./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V --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 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 01:54:12,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 01:54:12,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 01:54:12,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 01:54:12,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 01:54:12,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 01:54:12,995 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 01:54:13,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 01:54:13,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 01:54:13,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 01:54:13,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 01:54:13,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 01:54:13,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 01:54:13,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 01:54:13,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 01:54:13,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 01:54:13,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 01:54:13,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 01:54:13,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 01:54:13,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 01:54:13,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 01:54:13,049 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 01:54:13,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 01:54:13,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 01:54:13,065 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 01:54:13,066 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 01:54:13,066 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 01:54:13,069 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 01:54:13,070 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 01:54:13,071 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 01:54:13,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 01:54:13,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 01:54:13,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 01:54:13,077 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 01:54:13,078 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 01:54:13,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 01:54:13,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 01:54:13,080 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 01:54:13,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 01:54:13,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 01:54:13,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 01:54:13,083 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/config/svcomp-Overflow-32bit-Taipan_Default.epf [2021-11-23 01:54:13,134 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 01:54:13,134 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 01:54:13,135 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 01:54:13,135 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 01:54:13,136 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 01:54:13,136 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 01:54:13,137 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 01:54:13,137 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 01:54:13,137 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 01:54:13,137 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 01:54:13,138 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 01:54:13,139 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 01:54:13,139 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 01:54:13,139 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 01:54:13,139 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 01:54:13,140 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 01:54:13,140 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 01:54:13,140 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 01:54:13,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 01:54:13,141 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 01:54:13,141 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 01:54:13,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 01:54:13,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 01:54:13,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 01:54:13,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 01:54:13,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 01:54:13,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 01:54:13,145 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-23 01:54:13,145 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 01:54:13,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 01:54:13,145 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 01:54:13,146 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 01:54:13,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 01:54:13,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 01:54:13,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:54:13,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 01:54:13,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 01:54:13,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 01:54:13,147 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 01:54:13,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 01:54:13,148 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 01:54:13,148 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 01:54:13,148 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 01:54:13,148 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_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2021-11-23 01:54:13,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 01:54:13,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 01:54:13,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 01:54:13,535 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 01:54:13,536 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 01:54:13,538 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2021-11-23 01:54:13,617 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/data/0fb8ca7a0/2f0f381da066404db9f2ed27dd84ccf3/FLAGb7077b5a4 [2021-11-23 01:54:14,217 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 01:54:14,218 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2021-11-23 01:54:14,239 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/data/0fb8ca7a0/2f0f381da066404db9f2ed27dd84ccf3/FLAGb7077b5a4 [2021-11-23 01:54:14,539 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/data/0fb8ca7a0/2f0f381da066404db9f2ed27dd84ccf3 [2021-11-23 01:54:14,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 01:54:14,544 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 01:54:14,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 01:54:14,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 01:54:14,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 01:54:14,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:54:14" (1/1) ... [2021-11-23 01:54:14,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e991769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:14, skipping insertion in model container [2021-11-23 01:54:14,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:54:14" (1/1) ... [2021-11-23 01:54:14,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 01:54:14,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 01:54:14,909 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2021-11-23 01:54:14,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:54:14,987 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 01:54:15,003 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2021-11-23 01:54:15,044 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:54:15,071 INFO L208 MainTranslator]: Completed translation [2021-11-23 01:54:15,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:15 WrapperNode [2021-11-23 01:54:15,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 01:54:15,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 01:54:15,073 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 01:54:15,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 01:54:15,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:15" (1/1) ... [2021-11-23 01:54:15,093 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:15" (1/1) ... [2021-11-23 01:54:15,148 INFO L137 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 124 [2021-11-23 01:54:15,150 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 01:54:15,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 01:54:15,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 01:54:15,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 01:54:15,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:15" (1/1) ... [2021-11-23 01:54:15,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:15" (1/1) ... [2021-11-23 01:54:15,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:15" (1/1) ... [2021-11-23 01:54:15,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:15" (1/1) ... [2021-11-23 01:54:15,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:15" (1/1) ... [2021-11-23 01:54:15,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:15" (1/1) ... [2021-11-23 01:54:15,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:15" (1/1) ... [2021-11-23 01:54:15,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 01:54:15,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 01:54:15,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 01:54:15,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 01:54:15,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:15" (1/1) ... [2021-11-23 01:54:15,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:54:15,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:54:15,274 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 01:54:15,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 01:54:15,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 01:54:15,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 01:54:15,339 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-23 01:54:15,340 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-23 01:54:15,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 01:54:15,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 01:54:15,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 01:54:15,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 01:54:15,448 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 01:54:15,450 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 01:54:15,767 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 01:54:15,873 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 01:54:15,873 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 01:54:15,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:54:15 BoogieIcfgContainer [2021-11-23 01:54:15,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 01:54:15,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 01:54:15,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 01:54:15,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 01:54:15,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:54:14" (1/3) ... [2021-11-23 01:54:15,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76fea984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:54:15, skipping insertion in model container [2021-11-23 01:54:15,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:15" (2/3) ... [2021-11-23 01:54:15,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76fea984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:54:15, skipping insertion in model container [2021-11-23 01:54:15,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:54:15" (3/3) ... [2021-11-23 01:54:15,885 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2021-11-23 01:54:15,891 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 01:54:15,891 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2021-11-23 01:54:15,943 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 01:54:15,952 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 01:54:15,952 INFO L340 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2021-11-23 01:54:15,977 INFO L276 IsEmpty]: Start isEmpty. Operand has 71 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 64 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 01:54:15,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 01:54:15,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:15,984 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:15,985 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting base2fltErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-23 01:54:15,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:15,992 INFO L85 PathProgramCache]: Analyzing trace with hash 569497008, now seen corresponding path program 1 times [2021-11-23 01:54:16,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:16,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188544137] [2021-11-23 01:54:16,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:16,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:54:16,189 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:16,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188544137] [2021-11-23 01:54:16,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188544137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:54:16,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:54:16,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:54:16,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228791932] [2021-11-23 01:54:16,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:54:16,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 01:54:16,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:16,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 01:54:16,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 01:54:16,260 INFO L87 Difference]: Start difference. First operand has 71 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 64 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:54:16,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:16,363 INFO L93 Difference]: Finished difference Result 138 states and 177 transitions. [2021-11-23 01:54:16,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 01:54:16,367 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 01:54:16,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:16,382 INFO L225 Difference]: With dead ends: 138 [2021-11-23 01:54:16,382 INFO L226 Difference]: Without dead ends: 62 [2021-11-23 01:54:16,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 01:54:16,394 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:16,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:54:16,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-23 01:54:16,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-23 01:54:16,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 56 states have internal predecessors, (63), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 01:54:16,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-11-23 01:54:16,484 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 8 [2021-11-23 01:54:16,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:16,485 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-11-23 01:54:16,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:54:16,486 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-11-23 01:54:16,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 01:54:16,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:16,488 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:16,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 01:54:16,489 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-23 01:54:16,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:16,495 INFO L85 PathProgramCache]: Analyzing trace with hash 568405826, now seen corresponding path program 1 times [2021-11-23 01:54:16,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:16,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146755939] [2021-11-23 01:54:16,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:16,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:54:16,608 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:16,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146755939] [2021-11-23 01:54:16,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146755939] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:54:16,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:54:16,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:54:16,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213099474] [2021-11-23 01:54:16,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:54:16,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:54:16,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:16,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:54:16,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:54:16,615 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:54:16,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:16,772 INFO L93 Difference]: Finished difference Result 160 states and 194 transitions. [2021-11-23 01:54:16,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:54:16,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 01:54:16,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:16,779 INFO L225 Difference]: With dead ends: 160 [2021-11-23 01:54:16,780 INFO L226 Difference]: Without dead ends: 100 [2021-11-23 01:54:16,784 INFO L932 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 [2021-11-23 01:54:16,788 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 53 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:16,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 167 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:54:16,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-23 01:54:16,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 92. [2021-11-23 01:54:16,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 70 states have (on average 1.5) internal successors, (105), 85 states have internal predecessors, (105), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 01:54:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 113 transitions. [2021-11-23 01:54:16,834 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 113 transitions. Word has length 8 [2021-11-23 01:54:16,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:16,835 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 113 transitions. [2021-11-23 01:54:16,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:54:16,837 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 113 transitions. [2021-11-23 01:54:16,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 01:54:16,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:16,842 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:16,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 01:54:16,843 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting base2fltErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-23 01:54:16,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:16,844 INFO L85 PathProgramCache]: Analyzing trace with hash -479290295, now seen corresponding path program 1 times [2021-11-23 01:54:16,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:16,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537602302] [2021-11-23 01:54:16,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:16,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:54:16,950 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:16,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537602302] [2021-11-23 01:54:16,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537602302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:54:16,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:54:16,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:54:16,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510865555] [2021-11-23 01:54:16,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:54:16,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:54:16,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:16,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:54:16,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:54:16,956 INFO L87 Difference]: Start difference. First operand 92 states and 113 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:54:17,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:17,093 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2021-11-23 01:54:17,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:54:17,094 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 01:54:17,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:17,096 INFO L225 Difference]: With dead ends: 108 [2021-11-23 01:54:17,096 INFO L226 Difference]: Without dead ends: 106 [2021-11-23 01:54:17,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:54:17,099 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 66 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:17,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 223 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:54:17,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-23 01:54:17,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-11-23 01:54:17,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 72 states have (on average 1.4722222222222223) internal successors, (106), 87 states have internal predecessors, (106), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 01:54:17,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 114 transitions. [2021-11-23 01:54:17,114 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 114 transitions. Word has length 12 [2021-11-23 01:54:17,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:17,115 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 114 transitions. [2021-11-23 01:54:17,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:54:17,115 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 114 transitions. [2021-11-23 01:54:17,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 01:54:17,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:17,117 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:17,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 01:54:17,117 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting base2fltErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-23 01:54:17,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:17,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1973097156, now seen corresponding path program 1 times [2021-11-23 01:54:17,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:17,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646427263] [2021-11-23 01:54:17,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:17,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:54:17,175 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:17,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646427263] [2021-11-23 01:54:17,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646427263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:54:17,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:54:17,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:54:17,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56814084] [2021-11-23 01:54:17,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:54:17,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:54:17,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:17,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:54:17,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:54:17,179 INFO L87 Difference]: Start difference. First operand 94 states and 114 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:54:17,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:17,283 INFO L93 Difference]: Finished difference Result 204 states and 248 transitions. [2021-11-23 01:54:17,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:54:17,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 01:54:17,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:17,286 INFO L225 Difference]: With dead ends: 204 [2021-11-23 01:54:17,287 INFO L226 Difference]: Without dead ends: 112 [2021-11-23 01:54:17,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:54:17,289 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 87 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:17,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 177 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:54:17,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-23 01:54:17,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 98. [2021-11-23 01:54:17,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 91 states have internal predecessors, (110), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 01:54:17,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 118 transitions. [2021-11-23 01:54:17,305 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 118 transitions. Word has length 13 [2021-11-23 01:54:17,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:17,306 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 118 transitions. [2021-11-23 01:54:17,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:54:17,306 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 118 transitions. [2021-11-23 01:54:17,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 01:54:17,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:17,308 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:17,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 01:54:17,308 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-23 01:54:17,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:17,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1639843504, now seen corresponding path program 1 times [2021-11-23 01:54:17,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:17,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113293309] [2021-11-23 01:54:17,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:17,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 01:54:17,341 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:17,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113293309] [2021-11-23 01:54:17,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113293309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:54:17,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:54:17,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:54:17,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794986523] [2021-11-23 01:54:17,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:54:17,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:54:17,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:17,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:54:17,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:54:17,344 INFO L87 Difference]: Start difference. First operand 98 states and 118 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:54:17,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:17,378 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2021-11-23 01:54:17,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:54:17,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 01:54:17,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:17,380 INFO L225 Difference]: With dead ends: 102 [2021-11-23 01:54:17,380 INFO L226 Difference]: Without dead ends: 101 [2021-11-23 01:54:17,381 INFO L932 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 [2021-11-23 01:54:17,382 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 3 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:17,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 123 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:54:17,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-23 01:54:17,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2021-11-23 01:54:17,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 75 states have (on average 1.4266666666666667) internal successors, (107), 89 states have internal predecessors, (107), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 01:54:17,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 115 transitions. [2021-11-23 01:54:17,395 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 115 transitions. Word has length 14 [2021-11-23 01:54:17,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:17,396 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 115 transitions. [2021-11-23 01:54:17,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:54:17,396 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 115 transitions. [2021-11-23 01:54:17,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 01:54:17,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:17,398 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:17,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 01:54:17,398 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting base2fltErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-23 01:54:17,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:17,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1639845682, now seen corresponding path program 1 times [2021-11-23 01:54:17,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:17,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144077907] [2021-11-23 01:54:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:17,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:54:17,450 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:17,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144077907] [2021-11-23 01:54:17,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144077907] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:54:17,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955814548] [2021-11-23 01:54:17,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:17,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:17,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:54:17,453 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:54:17,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 01:54:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:17,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 01:54:17,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:54:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:54:17,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:54:17,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955814548] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:54:17,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:54:17,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-23 01:54:17,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801845198] [2021-11-23 01:54:17,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:54:17,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:54:17,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:17,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:54:17,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:54:17,686 INFO L87 Difference]: Start difference. First operand 96 states and 115 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:54:17,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:17,751 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2021-11-23 01:54:17,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:54:17,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 01:54:17,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:17,753 INFO L225 Difference]: With dead ends: 112 [2021-11-23 01:54:17,754 INFO L226 Difference]: Without dead ends: 111 [2021-11-23 01:54:17,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:54:17,755 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 8 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:17,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 191 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:54:17,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-23 01:54:17,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 98. [2021-11-23 01:54:17,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 77 states have (on average 1.4155844155844155) internal successors, (109), 91 states have internal predecessors, (109), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 01:54:17,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 117 transitions. [2021-11-23 01:54:17,769 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 117 transitions. Word has length 14 [2021-11-23 01:54:17,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:17,770 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 117 transitions. [2021-11-23 01:54:17,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:54:17,770 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 117 transitions. [2021-11-23 01:54:17,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 01:54:17,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:17,775 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:17,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 01:54:17,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 01:54:17,994 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-23 01:54:17,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:17,994 INFO L85 PathProgramCache]: Analyzing trace with hash -381684116, now seen corresponding path program 1 times [2021-11-23 01:54:17,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:17,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939097900] [2021-11-23 01:54:17,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:17,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 01:54:18,049 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:18,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939097900] [2021-11-23 01:54:18,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939097900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:54:18,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:54:18,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:54:18,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142806974] [2021-11-23 01:54:18,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:54:18,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:54:18,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:18,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:54:18,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:54:18,053 INFO L87 Difference]: Start difference. First operand 98 states and 117 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 01:54:18,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:18,143 INFO L93 Difference]: Finished difference Result 136 states and 164 transitions. [2021-11-23 01:54:18,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:54:18,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-11-23 01:54:18,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:18,146 INFO L225 Difference]: With dead ends: 136 [2021-11-23 01:54:18,146 INFO L226 Difference]: Without dead ends: 134 [2021-11-23 01:54:18,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:54:18,148 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 86 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:18,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 176 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:54:18,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-23 01:54:18,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 116. [2021-11-23 01:54:18,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 94 states have (on average 1.4361702127659575) internal successors, (135), 108 states have internal predecessors, (135), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 01:54:18,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 143 transitions. [2021-11-23 01:54:18,161 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 143 transitions. Word has length 20 [2021-11-23 01:54:18,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:18,162 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 143 transitions. [2021-11-23 01:54:18,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 01:54:18,162 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 143 transitions. [2021-11-23 01:54:18,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 01:54:18,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:18,164 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:18,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 01:54:18,165 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting base2fltErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-23 01:54:18,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:18,166 INFO L85 PathProgramCache]: Analyzing trace with hash -404117582, now seen corresponding path program 1 times [2021-11-23 01:54:18,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:18,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492376955] [2021-11-23 01:54:18,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:18,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 01:54:18,204 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:18,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492376955] [2021-11-23 01:54:18,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492376955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:54:18,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:54:18,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:54:18,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733402816] [2021-11-23 01:54:18,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:54:18,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:54:18,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:18,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:54:18,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:54:18,207 INFO L87 Difference]: Start difference. First operand 116 states and 143 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:54:18,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:18,259 INFO L93 Difference]: Finished difference Result 142 states and 175 transitions. [2021-11-23 01:54:18,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:54:18,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 01:54:18,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:18,262 INFO L225 Difference]: With dead ends: 142 [2021-11-23 01:54:18,263 INFO L226 Difference]: Without dead ends: 140 [2021-11-23 01:54:18,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:54:18,264 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 8 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:18,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 178 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:54:18,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-23 01:54:18,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 116. [2021-11-23 01:54:18,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 95 states have (on average 1.4) internal successors, (133), 108 states have internal predecessors, (133), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 01:54:18,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 141 transitions. [2021-11-23 01:54:18,292 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 141 transitions. Word has length 18 [2021-11-23 01:54:18,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:18,293 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 141 transitions. [2021-11-23 01:54:18,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:54:18,294 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 141 transitions. [2021-11-23 01:54:18,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 01:54:18,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:18,297 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:18,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 01:54:18,298 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting base2fltErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-23 01:54:18,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:18,298 INFO L85 PathProgramCache]: Analyzing trace with hash -838765420, now seen corresponding path program 1 times [2021-11-23 01:54:18,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:18,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263268782] [2021-11-23 01:54:18,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:18,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 01:54:18,394 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:18,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263268782] [2021-11-23 01:54:18,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263268782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:54:18,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:54:18,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:54:18,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272398747] [2021-11-23 01:54:18,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:54:18,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:54:18,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:18,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:54:18,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:54:18,397 INFO L87 Difference]: Start difference. First operand 116 states and 141 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 01:54:18,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:18,478 INFO L93 Difference]: Finished difference Result 129 states and 154 transitions. [2021-11-23 01:54:18,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:54:18,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-11-23 01:54:18,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:18,480 INFO L225 Difference]: With dead ends: 129 [2021-11-23 01:54:18,481 INFO L226 Difference]: Without dead ends: 127 [2021-11-23 01:54:18,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:54:18,482 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 73 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:18,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 177 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:54:18,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-23 01:54:18,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 113. [2021-11-23 01:54:18,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 92 states have (on average 1.391304347826087) internal successors, (128), 105 states have internal predecessors, (128), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 01:54:18,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2021-11-23 01:54:18,493 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 22 [2021-11-23 01:54:18,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:18,494 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2021-11-23 01:54:18,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 01:54:18,494 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2021-11-23 01:54:18,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 01:54:18,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:18,496 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:18,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 01:54:18,496 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-23 01:54:18,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:18,497 INFO L85 PathProgramCache]: Analyzing trace with hash -37307548, now seen corresponding path program 1 times [2021-11-23 01:54:18,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:18,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493975927] [2021-11-23 01:54:18,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:18,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 01:54:18,546 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:18,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493975927] [2021-11-23 01:54:18,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493975927] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:54:18,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:54:18,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:54:18,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116868122] [2021-11-23 01:54:18,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:54:18,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:54:18,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:18,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:54:18,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:54:18,550 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 01:54:18,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:18,627 INFO L93 Difference]: Finished difference Result 124 states and 150 transitions. [2021-11-23 01:54:18,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:54:18,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-11-23 01:54:18,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:18,630 INFO L225 Difference]: With dead ends: 124 [2021-11-23 01:54:18,630 INFO L226 Difference]: Without dead ends: 122 [2021-11-23 01:54:18,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:54:18,631 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 82 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:18,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 168 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:54:18,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-23 01:54:18,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 107. [2021-11-23 01:54:18,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 88 states have (on average 1.3636363636363635) internal successors, (120), 99 states have internal predecessors, (120), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 01:54:18,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 128 transitions. [2021-11-23 01:54:18,641 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 128 transitions. Word has length 26 [2021-11-23 01:54:18,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:18,642 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 128 transitions. [2021-11-23 01:54:18,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 01:54:18,642 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 128 transitions. [2021-11-23 01:54:18,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 01:54:18,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:18,644 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:18,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 01:54:18,645 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-23 01:54:18,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:18,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1627575823, now seen corresponding path program 1 times [2021-11-23 01:54:18,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:18,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599215390] [2021-11-23 01:54:18,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:18,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 01:54:18,703 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:18,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599215390] [2021-11-23 01:54:18,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599215390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:54:18,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448509221] [2021-11-23 01:54:18,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:18,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:18,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:54:18,706 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:54:18,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 01:54:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:18,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 01:54:18,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:54:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 01:54:18,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:54:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 01:54:19,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448509221] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 01:54:19,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 01:54:19,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 10] total 16 [2021-11-23 01:54:19,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192647679] [2021-11-23 01:54:19,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:54:19,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:54:19,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:19,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:54:19,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-23 01:54:19,571 INFO L87 Difference]: Start difference. First operand 107 states and 128 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-23 01:54:19,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:19,685 INFO L93 Difference]: Finished difference Result 143 states and 165 transitions. [2021-11-23 01:54:19,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:54:19,687 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-11-23 01:54:19,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:19,688 INFO L225 Difference]: With dead ends: 143 [2021-11-23 01:54:19,689 INFO L226 Difference]: Without dead ends: 111 [2021-11-23 01:54:19,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-23 01:54:19,690 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:19,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 310 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:54:19,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-23 01:54:19,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-11-23 01:54:19,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 88 states have (on average 1.3409090909090908) internal successors, (118), 99 states have internal predecessors, (118), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 01:54:19,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2021-11-23 01:54:19,699 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 28 [2021-11-23 01:54:19,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:19,700 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2021-11-23 01:54:19,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-23 01:54:19,700 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2021-11-23 01:54:19,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 01:54:19,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:19,702 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:19,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 01:54:19,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 01:54:19,929 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting base2fltErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-23 01:54:19,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:19,930 INFO L85 PathProgramCache]: Analyzing trace with hash -605365364, now seen corresponding path program 1 times [2021-11-23 01:54:19,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:19,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373737202] [2021-11-23 01:54:19,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:19,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 01:54:20,005 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:20,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373737202] [2021-11-23 01:54:20,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373737202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:54:20,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:54:20,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:54:20,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251167778] [2021-11-23 01:54:20,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:54:20,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:54:20,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:20,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:54:20,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:54:20,007 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 01:54:20,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:20,095 INFO L93 Difference]: Finished difference Result 118 states and 138 transitions. [2021-11-23 01:54:20,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:54:20,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-11-23 01:54:20,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:20,098 INFO L225 Difference]: With dead ends: 118 [2021-11-23 01:54:20,098 INFO L226 Difference]: Without dead ends: 116 [2021-11-23 01:54:20,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:54:20,099 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 70 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:20,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 168 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:54:20,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-23 01:54:20,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 102. [2021-11-23 01:54:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 85 states have (on average 1.3294117647058823) internal successors, (113), 94 states have internal predecessors, (113), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 01:54:20,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 121 transitions. [2021-11-23 01:54:20,112 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 121 transitions. Word has length 28 [2021-11-23 01:54:20,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:20,112 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 121 transitions. [2021-11-23 01:54:20,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 01:54:20,113 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 121 transitions. [2021-11-23 01:54:20,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 01:54:20,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:20,115 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:20,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 01:54:20,116 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-23 01:54:20,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:20,117 INFO L85 PathProgramCache]: Analyzing trace with hash -2016296670, now seen corresponding path program 1 times [2021-11-23 01:54:20,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:20,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726614215] [2021-11-23 01:54:20,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:20,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:20,186 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 01:54:20,187 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:20,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726614215] [2021-11-23 01:54:20,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726614215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:54:20,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027213767] [2021-11-23 01:54:20,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:20,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:20,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:54:20,189 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:54:20,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 01:54:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:20,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 01:54:20,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:54:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 01:54:20,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:54:20,748 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 01:54:20,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027213767] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:54:20,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [57323412] [2021-11-23 01:54:20,774 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 01:54:20,775 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:54:20,783 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:54:20,790 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:54:20,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:54:21,001 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 58 for LOIs [2021-11-23 01:54:21,121 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:54:22,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [57323412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:54:22,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:54:22,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 9, 7] total 23 [2021-11-23 01:54:22,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031811607] [2021-11-23 01:54:22,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:54:22,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 01:54:22,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:22,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 01:54:22,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-11-23 01:54:22,353 INFO L87 Difference]: Start difference. First operand 102 states and 121 transitions. Second operand has 10 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 01:54:22,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:22,601 INFO L93 Difference]: Finished difference Result 232 states and 274 transitions. [2021-11-23 01:54:22,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 01:54:22,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-11-23 01:54:22,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:22,603 INFO L225 Difference]: With dead ends: 232 [2021-11-23 01:54:22,604 INFO L226 Difference]: Without dead ends: 132 [2021-11-23 01:54:22,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-11-23 01:54:22,605 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 90 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:22,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 359 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:54:22,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-23 01:54:22,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 96. [2021-11-23 01:54:22,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 78 states have (on average 1.3076923076923077) internal successors, (102), 88 states have internal predecessors, (102), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 01:54:22,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2021-11-23 01:54:22,617 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 32 [2021-11-23 01:54:22,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:22,618 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2021-11-23 01:54:22,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 01:54:22,618 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2021-11-23 01:54:22,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 01:54:22,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:22,620 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:22,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 01:54:22,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:22,839 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-23 01:54:22,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:22,840 INFO L85 PathProgramCache]: Analyzing trace with hash -749408735, now seen corresponding path program 1 times [2021-11-23 01:54:22,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:22,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978225777] [2021-11-23 01:54:22,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:22,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 01:54:22,951 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:22,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978225777] [2021-11-23 01:54:22,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978225777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:54:22,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267527267] [2021-11-23 01:54:22,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:22,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:22,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:54:22,954 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:54:22,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 01:54:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:23,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 01:54:23,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:54:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 01:54:23,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:54:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 01:54:23,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267527267] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:54:23,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [264956296] [2021-11-23 01:54:23,525 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-23 01:54:23,525 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:54:23,526 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:54:23,526 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:54:23,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:54:23,990 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2021-11-23 01:54:24,092 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:54:25,929 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4626#(and (<= |ULTIMATE.start_main_~eb~2#1| 127) (= (select |#length| 3) 12) (<= 0 (+ |ULTIMATE.start_main_~ea~2#1| 128)) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (< (+ (ite (<= (mod (div |ULTIMATE.start_mulflt_~a#1| 16777216) 4294967296) 2147483647) (mod (div |ULTIMATE.start_mulflt_~a#1| 16777216) 4294967296) (+ (- 4294967296) (mod (div |ULTIMATE.start_mulflt_~a#1| 16777216) 4294967296))) 2147483520) 0) (= (select |#valid| 1) 1) (or (and (= |ULTIMATE.start_mulflt_#in~b#1| |ULTIMATE.start_mulflt_~b#1|) (<= (mod |ULTIMATE.start_mulflt_#in~b#1| 4294967296) (mod |ULTIMATE.start_mulflt_#in~a#1| 4294967296)) (= |ULTIMATE.start_mulflt_#in~a#1| |ULTIMATE.start_mulflt_~a#1|)) (and (= |ULTIMATE.start_mulflt_#in~b#1| |ULTIMATE.start_mulflt_~a#1|) (= |ULTIMATE.start_mulflt_~tmp~1#1| |ULTIMATE.start_mulflt_~b#1|) (< (mod |ULTIMATE.start_mulflt_#in~a#1| 4294967296) (mod |ULTIMATE.start_mulflt_#in~b#1| 4294967296)) (= |ULTIMATE.start_mulflt_~tmp~1#1| |ULTIMATE.start_mulflt_#in~a#1|))) (= |ULTIMATE.start_mulflt_#in~a#1| |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_mulflt_#in~b#1| |ULTIMATE.start_main_~b~0#1|) (= (select |#valid| 0) 0) (<= 0 (+ |ULTIMATE.start_main_~eb~2#1| 128)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (not (= (mod |ULTIMATE.start_mulflt_~b#1| 4294967296) 0)) (<= |ULTIMATE.start_main_~ea~2#1| 127) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:54:25,929 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:54:25,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:54:25,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 7] total 16 [2021-11-23 01:54:25,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133957014] [2021-11-23 01:54:25,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:54:25,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 01:54:25,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:25,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 01:54:25,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-11-23 01:54:25,933 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand has 16 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 4 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-23 01:54:26,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:26,408 INFO L93 Difference]: Finished difference Result 257 states and 297 transitions. [2021-11-23 01:54:26,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 01:54:26,409 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 4 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 41 [2021-11-23 01:54:26,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:26,410 INFO L225 Difference]: With dead ends: 257 [2021-11-23 01:54:26,410 INFO L226 Difference]: Without dead ends: 146 [2021-11-23 01:54:26,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=230, Invalid=1492, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 01:54:26,413 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 60 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:26,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 645 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:54:26,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-23 01:54:26,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 98. [2021-11-23 01:54:26,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 80 states have (on average 1.2625) internal successors, (101), 89 states have internal predecessors, (101), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 01:54:26,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2021-11-23 01:54:26,425 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 41 [2021-11-23 01:54:26,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:26,426 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2021-11-23 01:54:26,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 4 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-23 01:54:26,426 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2021-11-23 01:54:26,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 01:54:26,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:26,428 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:26,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 01:54:26,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 01:54:26,637 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-23 01:54:26,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:26,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1160168471, now seen corresponding path program 1 times [2021-11-23 01:54:26,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:26,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569856225] [2021-11-23 01:54:26,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:26,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 01:54:26,730 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:26,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569856225] [2021-11-23 01:54:26,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569856225] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:54:26,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265362437] [2021-11-23 01:54:26,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:26,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:26,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:54:26,732 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:54:26,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 01:54:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:26,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 01:54:26,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:54:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 01:54:26,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:54:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 01:54:27,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265362437] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:54:27,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [81020067] [2021-11-23 01:54:27,188 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-23 01:54:27,188 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:54:27,189 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:54:27,189 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:54:27,189 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:54:27,651 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2021-11-23 01:54:27,813 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:54:29,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [81020067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:54:29,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:54:29,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [6, 6, 6] total 34 [2021-11-23 01:54:29,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939814364] [2021-11-23 01:54:29,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:54:29,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 01:54:29,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:29,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 01:54:29,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 01:54:29,084 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand has 22 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 01:54:29,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:29,886 INFO L93 Difference]: Finished difference Result 230 states and 254 transitions. [2021-11-23 01:54:29,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 01:54:29,887 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2021-11-23 01:54:29,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:29,888 INFO L225 Difference]: With dead ends: 230 [2021-11-23 01:54:29,889 INFO L226 Difference]: Without dead ends: 228 [2021-11-23 01:54:29,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=306, Invalid=1416, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 01:54:29,891 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 277 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:29,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 433 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 01:54:29,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-23 01:54:29,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 120. [2021-11-23 01:54:29,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 97 states have (on average 1.2577319587628866) internal successors, (122), 108 states have internal predecessors, (122), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-23 01:54:29,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 139 transitions. [2021-11-23 01:54:29,905 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 139 transitions. Word has length 49 [2021-11-23 01:54:29,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:29,906 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 139 transitions. [2021-11-23 01:54:29,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 01:54:29,906 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 139 transitions. [2021-11-23 01:54:29,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 01:54:29,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:29,907 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:29,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 01:54:30,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 01:54:30,125 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-23 01:54:30,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:30,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1165133808, now seen corresponding path program 1 times [2021-11-23 01:54:30,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:30,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592914354] [2021-11-23 01:54:30,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:30,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 01:54:30,207 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:30,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592914354] [2021-11-23 01:54:30,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592914354] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:54:30,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519409699] [2021-11-23 01:54:30,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:30,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:30,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:54:30,209 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:54:30,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 01:54:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:30,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 01:54:30,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:54:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 01:54:30,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:54:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 01:54:30,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519409699] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:54:30,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [615756333] [2021-11-23 01:54:30,650 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-23 01:54:30,651 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:54:30,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:54:30,652 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:54:30,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:54:31,007 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2021-11-23 01:54:31,160 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:54:32,098 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6166#(and (<= |ULTIMATE.start_main_~eb~2#1| 127) (= (select |#length| 3) 12) (<= 0 (+ |ULTIMATE.start_main_~ea~2#1| 128)) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (< (+ (ite (<= (mod (div |ULTIMATE.start_mulflt_~a#1| 16777216) 4294967296) 2147483647) (mod (div |ULTIMATE.start_mulflt_~a#1| 16777216) 4294967296) (+ (- 4294967296) (mod (div |ULTIMATE.start_mulflt_~a#1| 16777216) 4294967296))) 2147483520) 0) (= (select |#valid| 1) 1) (or (and (= |ULTIMATE.start_mulflt_#in~b#1| |ULTIMATE.start_mulflt_~b#1|) (<= (mod |ULTIMATE.start_mulflt_#in~b#1| 4294967296) (mod |ULTIMATE.start_mulflt_#in~a#1| 4294967296)) (= |ULTIMATE.start_mulflt_#in~a#1| |ULTIMATE.start_mulflt_~a#1|)) (and (= |ULTIMATE.start_mulflt_#in~b#1| |ULTIMATE.start_mulflt_~a#1|) (= |ULTIMATE.start_mulflt_~tmp~1#1| |ULTIMATE.start_mulflt_~b#1|) (< (mod |ULTIMATE.start_mulflt_#in~a#1| 4294967296) (mod |ULTIMATE.start_mulflt_#in~b#1| 4294967296)) (= |ULTIMATE.start_mulflt_~tmp~1#1| |ULTIMATE.start_mulflt_#in~a#1|))) (= |ULTIMATE.start_mulflt_#in~a#1| |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_mulflt_#in~b#1| |ULTIMATE.start_main_~b~0#1|) (= (select |#valid| 0) 0) (<= 0 (+ |ULTIMATE.start_main_~eb~2#1| 128)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (not (= (mod |ULTIMATE.start_mulflt_~b#1| 4294967296) 0)) (<= |ULTIMATE.start_main_~ea~2#1| 127) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:54:32,098 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:54:32,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:54:32,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2021-11-23 01:54:32,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746052097] [2021-11-23 01:54:32,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:54:32,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 01:54:32,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:32,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 01:54:32,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-11-23 01:54:32,101 INFO L87 Difference]: Start difference. First operand 120 states and 139 transitions. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 01:54:32,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:32,666 INFO L93 Difference]: Finished difference Result 312 states and 364 transitions. [2021-11-23 01:54:32,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 01:54:32,667 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2021-11-23 01:54:32,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:32,669 INFO L225 Difference]: With dead ends: 312 [2021-11-23 01:54:32,669 INFO L226 Difference]: Without dead ends: 222 [2021-11-23 01:54:32,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 01:54:32,672 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 154 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:32,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 266 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 01:54:32,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-23 01:54:32,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 138. [2021-11-23 01:54:32,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 115 states have (on average 1.2434782608695651) internal successors, (143), 126 states have internal predecessors, (143), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-23 01:54:32,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 160 transitions. [2021-11-23 01:54:32,690 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 160 transitions. Word has length 50 [2021-11-23 01:54:32,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:32,691 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 160 transitions. [2021-11-23 01:54:32,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 01:54:32,692 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 160 transitions. [2021-11-23 01:54:32,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 01:54:32,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:32,693 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:32,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 01:54:32,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 01:54:32,921 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-23 01:54:32,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:32,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1280577363, now seen corresponding path program 1 times [2021-11-23 01:54:32,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:32,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272404832] [2021-11-23 01:54:32,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:32,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:33,002 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 01:54:33,002 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:33,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272404832] [2021-11-23 01:54:33,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272404832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:54:33,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617259907] [2021-11-23 01:54:33,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:33,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:33,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:54:33,004 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:54:33,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 01:54:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:33,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 01:54:33,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:54:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 01:54:33,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:54:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 01:54:33,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617259907] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:54:33,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2122201119] [2021-11-23 01:54:33,432 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-23 01:54:33,433 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:54:33,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:54:33,434 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:54:33,434 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:54:33,795 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2021-11-23 01:54:33,971 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:54:35,125 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7067#(and (<= |ULTIMATE.start_main_~eb~2#1| 127) (= (select |#length| 3) 12) (<= 0 (+ |ULTIMATE.start_main_~ea~2#1| 128)) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (< (+ (ite (<= (mod (div |ULTIMATE.start_mulflt_~a#1| 16777216) 4294967296) 2147483647) (mod (div |ULTIMATE.start_mulflt_~a#1| 16777216) 4294967296) (+ (- 4294967296) (mod (div |ULTIMATE.start_mulflt_~a#1| 16777216) 4294967296))) 2147483520) 0) (= (select |#valid| 1) 1) (or (and (= |ULTIMATE.start_mulflt_#in~b#1| |ULTIMATE.start_mulflt_~b#1|) (<= (mod |ULTIMATE.start_mulflt_#in~b#1| 4294967296) (mod |ULTIMATE.start_mulflt_#in~a#1| 4294967296)) (= |ULTIMATE.start_mulflt_#in~a#1| |ULTIMATE.start_mulflt_~a#1|)) (and (= |ULTIMATE.start_mulflt_#in~b#1| |ULTIMATE.start_mulflt_~a#1|) (= |ULTIMATE.start_mulflt_~tmp~1#1| |ULTIMATE.start_mulflt_~b#1|) (< (mod |ULTIMATE.start_mulflt_#in~a#1| 4294967296) (mod |ULTIMATE.start_mulflt_#in~b#1| 4294967296)) (= |ULTIMATE.start_mulflt_~tmp~1#1| |ULTIMATE.start_mulflt_#in~a#1|))) (= |ULTIMATE.start_mulflt_#in~a#1| |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_mulflt_#in~b#1| |ULTIMATE.start_main_~b~0#1|) (= (select |#valid| 0) 0) (<= 0 (+ |ULTIMATE.start_main_~eb~2#1| 128)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (not (= (mod |ULTIMATE.start_mulflt_~b#1| 4294967296) 0)) (<= |ULTIMATE.start_main_~ea~2#1| 127) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:54:35,125 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:54:35,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:54:35,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2021-11-23 01:54:35,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328510087] [2021-11-23 01:54:35,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:54:35,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 01:54:35,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:35,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 01:54:35,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-11-23 01:54:35,129 INFO L87 Difference]: Start difference. First operand 138 states and 160 transitions. Second operand has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 14 states have internal predecessors, (79), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 01:54:35,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:35,379 INFO L93 Difference]: Finished difference Result 360 states and 421 transitions. [2021-11-23 01:54:35,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 01:54:35,380 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 14 states have internal predecessors, (79), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-11-23 01:54:35,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:35,382 INFO L225 Difference]: With dead ends: 360 [2021-11-23 01:54:35,382 INFO L226 Difference]: Without dead ends: 268 [2021-11-23 01:54:35,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=240, Invalid=816, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 01:54:35,384 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 187 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:35,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 262 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:54:35,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-23 01:54:35,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 140. [2021-11-23 01:54:35,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 117 states have (on average 1.2136752136752136) internal successors, (142), 128 states have internal predecessors, (142), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-23 01:54:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 159 transitions. [2021-11-23 01:54:35,408 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 159 transitions. Word has length 51 [2021-11-23 01:54:35,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:35,408 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 159 transitions. [2021-11-23 01:54:35,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 14 states have internal predecessors, (79), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 01:54:35,409 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 159 transitions. [2021-11-23 01:54:35,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 01:54:35,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:35,410 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:35,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 01:54:35,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 01:54:35,625 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-23 01:54:35,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:35,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1368167024, now seen corresponding path program 2 times [2021-11-23 01:54:35,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:35,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659691834] [2021-11-23 01:54:35,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:35,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 3 proven. 83 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 01:54:35,830 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:35,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659691834] [2021-11-23 01:54:35,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659691834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:54:35,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229299271] [2021-11-23 01:54:35,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 01:54:35,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:35,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:54:35,832 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:54:35,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 01:54:35,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-23 01:54:35,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 01:54:35,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 01:54:35,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:54:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-23 01:54:36,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:54:36,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229299271] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:54:36,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:54:36,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2021-11-23 01:54:36,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649010915] [2021-11-23 01:54:36,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:54:36,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 01:54:36,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:54:36,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 01:54:36,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-23 01:54:36,255 INFO L87 Difference]: Start difference. First operand 140 states and 159 transitions. Second operand has 7 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-23 01:54:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:54:36,376 INFO L93 Difference]: Finished difference Result 174 states and 195 transitions. [2021-11-23 01:54:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:54:36,377 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 70 [2021-11-23 01:54:36,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:54:36,379 INFO L225 Difference]: With dead ends: 174 [2021-11-23 01:54:36,379 INFO L226 Difference]: Without dead ends: 173 [2021-11-23 01:54:36,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-23 01:54:36,380 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 29 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:54:36,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 333 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:54:36,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-23 01:54:36,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 146. [2021-11-23 01:54:36,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 122 states have (on average 1.2049180327868851) internal successors, (147), 133 states have internal predecessors, (147), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (13), 8 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-23 01:54:36,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 166 transitions. [2021-11-23 01:54:36,413 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 166 transitions. Word has length 70 [2021-11-23 01:54:36,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:54:36,413 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 166 transitions. [2021-11-23 01:54:36,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-23 01:54:36,414 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 166 transitions. [2021-11-23 01:54:36,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 01:54:36,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:54:36,415 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:54:36,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-23 01:54:36,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 01:54:36,624 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [base2fltErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, base2fltErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-11-23 01:54:36,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:54:36,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1015327533, now seen corresponding path program 2 times [2021-11-23 01:54:36,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:54:36,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191923129] [2021-11-23 01:54:36,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:54:36,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:54:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:54:36,822 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 3 proven. 95 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 01:54:36,822 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:54:36,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191923129] [2021-11-23 01:54:36,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191923129] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:54:36,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419259094] [2021-11-23 01:54:36,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 01:54:36,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:54:36,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:54:36,825 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:54:36,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43cdb47-6cae-4f2c-9d09-e22a868421ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 01:54:36,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 01:54:36,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 01:54:36,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 01:54:36,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:54:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-23 01:54:37,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:55:13,865 WARN L227 SmtUtils]: Spent 29.31s on a formula simplification. DAG size of input: 4062 DAG size of output: 3491 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)