338 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:29:49,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:49,346 INFO L82 PathProgramCache]: Analyzing trace with hash 31073, now seen corresponding path program 1 times [2020-11-28 07:29:49,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:49,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989445096] [2020-11-28 07:29:49,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:49,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:49,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989445096] [2020-11-28 07:29:49,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:29:49,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:29:49,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141799417] [2020-11-28 07:29:49,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:29:49,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:49,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:29:49,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:29:49,526 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-11-28 07:29:49,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:49,728 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2020-11-28 07:29:49,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:29:49,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-28 07:29:49,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:49,740 INFO L225 Difference]: With dead ends: 15 [2020-11-28 07:29:49,741 INFO L226 Difference]: Without dead ends: 13 [2020-11-28 07:29:49,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:29:49,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-28 07:29:49,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-11-28 07:29:49,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-28 07:29:49,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-11-28 07:29:49,778 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 3 [2020-11-28 07:29:49,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:49,779 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-11-28 07:29:49,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:29:49,779 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-11-28 07:29:49,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:29:49,780 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:49,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:29:49,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:29:49,781 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:29:49,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:49,784 INFO L82 PathProgramCache]: Analyzing trace with hash 963307, now seen corresponding path program 1 times [2020-11-28 07:29:49,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:49,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038988373] [2020-11-28 07:29:49,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:49,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038988373] [2020-11-28 07:29:49,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:29:49,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:29:49,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790595348] [2020-11-28 07:29:49,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:29:49,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:49,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:29:49,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:29:49,828 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2020-11-28 07:29:49,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:49,857 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2020-11-28 07:29:49,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:29:49,858 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-28 07:29:49,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:49,858 INFO L225 Difference]: With dead ends: 12 [2020-11-28 07:29:49,858 INFO L226 Difference]: Without dead ends: 11 [2020-11-28 07:29:49,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:29:49,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-28 07:29:49,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-28 07:29:49,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-28 07:29:49,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-11-28 07:29:49,863 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 4 [2020-11-28 07:29:49,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:49,863 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-11-28 07:29:49,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:29:49,863 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-11-28 07:29:49,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:29:49,864 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:49,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:29:49,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:29:49,864 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:29:49,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:49,865 INFO L82 PathProgramCache]: Analyzing trace with hash 29862563, now seen corresponding path program 1 times [2020-11-28 07:29:49,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:49,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722054615] [2020-11-28 07:29:49,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:49,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:49,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722054615] [2020-11-28 07:29:49,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:29:49,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:29:49,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493210518] [2020-11-28 07:29:49,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:29:49,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:49,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:29:49,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:29:49,895 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 3 states. [2020-11-28 07:29:49,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:49,917 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2020-11-28 07:29:49,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:29:49,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-28 07:29:49,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:49,918 INFO L225 Difference]: With dead ends: 15 [2020-11-28 07:29:49,919 INFO L226 Difference]: Without dead ends: 14 [2020-11-28 07:29:49,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:29:49,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-28 07:29:49,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-11-28 07:29:49,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-28 07:29:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-11-28 07:29:49,923 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 5 [2020-11-28 07:29:49,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:49,923 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-11-28 07:29:49,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:29:49,923 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-11-28 07:29:49,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:29:49,924 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:49,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:29:49,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:29:49,924 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:29:49,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:49,925 INFO L82 PathProgramCache]: Analyzing trace with hash 925739501, now seen corresponding path program 1 times [2020-11-28 07:29:49,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:49,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526226306] [2020-11-28 07:29:49,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:49,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526226306] [2020-11-28 07:29:49,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:29:49,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:29:49,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314835776] [2020-11-28 07:29:49,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:29:49,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:49,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:29:49,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:29:49,949 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2020-11-28 07:29:49,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:49,976 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-11-28 07:29:49,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:29:49,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-28 07:29:49,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:49,977 INFO L225 Difference]: With dead ends: 13 [2020-11-28 07:29:49,978 INFO L226 Difference]: Without dead ends: 12 [2020-11-28 07:29:49,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:29:49,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-28 07:29:49,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-28 07:29:49,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-28 07:29:49,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-11-28 07:29:49,983 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 6 [2020-11-28 07:29:49,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:49,983 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-11-28 07:29:49,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:29:49,984 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-11-28 07:29:49,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:29:49,984 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:49,984 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-11-28 07:29:49,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:29:49,985 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:29:49,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:49,986 INFO L82 PathProgramCache]: Analyzing trace with hash 577431471, now seen corresponding path program 1 times [2020-11-28 07:29:49,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:49,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117359396] [2020-11-28 07:29:49,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:50,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:50,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117359396] [2020-11-28 07:29:50,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391278076] [2020-11-28 07:29:50,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1574bcf5-0c7d-4575-9aa3-f646f8f9638f/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 [2020-11-28 07:29:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:50,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:29:50,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:29:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:50,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:29:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:50,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2140003436] [2020-11-28 07:29:50,196 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:29:50,196 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:29:50,201 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:29:50,207 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:29:50,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:29:50,505 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:29:50,892 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:29:50,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:29:50,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-11-28 07:29:50,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895891326] [2020-11-28 07:29:50,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:29:50,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:50,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:29:50,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-28 07:29:50,895 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-11-28 07:29:50,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:50,949 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-11-28 07:29:50,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:29:50,950 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-11-28 07:29:50,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:50,951 INFO L225 Difference]: With dead ends: 28 [2020-11-28 07:29:50,951 INFO L226 Difference]: Without dead ends: 27 [2020-11-28 07:29:50,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-28 07:29:50,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-28 07:29:50,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-11-28 07:29:50,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-28 07:29:50,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-11-28 07:29:50,956 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 8 [2020-11-28 07:29:50,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:50,957 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-11-28 07:29:50,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:29:50,957 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-11-28 07:29:50,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:29:50,957 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:50,957 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2020-11-28 07:29:51,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:29:51,174 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:29:51,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:51,175 INFO L82 PathProgramCache]: Analyzing trace with hash 860863857, now seen corresponding path program 1 times [2020-11-28 07:29:51,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:51,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694663085] [2020-11-28 07:29:51,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:51,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694663085] [2020-11-28 07:29:51,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949802630] [2020-11-28 07:29:51,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1574bcf5-0c7d-4575-9aa3-f646f8f9638f/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-28 07:29:51,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:51,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:29:51,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:29:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:51,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:29:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:51,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [339005101] [2020-11-28 07:29:51,299 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:29:51,300 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:29:51,300 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:29:51,300 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:29:51,300 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:29:51,383 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:29:51,688 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2020-11-28 07:29:51,689 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:29:51,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:29:51,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-11-28 07:29:51,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580816081] [2020-11-28 07:29:51,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:29:51,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:51,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:29:51,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-28 07:29:51,691 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-11-28 07:29:51,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:51,760 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-11-28 07:29:51,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:29:51,760 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-28 07:29:51,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:51,761 INFO L225 Difference]: With dead ends: 28 [2020-11-28 07:29:51,761 INFO L226 Difference]: Without dead ends: 27 [2020-11-28 07:29:51,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-28 07:29:51,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-28 07:29:51,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-28 07:29:51,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-28 07:29:51,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-11-28 07:29:51,766 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 10 [2020-11-28 07:29:51,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:51,766 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-11-28 07:29:51,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:29:51,767 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-11-28 07:29:51,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 07:29:51,767 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:51,767 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1] [2020-11-28 07:29:51,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-28 07:29:51,968 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:29:51,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:51,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1492388577, now seen corresponding path program 2 times [2020-11-28 07:29:51,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:51,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372069470] [2020-11-28 07:29:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:52,044 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:52,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372069470] [2020-11-28 07:29:52,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921421590] [2020-11-28 07:29:52,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1574bcf5-0c7d-4575-9aa3-f646f8f9638f/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 [2020-11-28 07:29:52,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-28 07:29:52,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:29:52,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 07:29:52,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:29:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:52,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:29:52,318 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:52,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1775671662] [2020-11-28 07:29:52,321 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:29:52,321 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:29:52,321 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:29:52,321 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:29:52,321 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:29:52,464 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:29:52,722 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:29:52,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:29:52,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2020-11-28 07:29:52,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314593992] [2020-11-28 07:29:52,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 07:29:52,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:52,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 07:29:52,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:29:52,725 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 12 states. [2020-11-28 07:29:52,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:52,814 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-11-28 07:29:52,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 07:29:52,815 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-11-28 07:29:52,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:52,816 INFO L225 Difference]: With dead ends: 61 [2020-11-28 07:29:52,816 INFO L226 Difference]: Without dead ends: 60 [2020-11-28 07:29:52,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:29:52,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-28 07:29:52,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2020-11-28 07:29:52,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-28 07:29:52,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2020-11-28 07:29:52,823 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 23 [2020-11-28 07:29:52,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:52,824 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2020-11-28 07:29:52,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 07:29:52,824 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2020-11-28 07:29:52,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 07:29:52,825 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:52,825 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1] [2020-11-28 07:29:53,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-28 07:29:53,026 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:29:53,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:53,026 INFO L82 PathProgramCache]: Analyzing trace with hash -333652957, now seen corresponding path program 2 times [2020-11-28 07:29:53,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:53,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428103659] [2020-11-28 07:29:53,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:53,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428103659] [2020-11-28 07:29:53,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182246222] [2020-11-28 07:29:53,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1574bcf5-0c7d-4575-9aa3-f646f8f9638f/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:29:53,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-28 07:29:53,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:29:53,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 07:29:53,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:29:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:53,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:29:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:53,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1609197282] [2020-11-28 07:29:53,305 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:29:53,305 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:29:53,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:29:53,306 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:29:53,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:29:53,401 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:29:53,583 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:29:53,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:29:53,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2020-11-28 07:29:53,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175026727] [2020-11-28 07:29:53,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 07:29:53,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:53,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 07:29:53,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-11-28 07:29:53,585 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 12 states. [2020-11-28 07:29:53,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:53,655 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-11-28 07:29:53,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 07:29:53,657 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-11-28 07:29:53,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:53,658 INFO L225 Difference]: With dead ends: 58 [2020-11-28 07:29:53,659 INFO L226 Difference]: Without dead ends: 57 [2020-11-28 07:29:53,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-11-28 07:29:53,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-28 07:29:53,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-11-28 07:29:53,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-28 07:29:53,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-11-28 07:29:53,666 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 25 [2020-11-28 07:29:53,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:53,667 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-11-28 07:29:53,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 07:29:53,667 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-11-28 07:29:53,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-28 07:29:53,668 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:53,669 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1] [2020-11-28 07:29:53,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:29:53,894 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:29:53,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:53,894 INFO L82 PathProgramCache]: Analyzing trace with hash -390144735, now seen corresponding path program 3 times [2020-11-28 07:29:53,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:53,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910841138] [2020-11-28 07:29:53,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:54,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910841138] [2020-11-28 07:29:54,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218416553] [2020-11-28 07:29:54,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1574bcf5-0c7d-4575-9aa3-f646f8f9638f/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 [2020-11-28 07:29:54,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 07:29:54,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:29:54,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 07:29:54,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:29:54,361 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:54,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:29:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:54,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [376952832] [2020-11-28 07:29:54,724 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:29:54,724 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:29:54,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:29:54,725 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:29:54,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:29:54,851 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:29:55,040 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:29:55,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:29:55,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2020-11-28 07:29:55,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220773072] [2020-11-28 07:29:55,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-28 07:29:55,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:55,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-28 07:29:55,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2020-11-28 07:29:55,043 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 24 states. [2020-11-28 07:29:55,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:55,220 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2020-11-28 07:29:55,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-28 07:29:55,220 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-11-28 07:29:55,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:55,222 INFO L225 Difference]: With dead ends: 127 [2020-11-28 07:29:55,222 INFO L226 Difference]: Without dead ends: 126 [2020-11-28 07:29:55,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 131 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2020-11-28 07:29:55,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-11-28 07:29:55,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 115. [2020-11-28 07:29:55,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-11-28 07:29:55,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2020-11-28 07:29:55,248 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 53 [2020-11-28 07:29:55,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:55,252 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2020-11-28 07:29:55,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-28 07:29:55,252 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2020-11-28 07:29:55,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-28 07:29:55,257 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:55,257 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1] [2020-11-28 07:29:55,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:29:55,482 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:29:55,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:55,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1266934173, now seen corresponding path program 3 times [2020-11-28 07:29:55,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:55,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329273575] [2020-11-28 07:29:55,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:29:55,640 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:55,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329273575] [2020-11-28 07:29:55,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537522193] [2020-11-28 07:29:55,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1574bcf5-0c7d-4575-9aa3-f646f8f9638f/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:29:55,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 07:29:55,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:29:55,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 07:29:55,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:29:55,828 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:55,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:29:56,106 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:29:56,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1368845240] [2020-11-28 07:29:56,108 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:29:56,108 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:29:56,109 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:29:56,109 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:29:56,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:29:56,169 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:29:56,358 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:29:56,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:29:56,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2020-11-28 07:29:56,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907339027] [2020-11-28 07:29:56,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-28 07:29:56,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:29:56,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-28 07:29:56,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2020-11-28 07:29:56,361 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand 24 states. [2020-11-28 07:29:56,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:29:56,498 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2020-11-28 07:29:56,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-28 07:29:56,499 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-11-28 07:29:56,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:29:56,500 INFO L225 Difference]: With dead ends: 116 [2020-11-28 07:29:56,500 INFO L226 Difference]: Without dead ends: 115 [2020-11-28 07:29:56,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 138 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2020-11-28 07:29:56,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-11-28 07:29:56,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-11-28 07:29:56,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-11-28 07:29:56,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2020-11-28 07:29:56,523 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 55 [2020-11-28 07:29:56,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:29:56,523 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2020-11-28 07:29:56,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-28 07:29:56,524 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2020-11-28 07:29:56,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-11-28 07:29:56,526 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:29:56,526 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 1, 1] [2020-11-28 07:29:56,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:29:56,742 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:29:56,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:29:56,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1391435441, now seen corresponding path program 4 times [2020-11-28 07:29:56,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:29:56,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675629064] [2020-11-28 07:29:56,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:29:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:29:56,790 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:29:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:29:56,823 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:29:56,837 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:29:56,838 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:29:56,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2020-11-28 07:29:56,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:29:56 BoogieIcfgContainer [2020-11-28 07:29:56,866 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:29:56,867 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:29:56,867 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:29:56,867 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:29:56,868 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:29:49" (3/4) ... [2020-11-28 07:29:56,869 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:29:56,931 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1574bcf5-0c7d-4575-9aa3-f646f8f9638f/bin/utaipan/witness.graphml [2020-11-28 07:29:56,931 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:29:56,932 INFO L168 Benchmark]: Toolchain (without parser) took 8348.47 ms. Allocated memory was 83.9 MB in the beginning and 130.0 MB in the end (delta: 46.1 MB). Free memory was 52.2 MB in the beginning and 46.4 MB in the end (delta: 5.9 MB). Peak memory consumption was 53.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:56,933 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 83.9 MB. Free memory was 57.7 MB in the beginning and 57.7 MB in the end (delta: 32.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:29:56,933 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.37 ms. Allocated memory is still 83.9 MB. Free memory was 52.0 MB in the beginning and 63.4 MB in the end (delta: -11.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:56,934 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.65 ms. Allocated memory is still 83.9 MB. Free memory was 63.4 MB in the beginning and 62.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:29:56,934 INFO L168 Benchmark]: Boogie Preprocessor took 21.87 ms. Allocated memory is still 83.9 MB. Free memory was 62.1 MB in the beginning and 61.4 MB in the end (delta: 747.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:29:56,935 INFO L168 Benchmark]: RCFGBuilder took 308.16 ms. Allocated memory is still 83.9 MB. Free memory was 61.4 MB in the beginning and 51.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:56,935 INFO L168 Benchmark]: TraceAbstraction took 7629.63 ms. Allocated memory was 83.9 MB in the beginning and 130.0 MB in the end (delta: 46.1 MB). Free memory was 51.3 MB in the beginning and 49.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 49.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:56,944 INFO L168 Benchmark]: Witness Printer took 64.41 ms. Allocated memory is still 130.0 MB. Free memory was 49.5 MB in the beginning and 46.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:29:56,946 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 83.9 MB. Free memory was 57.7 MB in the beginning and 57.7 MB in the end (delta: 32.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 284.37 ms. Allocated memory is still 83.9 MB. Free memory was 52.0 MB in the beginning and 63.4 MB in the end (delta: -11.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.65 ms. Allocated memory is still 83.9 MB. Free memory was 63.4 MB in the beginning and 62.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.87 ms. Allocated memory is still 83.9 MB. Free memory was 62.1 MB in the beginning and 61.4 MB in the end (delta: 747.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 308.16 ms. Allocated memory is still 83.9 MB. Free memory was 61.4 MB in the beginning and 51.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7629.63 ms. Allocated memory was 83.9 MB in the beginning and 130.0 MB in the end (delta: 46.1 MB). Free memory was 51.3 MB in the beginning and 49.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 49.3 MB. Max. memory is 16.1 GB. * Witness Printer took 64.41 ms. Allocated memory is still 130.0 MB. Free memory was 49.5 MB in the beginning and 46.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 20]: integer overflow possible integer overflow possible We found a FailurePath: [L15] int x, y; [L16] x = 1 [L17] y = 1 [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] 3*y - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.5s, OverallIterations: 11, TraceHistogramMax: 20, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 55 SDtfs, 156 SDslu, 234 SDs, 0 SdLazy, 233 SolverSat, 55 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 550 GetRequests, 417 SyntacticMatches, 30 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 20 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 466 NumberOfCodeBlocks, 466 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 518 ConstructedInterpolants, 0 QuantifiedInterpolants, 75072 SizeOfPredicates, 0 NumberOfNonLiveVariables, 330 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 0/1800 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...