./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark08_conjunctive.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d635d215-aa0c-44e9-8370-38bbdd797373/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d635d215-aa0c-44e9-8370-38bbdd797373/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d635d215-aa0c-44e9-8370-38bbdd797373/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d635d215-aa0c-44e9-8370-38bbdd797373/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark08_conjunctive.i -s /tmp/vcloud-vcloud-master/worker/run_dir_d635d215-aa0c-44e9-8370-38bbdd797373/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d635d215-aa0c-44e9-8370-38bbdd797373/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 18829c97cf11abff32d3007e38ce2546f8dc4f5d ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis No suitable file found in config dir /tmp/vcloud-vcloud-master/worker/run_dir_d635d215-aa0c-44e9-8370-38bbdd797373/bin/utaipan/config using search string *Overflow*32bit*_Bitvector*.epf No suitable settings file found using Overflow*32bit*_Bitvector ERROR: UNSUPPORTED PROPERTY Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 20:41:07,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 20:41:07,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 20:41:07,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 20:41:07,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 20:41:07,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 20:41:07,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 20:41:07,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 20:41:07,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 20:41:07,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 20:41:07,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 20:41:07,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 20:41:07,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 20:41:07,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 20:41:07,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 20:41:07,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 20:41:07,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 20:41:07,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 20:41:07,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 20:41:07,406 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 20:41:07,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 20:41:07,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 20:41:07,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 20:41:07,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 20:41:07,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 20:41:07,414 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 20:41:07,414 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 20:41:07,415 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 20:41:07,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 20:41:07,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 20:41:07,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 20:41:07,418 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 20:41:07,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 20:41:07,419 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 20:41:07,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 20:41:07,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 20:41:07,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 20:41:07,421 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 20:41:07,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 20:41:07,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 20:41:07,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 20:41:07,423 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d635d215-aa0c-44e9-8370-38bbdd797373/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2020-12-09 20:41:07,444 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 20:41:07,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 20:41:07,445 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 20:41:07,446 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 20:41:07,446 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 20:41:07,446 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 20:41:07,446 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 20:41:07,446 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 20:41:07,446 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 20:41:07,447 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 20:41:07,447 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 20:41:07,447 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 20:41:07,447 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 20:41:07,447 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 20:41:07,448 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 20:41:07,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 20:41:07,448 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 20:41:07,449 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 20:41:07,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 20:41:07,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 20:41:07,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 20:41:07,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 20:41:07,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 20:41:07,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 20:41:07,450 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-09 20:41:07,450 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 20:41:07,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 20:41:07,450 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 20:41:07,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 20:41:07,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 20:41:07,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 20:41:07,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 20:41:07,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 20:41:07,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 20:41:07,451 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 20:41:07,452 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 20:41:07,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 20:41:07,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 20:41:07,452 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 20:41:07,452 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 20:41:07,452 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_d635d215-aa0c-44e9-8370-38bbdd797373/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d635d215-aa0c-44e9-8370-38bbdd797373/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18829c97cf11abff32d3007e38ce2546f8dc4f5d [2020-12-09 20:41:07,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 20:41:07,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 20:41:07,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 20:41:07,644 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 20:41:07,644 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 20:41:07,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d635d215-aa0c-44e9-8370-38bbdd797373/bin/utaipan/../../sv-benchmarks/c/loop-zilu/benchmark08_conjunctive.i [2020-12-09 20:41:07,685 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d635d215-aa0c-44e9-8370-38bbdd797373/bin/utaipan/data/4220097dc/a6ae12b870524ee68cb4847111e7e402/FLAG11290dbdc [2020-12-09 20:41:08,054 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 20:41:08,054 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d635d215-aa0c-44e9-8370-38bbdd797373/sv-benchmarks/c/loop-zilu/benchmark08_conjunctive.i [2020-12-09 20:41:08,059 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d635d215-aa0c-44e9-8370-38bbdd797373/bin/utaipan/data/4220097dc/a6ae12b870524ee68cb4847111e7e402/FLAG11290dbdc [2020-12-09 20:41:08,068 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d635d215-aa0c-44e9-8370-38bbdd797373/bin/utaipan/data/4220097dc/a6ae12b870524ee68cb4847111e7e402 [2020-12-09 20:41:08,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 20:41:08,071 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 20:41:08,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 20:41:08,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 20:41:08,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 20:41:08,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:41:08" (1/1) ... [2020-12-09 20:41:08,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d2a85fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:08, skipping insertion in model container [2020-12-09 20:41:08,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:41:08" (1/1) ... [2020-12-09 20:41:08,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 20:41:08,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 20:41:08,198 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_d635d215-aa0c-44e9-8370-38bbdd797373/sv-benchmarks/c/loop-zilu/benchmark08_conjunctive.i[873,886] [2020-12-09 20:41:08,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:41:08,210 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 20:41:08,219 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_d635d215-aa0c-44e9-8370-38bbdd797373/sv-benchmarks/c/loop-zilu/benchmark08_conjunctive.i[873,886] [2020-12-09 20:41:08,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:41:08,231 INFO L208 MainTranslator]: Completed translation [2020-12-09 20:41:08,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:08 WrapperNode [2020-12-09 20:41:08,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 20:41:08,232 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 20:41:08,232 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 20:41:08,232 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 20:41:08,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:08" (1/1) ... [2020-12-09 20:41:08,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:08" (1/1) ... [2020-12-09 20:41:08,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 20:41:08,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 20:41:08,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 20:41:08,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 20:41:08,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:08" (1/1) ... [2020-12-09 20:41:08,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:08" (1/1) ... [2020-12-09 20:41:08,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:08" (1/1) ... [2020-12-09 20:41:08,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:08" (1/1) ... [2020-12-09 20:41:08,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:08" (1/1) ... [2020-12-09 20:41:08,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:08" (1/1) ... [2020-12-09 20:41:08,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:08" (1/1) ... [2020-12-09 20:41:08,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 20:41:08,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 20:41:08,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 20:41:08,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 20:41:08,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d635d215-aa0c-44e9-8370-38bbdd797373/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 20:41:08,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 20:41:08,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 20:41:08,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 20:41:08,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 20:41:08,493 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 20:41:08,493 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 20:41:08,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:41:08 BoogieIcfgContainer [2020-12-09 20:41:08,495 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 20:41:08,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 20:41:08,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 20:41:08,498 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 20:41:08,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:41:08" (1/3) ... [2020-12-09 20:41:08,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b65e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:41:08, skipping insertion in model container [2020-12-09 20:41:08,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:41:08" (2/3) ... [2020-12-09 20:41:08,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b65e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:41:08, skipping insertion in model container [2020-12-09 20:41:08,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:41:08" (3/3) ... [2020-12-09 20:41:08,500 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark08_conjunctive.i [2020-12-09 20:41:08,510 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 20:41:08,512 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-09 20:41:08,521 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-09 20:41:08,540 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 20:41:08,540 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 20:41:08,540 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 20:41:08,541 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 20:41:08,541 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 20:41:08,541 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 20:41:08,541 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 20:41:08,541 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 20:41:08,552 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-09 20:41:08,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 20:41:08,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:41:08,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 20:41:08,556 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:41:08,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:41:08,561 INFO L82 PathProgramCache]: Analyzing trace with hash 2092610, now seen corresponding path program 1 times [2020-12-09 20:41:08,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:41:08,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319346037] [2020-12-09 20:41:08,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:41:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:41:08,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319346037] [2020-12-09 20:41:08,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:41:08,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:41:08,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197173422] [2020-12-09 20:41:08,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:41:08,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:41:08,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:41:08,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:41:08,700 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 3 states. [2020-12-09 20:41:08,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:41:08,738 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2020-12-09 20:41:08,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:41:08,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 20:41:08,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:41:08,745 INFO L225 Difference]: With dead ends: 19 [2020-12-09 20:41:08,745 INFO L226 Difference]: Without dead ends: 14 [2020-12-09 20:41:08,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:41:08,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-09 20:41:08,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-12-09 20:41:08,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-09 20:41:08,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-09 20:41:08,768 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 4 [2020-12-09 20:41:08,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:41:08,768 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-09 20:41:08,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:41:08,769 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-09 20:41:08,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 20:41:08,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:41:08,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 20:41:08,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 20:41:08,769 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:41:08,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:41:08,770 INFO L82 PathProgramCache]: Analyzing trace with hash 64870960, now seen corresponding path program 1 times [2020-12-09 20:41:08,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:41:08,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331913169] [2020-12-09 20:41:08,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:41:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:41:08,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331913169] [2020-12-09 20:41:08,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:41:08,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:41:08,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281861495] [2020-12-09 20:41:08,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:41:08,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:41:08,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:41:08,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:41:08,797 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2020-12-09 20:41:08,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:41:08,810 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-09 20:41:08,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:41:08,811 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 20:41:08,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:41:08,811 INFO L225 Difference]: With dead ends: 15 [2020-12-09 20:41:08,811 INFO L226 Difference]: Without dead ends: 14 [2020-12-09 20:41:08,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:41:08,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-09 20:41:08,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-09 20:41:08,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 20:41:08,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-09 20:41:08,815 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 5 [2020-12-09 20:41:08,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:41:08,815 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-09 20:41:08,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:41:08,815 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-09 20:41:08,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 20:41:08,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:41:08,815 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 20:41:08,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 20:41:08,816 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:41:08,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:41:08,816 INFO L82 PathProgramCache]: Analyzing trace with hash 2010999812, now seen corresponding path program 1 times [2020-12-09 20:41:08,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:41:08,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120236448] [2020-12-09 20:41:08,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:41:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:41:08,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120236448] [2020-12-09 20:41:08,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:41:08,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:41:08,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018241218] [2020-12-09 20:41:08,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:41:08,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:41:08,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:41:08,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:41:08,846 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2020-12-09 20:41:08,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:41:08,874 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-09 20:41:08,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:41:08,874 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 20:41:08,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:41:08,875 INFO L225 Difference]: With dead ends: 18 [2020-12-09 20:41:08,875 INFO L226 Difference]: Without dead ends: 17 [2020-12-09 20:41:08,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:41:08,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-09 20:41:08,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2020-12-09 20:41:08,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 20:41:08,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-09 20:41:08,878 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 6 [2020-12-09 20:41:08,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:41:08,878 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-09 20:41:08,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:41:08,878 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-09 20:41:08,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 20:41:08,878 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:41:08,879 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:41:08,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 20:41:08,879 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:41:08,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:41:08,879 INFO L82 PathProgramCache]: Analyzing trace with hash -2083515214, now seen corresponding path program 1 times [2020-12-09 20:41:08,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:41:08,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256152357] [2020-12-09 20:41:08,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:41:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:41:08,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256152357] [2020-12-09 20:41:08,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:41:08,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:41:08,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467019780] [2020-12-09 20:41:08,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:41:08,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:41:08,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:41:08,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:41:08,907 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2020-12-09 20:41:08,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:41:08,926 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-09 20:41:08,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:41:08,926 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 20:41:08,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:41:08,927 INFO L225 Difference]: With dead ends: 15 [2020-12-09 20:41:08,927 INFO L226 Difference]: Without dead ends: 14 [2020-12-09 20:41:08,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:41:08,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-09 20:41:08,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-09 20:41:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 20:41:08,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-09 20:41:08,929 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 7 [2020-12-09 20:41:08,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:41:08,930 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-09 20:41:08,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:41:08,930 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-09 20:41:08,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 20:41:08,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:41:08,930 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:41:08,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 20:41:08,930 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:41:08,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:41:08,931 INFO L82 PathProgramCache]: Analyzing trace with hash -803359244, now seen corresponding path program 1 times [2020-12-09 20:41:08,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:41:08,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651645313] [2020-12-09 20:41:08,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:41:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:41:08,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651645313] [2020-12-09 20:41:08,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644940099] [2020-12-09 20:41:08,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d635d215-aa0c-44e9-8370-38bbdd797373/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:41:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:09,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 20:41:09,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:41:09,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:41:09,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:41:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:41:09,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1140587410] [2020-12-09 20:41:09,138 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 20:41:09,138 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:41:09,142 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:41:09,146 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:41:09,146 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:41:09,497 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:41:09,924 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2020-12-09 20:41:10,167 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2020-12-09 20:41:10,391 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2020-12-09 20:41:10,705 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2020-12-09 20:41:10,776 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:41:10,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:41:10,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2020-12-09 20:41:10,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084758885] [2020-12-09 20:41:10,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 20:41:10,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:41:10,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 20:41:10,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-12-09 20:41:10,779 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2020-12-09 20:41:10,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:41:10,854 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-12-09 20:41:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 20:41:10,855 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 9 [2020-12-09 20:41:10,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:41:10,855 INFO L225 Difference]: With dead ends: 25 [2020-12-09 20:41:10,855 INFO L226 Difference]: Without dead ends: 24 [2020-12-09 20:41:10,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-12-09 20:41:10,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-09 20:41:10,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-12-09 20:41:10,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 20:41:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-09 20:41:10,859 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 9 [2020-12-09 20:41:10,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:41:10,859 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-09 20:41:10,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 20:41:10,860 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-09 20:41:10,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 20:41:10,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:41:10,860 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 20:41:11,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:41:11,062 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:41:11,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:41:11,064 INFO L82 PathProgramCache]: Analyzing trace with hash 865667262, now seen corresponding path program 1 times [2020-12-09 20:41:11,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:41:11,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880571777] [2020-12-09 20:41:11,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:41:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:41:11,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880571777] [2020-12-09 20:41:11,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793002697] [2020-12-09 20:41:11,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d635d215-aa0c-44e9-8370-38bbdd797373/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:41:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:11,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 20:41:11,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:41:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:41:11,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:41:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:41:11,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 20:41:11,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2020-12-09 20:41:11,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157184694] [2020-12-09 20:41:11,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:41:11,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:41:11,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:41:11,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-12-09 20:41:11,328 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2020-12-09 20:41:11,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:41:11,361 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-12-09 20:41:11,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 20:41:11,361 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-09 20:41:11,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:41:11,362 INFO L225 Difference]: With dead ends: 22 [2020-12-09 20:41:11,362 INFO L226 Difference]: Without dead ends: 21 [2020-12-09 20:41:11,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-12-09 20:41:11,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-09 20:41:11,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-09 20:41:11,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 20:41:11,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-09 20:41:11,365 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 10 [2020-12-09 20:41:11,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:41:11,365 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-09 20:41:11,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:41:11,365 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-09 20:41:11,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 20:41:11,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:41:11,366 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2020-12-09 20:41:11,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-09 20:41:11,567 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:41:11,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:41:11,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1065881398, now seen corresponding path program 1 times [2020-12-09 20:41:11,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:41:11,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792715215] [2020-12-09 20:41:11,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:41:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:41:11,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792715215] [2020-12-09 20:41:11,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186940690] [2020-12-09 20:41:11,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d635d215-aa0c-44e9-8370-38bbdd797373/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:41:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:11,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 20:41:11,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:41:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:41:11,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:41:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:41:11,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1693973726] [2020-12-09 20:41:11,831 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 20:41:11,831 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:41:11,831 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:41:11,831 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:41:11,831 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:41:12,023 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:41:12,293 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2020-12-09 20:41:12,467 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2020-12-09 20:41:12,661 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2020-12-09 20:41:12,906 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2020-12-09 20:41:12,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:41:12,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5, 5] total 15 [2020-12-09 20:41:12,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860251512] [2020-12-09 20:41:12,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 20:41:12,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:41:12,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 20:41:12,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-12-09 20:41:12,965 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-12-09 20:41:13,106 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-12-09 20:41:13,258 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-12-09 20:41:13,393 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-12-09 20:41:13,537 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-12-09 20:41:13,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:41:13,556 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-12-09 20:41:13,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 20:41:13,557 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-09 20:41:13,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:41:13,557 INFO L225 Difference]: With dead ends: 21 [2020-12-09 20:41:13,557 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 20:41:13,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-12-09 20:41:13,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 20:41:13,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-09 20:41:13,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 20:41:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-09 20:41:13,561 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2020-12-09 20:41:13,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:41:13,561 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-09 20:41:13,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 20:41:13,562 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-09 20:41:13,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 20:41:13,562 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:41:13,562 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1] [2020-12-09 20:41:13,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-09 20:41:13,764 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:41:13,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:41:13,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1075330740, now seen corresponding path program 2 times [2020-12-09 20:41:13,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:41:13,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82924684] [2020-12-09 20:41:13,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:41:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:41:13,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82924684] [2020-12-09 20:41:13,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431661631] [2020-12-09 20:41:13,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d635d215-aa0c-44e9-8370-38bbdd797373/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:41:13,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-09 20:41:13,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 20:41:13,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 20:41:13,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:41:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:41:13,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:41:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:41:14,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1151797603] [2020-12-09 20:41:14,116 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 20:41:14,116 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:41:14,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:41:14,117 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:41:14,117 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:41:14,304 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:41:15,172 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:41:15,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:41:15,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2020-12-09 20:41:15,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670047055] [2020-12-09 20:41:15,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-09 20:41:15,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:41:15,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-09 20:41:15,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2020-12-09 20:41:15,174 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 23 states. [2020-12-09 20:41:15,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:41:15,391 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-12-09 20:41:15,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-09 20:41:15,391 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 19 [2020-12-09 20:41:15,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:41:15,392 INFO L225 Difference]: With dead ends: 41 [2020-12-09 20:41:15,392 INFO L226 Difference]: Without dead ends: 40 [2020-12-09 20:41:15,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2020-12-09 20:41:15,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-09 20:41:15,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-09 20:41:15,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-09 20:41:15,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-12-09 20:41:15,399 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 19 [2020-12-09 20:41:15,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:41:15,399 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-12-09 20:41:15,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-09 20:41:15,399 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-12-09 20:41:15,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-09 20:41:15,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:41:15,400 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1] [2020-12-09 20:41:15,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:41:15,602 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:41:15,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:41:15,604 INFO L82 PathProgramCache]: Analyzing trace with hash 237862964, now seen corresponding path program 3 times [2020-12-09 20:41:15,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:41:15,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99128657] [2020-12-09 20:41:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:41:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:41:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:41:15,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99128657] [2020-12-09 20:41:15,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979528830] [2020-12-09 20:41:15,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d635d215-aa0c-44e9-8370-38bbdd797373/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 [2020-12-09 20:41:15,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 20:41:15,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 20:41:15,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-09 20:41:15,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:41:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:41:16,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:41:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:41:34,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1938452900] [2020-12-09 20:41:34,387 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 20:41:34,387 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:41:34,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:41:34,387 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:41:34,387 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:41:34,567 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:41:34,776 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 28 [2020-12-09 20:41:35,191 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2020-12-09 20:41:35,474 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2020-12-09 20:41:35,789 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2020-12-09 20:41:36,167 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2020-12-09 20:41:36,276 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:41:36,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:41:36,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2020-12-09 20:41:36,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743887424] [2020-12-09 20:41:36,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-09 20:41:36,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:41:36,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-09 20:41:36,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=2499, Unknown=8, NotChecked=0, Total=2862 [2020-12-09 20:41:36,278 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 47 states. [2020-12-09 20:42:51,030 WARN L197 SmtUtils]: Spent 28.88 s on a formula simplification. DAG size of input: 113 DAG size of output: 67 [2020-12-09 20:42:58,486 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 25 [2020-12-09 20:43:08,536 WARN L197 SmtUtils]: Spent 4.61 s on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-12-09 20:43:09,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:43:09,947 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2020-12-09 20:43:09,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-09 20:43:09,949 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 39 [2020-12-09 20:43:09,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:43:09,950 INFO L225 Difference]: With dead ends: 81 [2020-12-09 20:43:09,950 INFO L226 Difference]: Without dead ends: 80 [2020-12-09 20:43:09,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1475 ImplicationChecksByTransitivity, 112.4s TimeCoverageRelationStatistics Valid=915, Invalid=4459, Unknown=28, NotChecked=0, Total=5402 [2020-12-09 20:43:09,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-09 20:43:09,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-12-09 20:43:09,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-09 20:43:09,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2020-12-09 20:43:09,960 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 39 [2020-12-09 20:43:09,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:43:09,960 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2020-12-09 20:43:09,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-09 20:43:09,960 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2020-12-09 20:43:09,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-09 20:43:09,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:43:09,964 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1] [2020-12-09 20:43:10,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-12-09 20:43:10,166 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:43:10,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:43:10,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1923662644, now seen corresponding path program 4 times [2020-12-09 20:43:10,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:43:10,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446327319] [2020-12-09 20:43:10,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:43:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:11,889 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:11,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446327319] [2020-12-09 20:43:11,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641108476] [2020-12-09 20:43:11,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d635d215-aa0c-44e9-8370-38bbdd797373/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 [2020-12-09 20:43:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:43:11,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-09 20:43:11,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:43:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:43:16,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:49:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:49:13,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1104448872] [2020-12-09 20:49:13,459 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 20:49:13,459 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:49:13,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:49:13,459 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:49:13,459 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:49:13,702 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:49:14,564 WARN L197 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 28 [2020-12-09 20:49:15,295 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-12-09 20:49:16,396 WARN L197 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2020-12-09 20:49:17,562 WARN L197 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2020-12-09 20:49:18,775 WARN L197 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2020-12-09 20:49:20,347 WARN L197 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2020-12-09 20:49:20,855 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2020-12-09 20:49:20,859 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:49:20,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:49:20,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 94 [2020-12-09 20:49:20,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391259684] [2020-12-09 20:49:20,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-12-09 20:49:20,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:49:20,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-12-09 20:49:20,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1203, Invalid=8957, Unknown=142, NotChecked=0, Total=10302 [2020-12-09 20:49:20,865 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 95 states. [2020-12-09 20:49:29,272 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-12-09 20:49:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-09 20:49:29,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:49:29,476 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:209) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:226) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:153) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:829) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:743) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:674) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:473) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:206) ... 45 more [2020-12-09 20:49:29,484 INFO L168 Benchmark]: Toolchain (without parser) took 501413.47 ms. Allocated memory was 96.5 MB in the beginning and 172.0 MB in the end (delta: 75.5 MB). Free memory was 62.9 MB in the beginning and 126.3 MB in the end (delta: -63.4 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. [2020-12-09 20:49:29,485 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 96.5 MB. Free memory was 79.1 MB in the beginning and 78.9 MB in the end (delta: 138.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:49:29,485 INFO L168 Benchmark]: CACSL2BoogieTranslator took 159.69 ms. Allocated memory is still 96.5 MB. Free memory was 62.8 MB in the beginning and 74.0 MB in the end (delta: -11.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 20:49:29,486 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.08 ms. Allocated memory is still 96.5 MB. Free memory was 74.0 MB in the beginning and 72.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:49:29,486 INFO L168 Benchmark]: Boogie Preprocessor took 13.41 ms. Allocated memory is still 96.5 MB. Free memory was 72.6 MB in the beginning and 71.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:49:29,486 INFO L168 Benchmark]: RCFGBuilder took 226.54 ms. Allocated memory is still 96.5 MB. Free memory was 71.5 MB in the beginning and 56.2 MB in the end (delta: 15.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-12-09 20:49:29,487 INFO L168 Benchmark]: TraceAbstraction took 500987.74 ms. Allocated memory was 96.5 MB in the beginning and 172.0 MB in the end (delta: 75.5 MB). Free memory was 55.5 MB in the beginning and 126.3 MB in the end (delta: -70.8 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-12-09 20:49:29,489 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 96.5 MB. Free memory was 79.1 MB in the beginning and 78.9 MB in the end (delta: 138.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 159.69 ms. Allocated memory is still 96.5 MB. Free memory was 62.8 MB in the beginning and 74.0 MB in the end (delta: -11.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 22.08 ms. Allocated memory is still 96.5 MB. Free memory was 74.0 MB in the beginning and 72.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 13.41 ms. Allocated memory is still 96.5 MB. Free memory was 72.6 MB in the beginning and 71.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 226.54 ms. Allocated memory is still 96.5 MB. Free memory was 71.5 MB in the beginning and 56.2 MB in the end (delta: 15.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 500987.74 ms. Allocated memory was 96.5 MB in the beginning and 172.0 MB in the end (delta: 75.5 MB). Free memory was 55.5 MB in the beginning and 126.3 MB in the end (delta: -70.8 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:209) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...