./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark20_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_4716b8bc-2748-4475-b2e0-c09b6e382430/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4716b8bc-2748-4475-b2e0-c09b6e382430/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4716b8bc-2748-4475-b2e0-c09b6e382430/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4716b8bc-2748-4475-b2e0-c09b6e382430/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark20_conjunctive.i -s /tmp/vcloud-vcloud-master/worker/run_dir_4716b8bc-2748-4475-b2e0-c09b6e382430/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4716b8bc-2748-4475-b2e0-c09b6e382430/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 f633d6d31a5ab4cff0448367c5d8cec927cf3a8f .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis No suitable file found in config dir /tmp/vcloud-vcloud-master/worker/run_dir_4716b8bc-2748-4475-b2e0-c09b6e382430/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 08:13:36,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 08:13:36,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 08:13:36,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 08:13:36,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 08:13:36,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 08:13:36,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 08:13:36,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 08:13:36,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 08:13:36,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 08:13:36,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 08:13:36,963 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 08:13:36,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 08:13:36,965 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 08:13:36,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 08:13:36,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 08:13:36,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 08:13:36,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 08:13:36,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 08:13:36,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 08:13:36,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 08:13:36,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 08:13:36,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 08:13:36,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 08:13:36,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 08:13:36,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 08:13:36,982 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 08:13:36,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 08:13:36,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 08:13:36,985 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 08:13:36,985 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 08:13:36,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 08:13:36,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 08:13:36,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 08:13:36,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 08:13:36,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 08:13:36,990 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 08:13:36,990 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 08:13:36,990 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 08:13:36,991 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 08:13:36,992 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 08:13:36,992 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4716b8bc-2748-4475-b2e0-c09b6e382430/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2020-12-09 08:13:37,014 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 08:13:37,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 08:13:37,015 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 08:13:37,015 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 08:13:37,015 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 08:13:37,016 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 08:13:37,016 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 08:13:37,016 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 08:13:37,016 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 08:13:37,016 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 08:13:37,016 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 08:13:37,017 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 08:13:37,017 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 08:13:37,017 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 08:13:37,017 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 08:13:37,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 08:13:37,018 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 08:13:37,018 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 08:13:37,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 08:13:37,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 08:13:37,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 08:13:37,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 08:13:37,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 08:13:37,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 08:13:37,019 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-09 08:13:37,019 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 08:13:37,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 08:13:37,020 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 08:13:37,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 08:13:37,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 08:13:37,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 08:13:37,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:13:37,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 08:13:37,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 08:13:37,021 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 08:13:37,021 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 08:13:37,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 08:13:37,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 08:13:37,022 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 08:13:37,022 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 08:13:37,022 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_4716b8bc-2748-4475-b2e0-c09b6e382430/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4716b8bc-2748-4475-b2e0-c09b6e382430/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f633d6d31a5ab4cff0448367c5d8cec927cf3a8f [2020-12-09 08:13:37,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 08:13:37,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 08:13:37,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 08:13:37,219 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 08:13:37,219 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 08:13:37,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4716b8bc-2748-4475-b2e0-c09b6e382430/bin/utaipan/../../sv-benchmarks/c/loop-zilu/benchmark20_conjunctive.i [2020-12-09 08:13:37,260 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4716b8bc-2748-4475-b2e0-c09b6e382430/bin/utaipan/data/c1175d5ef/6f9f3009b922474cb741ba96aa85c34d/FLAGd722ea917 [2020-12-09 08:13:37,609 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 08:13:37,609 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4716b8bc-2748-4475-b2e0-c09b6e382430/sv-benchmarks/c/loop-zilu/benchmark20_conjunctive.i [2020-12-09 08:13:37,613 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4716b8bc-2748-4475-b2e0-c09b6e382430/bin/utaipan/data/c1175d5ef/6f9f3009b922474cb741ba96aa85c34d/FLAGd722ea917 [2020-12-09 08:13:37,628 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4716b8bc-2748-4475-b2e0-c09b6e382430/bin/utaipan/data/c1175d5ef/6f9f3009b922474cb741ba96aa85c34d [2020-12-09 08:13:37,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 08:13:37,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 08:13:37,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 08:13:37,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 08:13:37,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 08:13:37,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:13:37" (1/1) ... [2020-12-09 08:13:37,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57ecf0a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:13:37, skipping insertion in model container [2020-12-09 08:13:37,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:13:37" (1/1) ... [2020-12-09 08:13:37,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 08:13:37,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 08:13:37,754 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_4716b8bc-2748-4475-b2e0-c09b6e382430/sv-benchmarks/c/loop-zilu/benchmark20_conjunctive.i[873,886] [2020-12-09 08:13:37,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:13:37,768 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 08:13:37,778 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_4716b8bc-2748-4475-b2e0-c09b6e382430/sv-benchmarks/c/loop-zilu/benchmark20_conjunctive.i[873,886] [2020-12-09 08:13:37,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:13:37,789 INFO L208 MainTranslator]: Completed translation [2020-12-09 08:13:37,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:13:37 WrapperNode [2020-12-09 08:13:37,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 08:13:37,791 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 08:13:37,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 08:13:37,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 08:13:37,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:13:37" (1/1) ... [2020-12-09 08:13:37,801 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:13:37" (1/1) ... [2020-12-09 08:13:37,812 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 08:13:37,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 08:13:37,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 08:13:37,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 08:13:37,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:13:37" (1/1) ... [2020-12-09 08:13:37,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:13:37" (1/1) ... [2020-12-09 08:13:37,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:13:37" (1/1) ... [2020-12-09 08:13:37,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:13:37" (1/1) ... [2020-12-09 08:13:37,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:13:37" (1/1) ... [2020-12-09 08:13:37,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:13:37" (1/1) ... [2020-12-09 08:13:37,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:13:37" (1/1) ... [2020-12-09 08:13:37,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 08:13:37,827 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 08:13:37,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 08:13:37,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 08:13:37,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:13:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4716b8bc-2748-4475-b2e0-c09b6e382430/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 08:13:37,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 08:13:37,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 08:13:37,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 08:13:37,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 08:13:38,095 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 08:13:38,096 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 08:13:38,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:13:38 BoogieIcfgContainer [2020-12-09 08:13:38,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 08:13:38,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 08:13:38,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 08:13:38,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 08:13:38,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:13:37" (1/3) ... [2020-12-09 08:13:38,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd2bda4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:13:38, skipping insertion in model container [2020-12-09 08:13:38,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:13:37" (2/3) ... [2020-12-09 08:13:38,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd2bda4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:13:38, skipping insertion in model container [2020-12-09 08:13:38,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:13:38" (3/3) ... [2020-12-09 08:13:38,105 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark20_conjunctive.i [2020-12-09 08:13:38,118 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 08:13:38,121 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-09 08:13:38,130 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-09 08:13:38,152 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 08:13:38,152 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 08:13:38,153 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 08:13:38,153 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 08:13:38,153 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 08:13:38,153 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 08:13:38,153 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 08:13:38,153 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 08:13:38,165 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-09 08:13:38,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 08:13:38,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:13:38,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 08:13:38,171 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 08:13:38,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:13:38,176 INFO L82 PathProgramCache]: Analyzing trace with hash 2092610, now seen corresponding path program 1 times [2020-12-09 08:13:38,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:13:38,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806394967] [2020-12-09 08:13:38,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:13:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:13:38,307 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 08:13:38,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806394967] [2020-12-09 08:13:38,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:13:38,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:13:38,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791837567] [2020-12-09 08:13:38,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 08:13:38,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:13:38,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 08:13:38,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:13:38,326 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 3 states. [2020-12-09 08:13:38,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:13:38,366 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2020-12-09 08:13:38,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 08:13:38,368 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 08:13:38,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:13:38,374 INFO L225 Difference]: With dead ends: 19 [2020-12-09 08:13:38,374 INFO L226 Difference]: Without dead ends: 14 [2020-12-09 08:13:38,376 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 08:13:38,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-09 08:13:38,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-12-09 08:13:38,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-09 08:13:38,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-09 08:13:38,398 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 4 [2020-12-09 08:13:38,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:13:38,398 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-09 08:13:38,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 08:13:38,398 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-09 08:13:38,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 08:13:38,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:13:38,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 08:13:38,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 08:13:38,399 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 08:13:38,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:13:38,400 INFO L82 PathProgramCache]: Analyzing trace with hash 64870960, now seen corresponding path program 1 times [2020-12-09 08:13:38,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:13:38,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287092621] [2020-12-09 08:13:38,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:13:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:13:38,424 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 08:13:38,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287092621] [2020-12-09 08:13:38,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:13:38,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:13:38,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456367356] [2020-12-09 08:13:38,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 08:13:38,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:13:38,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 08:13:38,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:13:38,427 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2020-12-09 08:13:38,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:13:38,445 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-09 08:13:38,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 08:13:38,446 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 08:13:38,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:13:38,446 INFO L225 Difference]: With dead ends: 15 [2020-12-09 08:13:38,446 INFO L226 Difference]: Without dead ends: 14 [2020-12-09 08:13:38,447 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 08:13:38,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-09 08:13:38,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-09 08:13:38,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 08:13:38,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-09 08:13:38,451 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 5 [2020-12-09 08:13:38,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:13:38,451 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-09 08:13:38,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 08:13:38,451 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-09 08:13:38,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 08:13:38,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:13:38,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 08:13:38,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 08:13:38,452 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 08:13:38,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:13:38,453 INFO L82 PathProgramCache]: Analyzing trace with hash 2010999812, now seen corresponding path program 1 times [2020-12-09 08:13:38,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:13:38,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720715809] [2020-12-09 08:13:38,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:13:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:13:38,484 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 08:13:38,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720715809] [2020-12-09 08:13:38,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:13:38,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 08:13:38,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849559981] [2020-12-09 08:13:38,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:13:38,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:13:38,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:13:38,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:13:38,486 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2020-12-09 08:13:38,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:13:38,514 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-09 08:13:38,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 08:13:38,515 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 08:13:38,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:13:38,516 INFO L225 Difference]: With dead ends: 18 [2020-12-09 08:13:38,516 INFO L226 Difference]: Without dead ends: 17 [2020-12-09 08:13:38,516 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 08:13:38,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-09 08:13:38,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2020-12-09 08:13:38,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 08:13:38,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-09 08:13:38,520 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 6 [2020-12-09 08:13:38,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:13:38,520 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-09 08:13:38,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:13:38,521 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-09 08:13:38,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 08:13:38,521 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:13:38,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:13:38,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 08:13:38,522 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 08:13:38,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:13:38,522 INFO L82 PathProgramCache]: Analyzing trace with hash -2083515214, now seen corresponding path program 1 times [2020-12-09 08:13:38,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:13:38,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731928717] [2020-12-09 08:13:38,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:13:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:13:38,556 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 08:13:38,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731928717] [2020-12-09 08:13:38,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:13:38,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 08:13:38,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577483576] [2020-12-09 08:13:38,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:13:38,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:13:38,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:13:38,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:13:38,559 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2020-12-09 08:13:38,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:13:38,581 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-09 08:13:38,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:13:38,582 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 08:13:38,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:13:38,582 INFO L225 Difference]: With dead ends: 15 [2020-12-09 08:13:38,582 INFO L226 Difference]: Without dead ends: 14 [2020-12-09 08:13:38,583 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 08:13:38,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-09 08:13:38,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-09 08:13:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 08:13:38,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-09 08:13:38,591 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 7 [2020-12-09 08:13:38,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:13:38,591 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-09 08:13:38,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:13:38,591 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-09 08:13:38,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 08:13:38,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:13:38,592 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:13:38,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 08:13:38,593 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 08:13:38,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:13:38,593 INFO L82 PathProgramCache]: Analyzing trace with hash -803359244, now seen corresponding path program 1 times [2020-12-09 08:13:38,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:13:38,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176466597] [2020-12-09 08:13:38,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:13:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:13:38,630 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 08:13:38,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176466597] [2020-12-09 08:13:38,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984221477] [2020-12-09 08:13:38,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4716b8bc-2748-4475-b2e0-c09b6e382430/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 08:13:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:13:38,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 08:13:38,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:13:38,732 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 08:13:38,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:13:38,777 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 08:13:38,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [537299492] [2020-12-09 08:13:38,797 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 08:13:38,798 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:13:38,802 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:13:38,806 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:13:38,807 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:13:39,185 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:13:39,561 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2020-12-09 08:13:39,778 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2020-12-09 08:13:39,977 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2020-12-09 08:13:40,182 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-12-09 08:13:40,244 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:13:40,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:13:40,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2020-12-09 08:13:40,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516446474] [2020-12-09 08:13:40,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 08:13:40,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:13:40,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 08:13:40,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-12-09 08:13:40,246 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2020-12-09 08:13:40,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:13:40,323 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-12-09 08:13:40,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 08:13:40,323 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 9 [2020-12-09 08:13:40,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:13:40,324 INFO L225 Difference]: With dead ends: 25 [2020-12-09 08:13:40,324 INFO L226 Difference]: Without dead ends: 24 [2020-12-09 08:13:40,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-12-09 08:13:40,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-09 08:13:40,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-12-09 08:13:40,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 08:13:40,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-09 08:13:40,327 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 9 [2020-12-09 08:13:40,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:13:40,328 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-09 08:13:40,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 08:13:40,328 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-09 08:13:40,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 08:13:40,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:13:40,328 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 08:13:40,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:13:40,530 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 08:13:40,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:13:40,532 INFO L82 PathProgramCache]: Analyzing trace with hash 865667262, now seen corresponding path program 1 times [2020-12-09 08:13:40,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:13:40,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243050954] [2020-12-09 08:13:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:13:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:13:40,654 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 08:13:40,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243050954] [2020-12-09 08:13:40,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031027681] [2020-12-09 08:13:40,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4716b8bc-2748-4475-b2e0-c09b6e382430/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 08:13:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:13:40,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 08:13:40,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:13:40,767 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 08:13:40,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:13:40,802 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 08:13:40,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 08:13:40,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2020-12-09 08:13:40,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209981929] [2020-12-09 08:13:40,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 08:13:40,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:13:40,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 08:13:40,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-12-09 08:13:40,803 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2020-12-09 08:13:40,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:13:40,836 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-12-09 08:13:40,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 08:13:40,837 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-09 08:13:40,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:13:40,837 INFO L225 Difference]: With dead ends: 22 [2020-12-09 08:13:40,837 INFO L226 Difference]: Without dead ends: 21 [2020-12-09 08:13:40,838 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 08:13:40,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-09 08:13:40,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-09 08:13:40,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 08:13:40,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-09 08:13:40,841 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 10 [2020-12-09 08:13:40,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:13:40,842 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-09 08:13:40,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 08:13:40,842 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-09 08:13:40,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 08:13:40,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:13:40,842 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2020-12-09 08:13:41,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-09 08:13:41,044 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 08:13:41,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:13:41,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1065881398, now seen corresponding path program 1 times [2020-12-09 08:13:41,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:13:41,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314106265] [2020-12-09 08:13:41,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:13:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:13:41,148 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 08:13:41,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314106265] [2020-12-09 08:13:41,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807398260] [2020-12-09 08:13:41,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4716b8bc-2748-4475-b2e0-c09b6e382430/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 08:13:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:13:41,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 08:13:41,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:13:41,231 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 08:13:41,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:13:41,272 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 08:13:41,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [230674699] [2020-12-09 08:13:41,274 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 08:13:41,274 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:13:41,275 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:13:41,275 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:13:41,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:13:41,493 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:13:41,738 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2020-12-09 08:13:41,925 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2020-12-09 08:13:42,108 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2020-12-09 08:13:42,325 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-12-09 08:13:42,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:13:42,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5, 5] total 15 [2020-12-09 08:13:42,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038035632] [2020-12-09 08:13:42,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 08:13:42,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:13:42,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 08:13:42,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-12-09 08:13:42,382 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-12-09 08:13:42,535 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-12-09 08:13:42,689 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-12-09 08:13:42,847 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-12-09 08:13:43,006 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-12-09 08:13:43,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:13:43,018 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-12-09 08:13:43,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 08:13:43,019 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-09 08:13:43,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:13:43,019 INFO L225 Difference]: With dead ends: 21 [2020-12-09 08:13:43,019 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 08:13:43,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-12-09 08:13:43,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 08:13:43,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-09 08:13:43,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 08:13:43,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-09 08:13:43,022 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2020-12-09 08:13:43,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:13:43,023 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-09 08:13:43,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 08:13:43,023 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-09 08:13:43,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 08:13:43,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:13:43,023 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1] [2020-12-09 08:13:43,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-09 08:13:43,225 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 08:13:43,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:13:43,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1075330740, now seen corresponding path program 2 times [2020-12-09 08:13:43,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:13:43,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197990829] [2020-12-09 08:13:43,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:13:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:13:43,292 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 08:13:43,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197990829] [2020-12-09 08:13:43,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332031478] [2020-12-09 08:13:43,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4716b8bc-2748-4475-b2e0-c09b6e382430/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 08:13:43,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-09 08:13:43,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 08:13:43,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 08:13:43,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:13:43,450 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 08:13:43,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:13:43,601 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 08:13:43,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1644458673] [2020-12-09 08:13:43,603 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 08:13:43,603 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:13:43,603 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:13:43,604 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:13:43,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:13:43,792 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:13:44,680 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:13:44,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:13:44,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2020-12-09 08:13:44,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510002898] [2020-12-09 08:13:44,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-09 08:13:44,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:13:44,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-09 08:13:44,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2020-12-09 08:13:44,682 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 23 states. [2020-12-09 08:13:45,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:13:45,202 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-12-09 08:13:45,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-09 08:13:45,202 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 19 [2020-12-09 08:13:45,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:13:45,203 INFO L225 Difference]: With dead ends: 41 [2020-12-09 08:13:45,203 INFO L226 Difference]: Without dead ends: 40 [2020-12-09 08:13:45,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=317, Invalid=1575, Unknown=0, NotChecked=0, Total=1892 [2020-12-09 08:13:45,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-09 08:13:45,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-09 08:13:45,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-09 08:13:45,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-12-09 08:13:45,210 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 19 [2020-12-09 08:13:45,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:13:45,210 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-12-09 08:13:45,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-09 08:13:45,210 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-12-09 08:13:45,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-09 08:13:45,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:13:45,211 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1] [2020-12-09 08:13:45,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:13:45,413 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 08:13:45,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:13:45,414 INFO L82 PathProgramCache]: Analyzing trace with hash 237862964, now seen corresponding path program 3 times [2020-12-09 08:13:45,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:13:45,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104588158] [2020-12-09 08:13:45,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:13:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:13:45,615 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 08:13:45,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104588158] [2020-12-09 08:13:45,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626111887] [2020-12-09 08:13:45,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4716b8bc-2748-4475-b2e0-c09b6e382430/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 08:13:45,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 08:13:45,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 08:13:45,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-09 08:13:45,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:13:45,989 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 08:13:45,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:14:13,124 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 08:14:13,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1742168501] [2020-12-09 08:14:13,125 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 08:14:13,126 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:14:13,126 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:14:13,126 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:14:13,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:14:13,279 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:14:13,504 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 29 [2020-12-09 08:14:13,948 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2020-12-09 08:14:14,270 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2020-12-09 08:14:14,572 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2020-12-09 08:14:14,865 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-12-09 08:14:14,969 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:14:14,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:14:14,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2020-12-09 08:14:14,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781925337] [2020-12-09 08:14:14,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-09 08:14:14,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:14:14,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-09 08:14:14,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=2564, Unknown=13, NotChecked=0, Total=2862 [2020-12-09 08:14:14,971 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 47 states. [2020-12-09 08:16:14,042 WARN L197 SmtUtils]: Spent 31.91 s on a formula simplification. DAG size of input: 113 DAG size of output: 67 [2020-12-09 08:16:24,765 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 25 [2020-12-09 08:16:33,969 WARN L197 SmtUtils]: Spent 6.19 s on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-12-09 08:16:35,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:16:35,774 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2020-12-09 08:16:35,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-09 08:16:35,777 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 39 [2020-12-09 08:16:35,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:16:35,778 INFO L225 Difference]: With dead ends: 81 [2020-12-09 08:16:35,778 INFO L226 Difference]: Without dead ends: 80 [2020-12-09 08:16:35,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 166.8s TimeCoverageRelationStatistics Valid=979, Invalid=5610, Unknown=53, NotChecked=0, Total=6642 [2020-12-09 08:16:35,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-09 08:16:35,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-12-09 08:16:35,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-09 08:16:35,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2020-12-09 08:16:35,787 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 39 [2020-12-09 08:16:35,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:16:35,787 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2020-12-09 08:16:35,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-09 08:16:35,787 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2020-12-09 08:16:35,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-09 08:16:35,789 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:16:35,789 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1] [2020-12-09 08:16:35,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-12-09 08:16:35,990 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 08:16:35,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:16:35,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1923662644, now seen corresponding path program 4 times [2020-12-09 08:16:35,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:16:35,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069181847] [2020-12-09 08:16:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:16:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:16:37,858 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 08:16:37,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069181847] [2020-12-09 08:16:37,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878207446] [2020-12-09 08:16:37,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4716b8bc-2748-4475-b2e0-c09b6e382430/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 08:16:37,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:16:37,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-09 08:16:37,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:16:44,498 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 08:16:44,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:21:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 506 refuted. 49 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:21:41,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [339756252] [2020-12-09 08:21:41,915 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 08:21:41,915 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:21:41,915 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:21:41,915 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:21:41,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:21:42,179 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:21:43,099 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 29 [2020-12-09 08:21:43,960 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-12-09 08:21:45,344 WARN L197 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2020-12-09 08:21:46,796 WARN L197 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2020-12-09 08:21:48,262 WARN L197 SmtUtils]: Spent 826.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2020-12-09 08:21:49,650 WARN L197 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-12-09 08:21:50,233 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2020-12-09 08:21:50,237 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:21:50,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:21:50,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 94 [2020-12-09 08:21:50,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166839027] [2020-12-09 08:21:50,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-12-09 08:21:50,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:21:50,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-12-09 08:21:50,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=933, Invalid=9255, Unknown=114, NotChecked=0, Total=10302 [2020-12-09 08:21:50,242 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 95 states. [2020-12-09 08:21:51,291 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 21 [2020-12-09 08:21:54,093 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 22 [2020-12-09 08:22:11,059 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-12-09 08:22:11,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-09 08:22:11,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:22:11,263 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 08:22:11,272 INFO L168 Benchmark]: Toolchain (without parser) took 513638.84 ms. Allocated memory was 86.0 MB in the beginning and 125.8 MB in the end (delta: 39.8 MB). Free memory was 66.6 MB in the beginning and 44.1 MB in the end (delta: 22.5 MB). Peak memory consumption was 61.0 MB. Max. memory is 16.1 GB. [2020-12-09 08:22:11,273 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 86.0 MB. Free memory is still 62.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:22:11,275 INFO L168 Benchmark]: CACSL2BoogieTranslator took 157.70 ms. Allocated memory is still 86.0 MB. Free memory was 66.3 MB in the beginning and 57.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 08:22:11,276 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.65 ms. Allocated memory is still 86.0 MB. Free memory was 57.0 MB in the beginning and 55.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:22:11,277 INFO L168 Benchmark]: Boogie Preprocessor took 13.73 ms. Allocated memory is still 86.0 MB. Free memory was 55.5 MB in the beginning and 54.5 MB in the end (delta: 948.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:22:11,278 INFO L168 Benchmark]: RCFGBuilder took 270.90 ms. Allocated memory is still 86.0 MB. Free memory was 54.5 MB in the beginning and 56.3 MB in the end (delta: -1.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 08:22:11,278 INFO L168 Benchmark]: TraceAbstraction took 513170.37 ms. Allocated memory was 86.0 MB in the beginning and 125.8 MB in the end (delta: 39.8 MB). Free memory was 55.7 MB in the beginning and 44.1 MB in the end (delta: 11.6 MB). Peak memory consumption was 53.4 MB. Max. memory is 16.1 GB. [2020-12-09 08:22:11,280 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 86.0 MB. Free memory is still 62.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 157.70 ms. Allocated memory is still 86.0 MB. Free memory was 66.3 MB in the beginning and 57.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 21.65 ms. Allocated memory is still 86.0 MB. Free memory was 57.0 MB in the beginning and 55.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 13.73 ms. Allocated memory is still 86.0 MB. Free memory was 55.5 MB in the beginning and 54.5 MB in the end (delta: 948.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 270.90 ms. Allocated memory is still 86.0 MB. Free memory was 54.5 MB in the beginning and 56.3 MB in the end (delta: -1.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 513170.37 ms. Allocated memory was 86.0 MB in the beginning and 125.8 MB in the end (delta: 39.8 MB). Free memory was 55.7 MB in the beginning and 44.1 MB in the end (delta: 11.6 MB). Peak memory consumption was 53.4 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...