./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/psyco/psyco_abp_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/psyco/psyco_abp_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl --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 167b835a28653099821c6834c1cc6b8e30303efac27d569b21e43e89592d7586 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:47:13,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:47:13,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:47:13,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:47:13,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:47:13,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:47:13,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:47:13,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:47:13,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:47:13,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:47:13,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:47:14,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:47:14,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:47:14,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:47:14,015 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:47:14,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:47:14,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:47:14,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:47:14,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:47:14,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:47:14,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:47:14,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:47:14,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:47:14,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:47:14,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:47:14,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:47:14,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:47:14,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:47:14,069 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:47:14,071 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:47:14,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:47:14,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:47:14,076 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:47:14,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:47:14,081 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:47:14,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:47:14,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:47:14,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:47:14,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:47:14,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:47:14,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:47:14,087 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/config/svcomp-Overflow-32bit-Taipan_Default.epf [2021-11-23 16:47:14,166 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:47:14,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:47:14,169 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:47:14,169 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:47:14,176 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:47:14,176 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:47:14,176 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:47:14,177 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:47:14,177 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:47:14,177 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:47:14,177 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:47:14,177 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:47:14,178 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:47:14,178 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:47:14,178 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:47:14,178 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:47:14,179 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:47:14,179 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:47:14,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:47:14,180 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:47:14,180 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 16:47:14,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:47:14,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:47:14,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:47:14,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:47:14,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:47:14,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:47:14,182 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-23 16:47:14,182 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:47:14,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:47:14,182 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:47:14,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:47:14,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:47:14,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:47:14,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:47:14,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:47:14,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:47:14,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:47:14,199 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:47:14,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:47:14,200 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:47:14,200 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:47:14,201 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:47:14,201 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_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 167b835a28653099821c6834c1cc6b8e30303efac27d569b21e43e89592d7586 [2021-11-23 16:47:14,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:47:14,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:47:14,541 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:47:14,542 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:47:14,543 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:47:14,545 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/psyco/psyco_abp_1-2.c [2021-11-23 16:47:14,620 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/data/63730cc4c/080c21a62941499295c5490e0eb940d5/FLAG3cb3e5c68 [2021-11-23 16:47:15,321 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:47:15,322 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/sv-benchmarks/c/psyco/psyco_abp_1-2.c [2021-11-23 16:47:15,336 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/data/63730cc4c/080c21a62941499295c5490e0eb940d5/FLAG3cb3e5c68 [2021-11-23 16:47:15,543 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/data/63730cc4c/080c21a62941499295c5490e0eb940d5 [2021-11-23 16:47:15,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:47:15,547 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:47:15,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:47:15,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:47:15,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:47:15,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:47:15" (1/1) ... [2021-11-23 16:47:15,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18eb61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:15, skipping insertion in model container [2021-11-23 16:47:15,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:47:15" (1/1) ... [2021-11-23 16:47:15,566 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:47:15,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:47:15,944 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_56a8900a-efcc-46a2-ab72-ff62abd483fc/sv-benchmarks/c/psyco/psyco_abp_1-2.c[24706,24719] [2021-11-23 16:47:15,951 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:47:15,963 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:47:16,052 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_56a8900a-efcc-46a2-ab72-ff62abd483fc/sv-benchmarks/c/psyco/psyco_abp_1-2.c[24706,24719] [2021-11-23 16:47:16,055 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:47:16,089 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:47:16,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:16 WrapperNode [2021-11-23 16:47:16,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:47:16,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:47:16,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:47:16,092 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:47:16,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:16" (1/1) ... [2021-11-23 16:47:16,140 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:16" (1/1) ... [2021-11-23 16:47:16,226 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 467 [2021-11-23 16:47:16,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:47:16,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:47:16,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:47:16,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:47:16,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:16" (1/1) ... [2021-11-23 16:47:16,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:16" (1/1) ... [2021-11-23 16:47:16,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:16" (1/1) ... [2021-11-23 16:47:16,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:16" (1/1) ... [2021-11-23 16:47:16,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:16" (1/1) ... [2021-11-23 16:47:16,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:16" (1/1) ... [2021-11-23 16:47:16,300 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:16" (1/1) ... [2021-11-23 16:47:16,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:47:16,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:47:16,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:47:16,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:47:16,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:16" (1/1) ... [2021-11-23 16:47:16,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:47:16,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:47:16,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:47:16,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:47:16,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:47:16,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:47:16,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:47:16,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:47:16,619 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:47:16,621 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:47:17,551 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:47:17,588 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:47:17,593 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 16:47:17,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:47:17 BoogieIcfgContainer [2021-11-23 16:47:17,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:47:17,600 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:47:17,600 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:47:17,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:47:17,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:47:15" (1/3) ... [2021-11-23 16:47:17,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162fe6f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:47:17, skipping insertion in model container [2021-11-23 16:47:17,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:47:16" (2/3) ... [2021-11-23 16:47:17,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162fe6f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:47:17, skipping insertion in model container [2021-11-23 16:47:17,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:47:17" (3/3) ... [2021-11-23 16:47:17,611 INFO L111 eAbstractionObserver]: Analyzing ICFG psyco_abp_1-2.c [2021-11-23 16:47:17,617 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:47:17,617 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2021-11-23 16:47:17,683 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:47:17,692 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 16:47:17,692 INFO L340 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2021-11-23 16:47:17,742 INFO L276 IsEmpty]: Start isEmpty. Operand has 192 states, 149 states have (on average 1.9731543624161074) internal successors, (294), 191 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:17,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 16:47:17,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:17,762 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:17,763 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:47:17,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:17,793 INFO L85 PathProgramCache]: Analyzing trace with hash 989774804, now seen corresponding path program 1 times [2021-11-23 16:47:17,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:47:17,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109799827] [2021-11-23 16:47:17,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:17,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:47:17,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:18,105 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 16:47:18,106 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:47:18,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109799827] [2021-11-23 16:47:18,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109799827] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:18,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:18,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:47:18,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811302631] [2021-11-23 16:47:18,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:18,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:47:18,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:47:18,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:47:18,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:47:18,168 INFO L87 Difference]: Start difference. First operand has 192 states, 149 states have (on average 1.9731543624161074) internal successors, (294), 191 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:18,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:18,414 INFO L93 Difference]: Finished difference Result 386 states and 593 transitions. [2021-11-23 16:47:18,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:47:18,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 16:47:18,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:18,437 INFO L225 Difference]: With dead ends: 386 [2021-11-23 16:47:18,437 INFO L226 Difference]: Without dead ends: 165 [2021-11-23 16:47:18,445 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 16:47:18,452 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 4 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:18,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 527 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:47:18,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-23 16:47:18,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-11-23 16:47:18,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 123 states have (on average 1.6910569105691058) internal successors, (208), 164 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:18,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 208 transitions. [2021-11-23 16:47:18,522 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 208 transitions. Word has length 9 [2021-11-23 16:47:18,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:18,522 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 208 transitions. [2021-11-23 16:47:18,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:18,523 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 208 transitions. [2021-11-23 16:47:18,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 16:47:18,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:18,525 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:18,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 16:47:18,525 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:47:18,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:18,527 INFO L85 PathProgramCache]: Analyzing trace with hash 995209245, now seen corresponding path program 1 times [2021-11-23 16:47:18,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:47:18,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577220064] [2021-11-23 16:47:18,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:18,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:47:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:18,643 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 16:47:18,643 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:47:18,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577220064] [2021-11-23 16:47:18,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577220064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:18,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:18,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:47:18,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216188939] [2021-11-23 16:47:18,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:18,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:47:18,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:47:18,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:47:18,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:47:18,648 INFO L87 Difference]: Start difference. First operand 165 states and 208 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:18,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:18,829 INFO L93 Difference]: Finished difference Result 320 states and 406 transitions. [2021-11-23 16:47:18,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:47:18,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 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 16:47:18,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:18,834 INFO L225 Difference]: With dead ends: 320 [2021-11-23 16:47:18,834 INFO L226 Difference]: Without dead ends: 260 [2021-11-23 16:47:18,835 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 16:47:18,837 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 151 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:18,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 323 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:47:18,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-23 16:47:18,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 251. [2021-11-23 16:47:18,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 209 states have (on average 1.6267942583732058) internal successors, (340), 250 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:18,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 340 transitions. [2021-11-23 16:47:18,863 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 340 transitions. Word has length 14 [2021-11-23 16:47:18,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:18,863 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 340 transitions. [2021-11-23 16:47:18,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:18,864 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 340 transitions. [2021-11-23 16:47:18,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 16:47:18,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:18,865 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:18,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 16:47:18,887 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:47:18,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:18,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1381620001, now seen corresponding path program 1 times [2021-11-23 16:47:18,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:47:18,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606903280] [2021-11-23 16:47:18,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:18,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:47:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:18,963 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 16:47:18,964 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:47:18,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606903280] [2021-11-23 16:47:18,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606903280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:18,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:18,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:47:18,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409548947] [2021-11-23 16:47:18,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:18,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:47:18,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:47:18,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:47:18,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:47:18,968 INFO L87 Difference]: Start difference. First operand 251 states and 340 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:19,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:19,042 INFO L93 Difference]: Finished difference Result 354 states and 486 transitions. [2021-11-23 16:47:19,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:47:19,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 16:47:19,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:19,047 INFO L225 Difference]: With dead ends: 354 [2021-11-23 16:47:19,048 INFO L226 Difference]: Without dead ends: 346 [2021-11-23 16:47:19,050 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 16:47:19,061 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 123 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:19,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 378 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:47:19,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-11-23 16:47:19,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 341. [2021-11-23 16:47:19,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 299 states have (on average 1.5785953177257526) internal successors, (472), 340 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:19,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 472 transitions. [2021-11-23 16:47:19,113 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 472 transitions. Word has length 16 [2021-11-23 16:47:19,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:19,114 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 472 transitions. [2021-11-23 16:47:19,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:19,114 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 472 transitions. [2021-11-23 16:47:19,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 16:47:19,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:19,123 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:19,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 16:47:19,125 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:47:19,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:19,127 INFO L85 PathProgramCache]: Analyzing trace with hash -201360900, now seen corresponding path program 1 times [2021-11-23 16:47:19,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:47:19,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725228776] [2021-11-23 16:47:19,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:19,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:47:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:19,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:47:19,301 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:47:19,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725228776] [2021-11-23 16:47:19,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725228776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:19,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:19,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:47:19,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941334668] [2021-11-23 16:47:19,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:19,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:47:19,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:47:19,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:47:19,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:47:19,305 INFO L87 Difference]: Start difference. First operand 341 states and 472 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:19,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:19,368 INFO L93 Difference]: Finished difference Result 695 states and 969 transitions. [2021-11-23 16:47:19,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:47:19,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-23 16:47:19,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:19,372 INFO L225 Difference]: With dead ends: 695 [2021-11-23 16:47:19,372 INFO L226 Difference]: Without dead ends: 356 [2021-11-23 16:47:19,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:47:19,387 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 39 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:19,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 351 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:47:19,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-11-23 16:47:19,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2021-11-23 16:47:19,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 314 states have (on average 1.5509554140127388) internal successors, (487), 355 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:19,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 487 transitions. [2021-11-23 16:47:19,405 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 487 transitions. Word has length 24 [2021-11-23 16:47:19,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:19,405 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 487 transitions. [2021-11-23 16:47:19,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:19,406 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 487 transitions. [2021-11-23 16:47:19,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 16:47:19,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:19,408 INFO L514 BasicCegarLoop]: trace histogram [3, 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 16:47:19,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 16:47:19,408 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:47:19,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:19,409 INFO L85 PathProgramCache]: Analyzing trace with hash 2144880393, now seen corresponding path program 1 times [2021-11-23 16:47:19,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:47:19,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069960676] [2021-11-23 16:47:19,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:19,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:47:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:19,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:19,524 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:47:19,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069960676] [2021-11-23 16:47:19,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069960676] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 16:47:19,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198923920] [2021-11-23 16:47:19,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:19,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:19,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:47:19,528 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:47:19,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 16:47:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:19,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:47:19,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:19,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:19,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198923920] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:19,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2104347103] [2021-11-23 16:47:19,995 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-23 16:47:19,995 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 16:47:20,002 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 16:47:20,010 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 16:47:20,011 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 16:47:22,380 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 16:47:27,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2104347103] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:27,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 16:47:27,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [3, 3, 3] total 27 [2021-11-23 16:47:27,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948944071] [2021-11-23 16:47:27,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:27,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 16:47:27,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:47:27,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 16:47:27,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=539, Unknown=0, NotChecked=0, Total=756 [2021-11-23 16:47:27,407 INFO L87 Difference]: Start difference. First operand 356 states and 487 transitions. Second operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:30,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:30,255 INFO L93 Difference]: Finished difference Result 762 states and 1048 transitions. [2021-11-23 16:47:30,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 16:47:30,256 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-23 16:47:30,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:30,259 INFO L225 Difference]: With dead ends: 762 [2021-11-23 16:47:30,259 INFO L226 Difference]: Without dead ends: 404 [2021-11-23 16:47:30,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2021-11-23 16:47:30,261 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 117 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:30,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 719 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-23 16:47:30,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-11-23 16:47:30,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 401. [2021-11-23 16:47:30,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 359 states have (on average 1.5264623955431755) internal successors, (548), 400 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:30,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 548 transitions. [2021-11-23 16:47:30,283 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 548 transitions. Word has length 27 [2021-11-23 16:47:30,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:30,284 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 548 transitions. [2021-11-23 16:47:30,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:30,284 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 548 transitions. [2021-11-23 16:47:30,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 16:47:30,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:30,287 INFO L514 BasicCegarLoop]: trace histogram [3, 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 16:47:30,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:30,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:30,508 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:47:30,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:30,508 INFO L85 PathProgramCache]: Analyzing trace with hash 2066781395, now seen corresponding path program 1 times [2021-11-23 16:47:30,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:47:30,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306975034] [2021-11-23 16:47:30,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:30,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:47:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 16:47:30,564 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:47:30,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306975034] [2021-11-23 16:47:30,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306975034] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:30,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:30,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:47:30,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65321427] [2021-11-23 16:47:30,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:30,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:47:30,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:47:30,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:47:30,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:47:30,568 INFO L87 Difference]: Start difference. First operand 401 states and 548 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:30,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:30,587 INFO L93 Difference]: Finished difference Result 758 states and 1036 transitions. [2021-11-23 16:47:30,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:47:30,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-23 16:47:30,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:30,591 INFO L225 Difference]: With dead ends: 758 [2021-11-23 16:47:30,592 INFO L226 Difference]: Without dead ends: 401 [2021-11-23 16:47:30,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:47:30,597 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 0 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:30,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 403 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:47:30,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-23 16:47:30,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2021-11-23 16:47:30,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 359 states have (on average 1.5153203342618384) internal successors, (544), 400 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:30,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 544 transitions. [2021-11-23 16:47:30,617 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 544 transitions. Word has length 28 [2021-11-23 16:47:30,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:30,618 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 544 transitions. [2021-11-23 16:47:30,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:30,620 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 544 transitions. [2021-11-23 16:47:30,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 16:47:30,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:30,622 INFO L514 BasicCegarLoop]: trace histogram [3, 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 16:47:30,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 16:47:30,623 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:47:30,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:30,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1903641239, now seen corresponding path program 1 times [2021-11-23 16:47:30,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:47:30,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715981343] [2021-11-23 16:47:30,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:30,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:47:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:30,722 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:47:30,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715981343] [2021-11-23 16:47:30,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715981343] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 16:47:30,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167008292] [2021-11-23 16:47:30,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:30,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:30,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:47:30,731 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:47:30,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 16:47:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:30,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:47:30,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:30,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:30,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:31,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167008292] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:31,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1084673277] [2021-11-23 16:47:31,060 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-23 16:47:31,060 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 16:47:31,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 16:47:31,061 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 16:47:31,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 16:47:33,564 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 16:47:39,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1084673277] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:39,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 16:47:39,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [3, 3, 3] total 28 [2021-11-23 16:47:39,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861996238] [2021-11-23 16:47:39,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:39,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 16:47:39,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:47:39,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 16:47:39,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2021-11-23 16:47:39,637 INFO L87 Difference]: Start difference. First operand 401 states and 544 transitions. Second operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:42,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:42,698 INFO L93 Difference]: Finished difference Result 407 states and 550 transitions. [2021-11-23 16:47:42,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 16:47:42,699 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-23 16:47:42,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:42,703 INFO L225 Difference]: With dead ends: 407 [2021-11-23 16:47:42,703 INFO L226 Difference]: Without dead ends: 405 [2021-11-23 16:47:42,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=276, Invalid=780, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 16:47:42,705 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 76 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:42,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 810 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1287 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-23 16:47:42,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-23 16:47:42,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 404. [2021-11-23 16:47:42,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 362 states have (on average 1.511049723756906) internal successors, (547), 403 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:42,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 547 transitions. [2021-11-23 16:47:42,722 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 547 transitions. Word has length 30 [2021-11-23 16:47:42,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:42,723 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 547 transitions. [2021-11-23 16:47:42,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:42,724 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 547 transitions. [2021-11-23 16:47:42,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 16:47:42,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:42,725 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-11-23 16:47:42,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:42,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:42,949 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:47:42,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:42,950 INFO L85 PathProgramCache]: Analyzing trace with hash 575939136, now seen corresponding path program 1 times [2021-11-23 16:47:42,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:47:42,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958213119] [2021-11-23 16:47:42,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:42,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:47:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 16:47:43,005 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:47:43,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958213119] [2021-11-23 16:47:43,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958213119] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:43,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:43,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:47:43,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352683810] [2021-11-23 16:47:43,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:43,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:47:43,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:47:43,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:47:43,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:47:43,006 INFO L87 Difference]: Start difference. First operand 404 states and 547 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:43,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:43,069 INFO L93 Difference]: Finished difference Result 782 states and 1071 transitions. [2021-11-23 16:47:43,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:47:43,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-23 16:47:43,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:43,073 INFO L225 Difference]: With dead ends: 782 [2021-11-23 16:47:43,074 INFO L226 Difference]: Without dead ends: 428 [2021-11-23 16:47:43,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:47:43,076 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 82 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:43,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 310 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:47:43,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-11-23 16:47:43,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 428. [2021-11-23 16:47:43,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 386 states have (on average 1.494818652849741) internal successors, (577), 427 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:43,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 577 transitions. [2021-11-23 16:47:43,098 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 577 transitions. Word has length 38 [2021-11-23 16:47:43,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:43,099 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 577 transitions. [2021-11-23 16:47:43,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:43,099 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 577 transitions. [2021-11-23 16:47:43,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 16:47:43,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:43,105 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-11-23 16:47:43,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 16:47:43,105 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:47:43,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:43,106 INFO L85 PathProgramCache]: Analyzing trace with hash -677359335, now seen corresponding path program 1 times [2021-11-23 16:47:43,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:47:43,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501000199] [2021-11-23 16:47:43,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:43,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:47:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 16:47:43,173 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:47:43,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501000199] [2021-11-23 16:47:43,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501000199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:43,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:43,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:47:43,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069501298] [2021-11-23 16:47:43,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:43,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:47:43,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:47:43,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:47:43,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:47:43,176 INFO L87 Difference]: Start difference. First operand 428 states and 577 transitions. Second operand has 3 states, 2 states have (on average 19.0) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:43,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:43,314 INFO L93 Difference]: Finished difference Result 557 states and 763 transitions. [2021-11-23 16:47:43,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:47:43,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 19.0) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-23 16:47:43,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:43,322 INFO L225 Difference]: With dead ends: 557 [2021-11-23 16:47:43,322 INFO L226 Difference]: Without dead ends: 542 [2021-11-23 16:47:43,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:47:43,326 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 162 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:43,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 322 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:47:43,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-11-23 16:47:43,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 529. [2021-11-23 16:47:43,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 487 states have (on average 1.51129363449692) internal successors, (736), 528 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:43,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 736 transitions. [2021-11-23 16:47:43,348 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 736 transitions. Word has length 41 [2021-11-23 16:47:43,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:43,349 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 736 transitions. [2021-11-23 16:47:43,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 19.0) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:43,350 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 736 transitions. [2021-11-23 16:47:43,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 16:47:43,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:43,352 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:43,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 16:47:43,353 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:47:43,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:43,354 INFO L85 PathProgramCache]: Analyzing trace with hash 476697526, now seen corresponding path program 1 times [2021-11-23 16:47:43,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:47:43,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451129010] [2021-11-23 16:47:43,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:43,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:47:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 16:47:43,433 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:47:43,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451129010] [2021-11-23 16:47:43,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451129010] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:43,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:43,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:47:43,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475818084] [2021-11-23 16:47:43,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:43,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:47:43,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:47:43,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:47:43,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:47:43,437 INFO L87 Difference]: Start difference. First operand 529 states and 736 transitions. Second operand has 3 states, 2 states have (on average 19.5) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:43,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:43,509 INFO L93 Difference]: Finished difference Result 529 states and 736 transitions. [2021-11-23 16:47:43,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:47:43,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 19.5) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-23 16:47:43,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:43,514 INFO L225 Difference]: With dead ends: 529 [2021-11-23 16:47:43,514 INFO L226 Difference]: Without dead ends: 486 [2021-11-23 16:47:43,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:47:43,515 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 168 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:43,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 144 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:47:43,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-11-23 16:47:43,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 484. [2021-11-23 16:47:43,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 459 states have (on average 1.477124183006536) internal successors, (678), 483 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:43,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 678 transitions. [2021-11-23 16:47:43,536 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 678 transitions. Word has length 42 [2021-11-23 16:47:43,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:43,536 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 678 transitions. [2021-11-23 16:47:43,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 19.5) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:43,537 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 678 transitions. [2021-11-23 16:47:43,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-23 16:47:43,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:43,538 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:43,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 16:47:43,538 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:47:43,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:43,539 INFO L85 PathProgramCache]: Analyzing trace with hash -970345499, now seen corresponding path program 1 times [2021-11-23 16:47:43,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:47:43,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175113651] [2021-11-23 16:47:43,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:43,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:47:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 16:47:43,638 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:47:43,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175113651] [2021-11-23 16:47:43,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175113651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 16:47:43,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232880054] [2021-11-23 16:47:43,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:43,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:43,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:47:43,647 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:47:43,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 16:47:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:43,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:47:43,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 16:47:43,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 16:47:44,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232880054] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:44,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [340706158] [2021-11-23 16:47:44,011 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-23 16:47:44,012 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 16:47:44,013 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 16:47:44,013 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 16:47:44,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 16:47:46,689 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 16:47:53,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [340706158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:53,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 16:47:53,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [3, 3, 3] total 34 [2021-11-23 16:47:53,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921410115] [2021-11-23 16:47:53,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:53,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 16:47:53,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:47:53,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 16:47:53,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 16:47:53,775 INFO L87 Difference]: Start difference. First operand 484 states and 678 transitions. Second operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:58,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:58,004 INFO L93 Difference]: Finished difference Result 940 states and 1322 transitions. [2021-11-23 16:47:58,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 16:47:58,005 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-23 16:47:58,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:58,010 INFO L225 Difference]: With dead ends: 940 [2021-11-23 16:47:58,012 INFO L226 Difference]: Without dead ends: 506 [2021-11-23 16:47:58,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=316, Invalid=1166, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 16:47:58,020 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 90 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 2363 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 2411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:58,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 1153 Invalid, 2411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2363 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-23 16:47:58,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-11-23 16:47:58,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 502. [2021-11-23 16:47:58,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 477 states have (on average 1.4737945492662474) internal successors, (703), 501 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:58,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 703 transitions. [2021-11-23 16:47:58,042 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 703 transitions. Word has length 44 [2021-11-23 16:47:58,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:58,044 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 703 transitions. [2021-11-23 16:47:58,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:58,045 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 703 transitions. [2021-11-23 16:47:58,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 16:47:58,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:58,047 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:58,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:58,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 16:47:58,264 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:47:58,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:58,265 INFO L85 PathProgramCache]: Analyzing trace with hash -494106265, now seen corresponding path program 1 times [2021-11-23 16:47:58,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:47:58,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765419682] [2021-11-23 16:47:58,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:58,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:47:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:58,363 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:47:58,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765419682] [2021-11-23 16:47:58,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765419682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 16:47:58,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621347142] [2021-11-23 16:47:58,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:58,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:58,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:47:58,366 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:47:58,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 16:47:58,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:58,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:47:58,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:58,619 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 16:47:58,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 16:47:58,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621347142] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:58,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1248505585] [2021-11-23 16:47:58,778 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2021-11-23 16:47:58,778 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 16:47:58,779 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 16:47:58,779 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 16:47:58,779 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 16:48:01,449 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 16:48:09,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1248505585] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:09,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 16:48:09,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [4, 3, 3] total 35 [2021-11-23 16:48:09,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993998628] [2021-11-23 16:48:09,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:09,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 16:48:09,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:48:09,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 16:48:09,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=995, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 16:48:09,235 INFO L87 Difference]: Start difference. First operand 502 states and 703 transitions. Second operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:12,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:12,868 INFO L93 Difference]: Finished difference Result 510 states and 711 transitions. [2021-11-23 16:48:12,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 16:48:12,869 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-23 16:48:12,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:12,872 INFO L225 Difference]: With dead ends: 510 [2021-11-23 16:48:12,872 INFO L226 Difference]: Without dead ends: 508 [2021-11-23 16:48:12,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=309, Invalid=1251, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 16:48:12,874 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 125 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 2325 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 2383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:12,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 1114 Invalid, 2383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2325 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 16:48:12,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-23 16:48:12,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 502. [2021-11-23 16:48:12,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 477 states have (on average 1.4737945492662474) internal successors, (703), 501 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:12,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 703 transitions. [2021-11-23 16:48:12,893 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 703 transitions. Word has length 46 [2021-11-23 16:48:12,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:12,894 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 703 transitions. [2021-11-23 16:48:12,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:12,894 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 703 transitions. [2021-11-23 16:48:12,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-23 16:48:12,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:12,895 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:12,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:13,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 16:48:13,112 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:48:13,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:13,112 INFO L85 PathProgramCache]: Analyzing trace with hash 359111259, now seen corresponding path program 1 times [2021-11-23 16:48:13,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:48:13,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933259116] [2021-11-23 16:48:13,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:13,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:48:13,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 16:48:13,172 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:48:13,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933259116] [2021-11-23 16:48:13,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933259116] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:13,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:13,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:13,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776755760] [2021-11-23 16:48:13,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:13,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:13,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:48:13,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:13,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:13,174 INFO L87 Difference]: Start difference. First operand 502 states and 703 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:13,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:13,210 INFO L93 Difference]: Finished difference Result 968 states and 1356 transitions. [2021-11-23 16:48:13,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:13,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-23 16:48:13,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:13,215 INFO L225 Difference]: With dead ends: 968 [2021-11-23 16:48:13,215 INFO L226 Difference]: Without dead ends: 534 [2021-11-23 16:48:13,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:13,217 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 35 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:13,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 293 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:13,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-23 16:48:13,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 534. [2021-11-23 16:48:13,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 509 states have (on average 1.4518664047151277) internal successors, (739), 533 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:13,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 739 transitions. [2021-11-23 16:48:13,238 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 739 transitions. Word has length 57 [2021-11-23 16:48:13,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:13,239 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 739 transitions. [2021-11-23 16:48:13,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:13,239 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 739 transitions. [2021-11-23 16:48:13,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 16:48:13,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:13,241 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:13,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 16:48:13,241 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:48:13,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:13,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1579395880, now seen corresponding path program 1 times [2021-11-23 16:48:13,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:48:13,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996213389] [2021-11-23 16:48:13,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:13,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:48:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 16:48:13,316 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:48:13,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996213389] [2021-11-23 16:48:13,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996213389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:13,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:13,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:13,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987777857] [2021-11-23 16:48:13,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:13,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:48:13,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:48:13,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:48:13,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:48:13,319 INFO L87 Difference]: Start difference. First operand 534 states and 739 transitions. Second operand has 4 states, 3 states have (on average 17.0) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:13,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:13,384 INFO L93 Difference]: Finished difference Result 545 states and 747 transitions. [2021-11-23 16:48:13,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:48:13,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 17.0) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-23 16:48:13,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:13,388 INFO L225 Difference]: With dead ends: 545 [2021-11-23 16:48:13,389 INFO L226 Difference]: Without dead ends: 517 [2021-11-23 16:48:13,389 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 16:48:13,390 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 297 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:13,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 382 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:13,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-11-23 16:48:13,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 410. [2021-11-23 16:48:13,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 400 states have (on average 1.4225) internal successors, (569), 409 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:13,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 569 transitions. [2021-11-23 16:48:13,409 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 569 transitions. Word has length 58 [2021-11-23 16:48:13,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:13,409 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 569 transitions. [2021-11-23 16:48:13,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 17.0) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:13,410 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 569 transitions. [2021-11-23 16:48:13,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 16:48:13,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:13,411 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:13,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 16:48:13,412 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:48:13,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:13,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1244844813, now seen corresponding path program 1 times [2021-11-23 16:48:13,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:48:13,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830168984] [2021-11-23 16:48:13,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:13,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:48:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 16:48:13,466 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:48:13,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830168984] [2021-11-23 16:48:13,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830168984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:13,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:13,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:13,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260212657] [2021-11-23 16:48:13,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:13,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:13,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:48:13,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:13,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:13,470 INFO L87 Difference]: Start difference. First operand 410 states and 569 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:13,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:13,487 INFO L93 Difference]: Finished difference Result 755 states and 1051 transitions. [2021-11-23 16:48:13,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:13,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-23 16:48:13,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:13,491 INFO L225 Difference]: With dead ends: 755 [2021-11-23 16:48:13,491 INFO L226 Difference]: Without dead ends: 410 [2021-11-23 16:48:13,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:13,493 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 0 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:13,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 285 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:13,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-23 16:48:13,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2021-11-23 16:48:13,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 400 states have (on average 1.415) internal successors, (566), 409 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:13,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 566 transitions. [2021-11-23 16:48:13,511 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 566 transitions. Word has length 64 [2021-11-23 16:48:13,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:13,511 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 566 transitions. [2021-11-23 16:48:13,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:13,512 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 566 transitions. [2021-11-23 16:48:13,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 16:48:13,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:13,513 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:13,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 16:48:13,514 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:48:13,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:13,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1998389231, now seen corresponding path program 1 times [2021-11-23 16:48:13,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:48:13,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220285953] [2021-11-23 16:48:13,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:13,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:48:13,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 16:48:13,597 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:48:13,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220285953] [2021-11-23 16:48:13,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220285953] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 16:48:13,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682416721] [2021-11-23 16:48:13,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:13,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:48:13,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:48:13,600 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:48:13,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 16:48:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:13,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:48:13,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:48:13,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:48:14,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682416721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:48:14,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [246107865] [2021-11-23 16:48:14,041 INFO L159 IcfgInterpreter]: Started Sifa with 51 locations of interest [2021-11-23 16:48:14,041 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 16:48:14,042 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 16:48:14,042 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 16:48:14,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 16:48:17,755 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 16:48:26,876 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17712#(and (<= 0 (+ |ULTIMATE.start_main_~P6~0#1| 2147483648)) (<= |ULTIMATE.start_main_~this_expect~0#1| 2147483648) (<= 0 (+ |ULTIMATE.start_main_~P5~0#1| 2147483648)) (= 6 ~m_recv_ack_1_1~0) (= 2 ~m_msg_2~0) (= ~m_msg_1_1~0 4) (= 7 ~m_recv_ack_1_2~0) (or (= |ULTIMATE.start_main_~P9~0#1| (ite (and (< |ULTIMATE.start_main_~this_expect~0#1| 1) (not (= 0 (mod (+ |ULTIMATE.start_main_~this_expect~0#1| 1) 2)))) (+ (- 2) (mod (+ |ULTIMATE.start_main_~this_expect~0#1| 1) 2)) (mod (+ |ULTIMATE.start_main_~this_expect~0#1| 1) 2))) (not (= |ULTIMATE.start_main_~P9~0#1| 1))) (<= |ULTIMATE.start_main_~P3~0#1| 2147483647) (= ~m_msg_1_2~0 5) (<= |ULTIMATE.start_main_~P2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P9~0#1| 2147483648)) (<= 1 |ULTIMATE.start_main_~this_expect~0#1|) (= ~m_Protocol~0 1) (= 7 |ULTIMATE.start_main_~method_id~0#1|) (< (+ |ULTIMATE.start_main_~this_buffer_empty~0#1| 2147483646) 0) (<= |ULTIMATE.start_main_~P9~0#1| 2147483647) (= |ULTIMATE.start_main_~q~0#1| 1) (<= 0 (+ |ULTIMATE.start_main_~P2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P4~0#1| 2147483647) (<= |ULTIMATE.start_main_~P5~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P7~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P3~0#1| 2147483648)) (= |ULTIMATE.start_main_~P1~0#1| 1) (= 3 ~m_recv_ack_2~0) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~P4~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P7~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_main_~P8~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P6~0#1| 2147483647) (<= |ULTIMATE.start_main_~P8~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2021-11-23 16:48:26,877 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 16:48:26,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 16:48:26,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2021-11-23 16:48:26,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783586915] [2021-11-23 16:48:26,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 16:48:26,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 16:48:26,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:48:26,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 16:48:26,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=2869, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 16:48:26,880 INFO L87 Difference]: Start difference. First operand 410 states and 566 transitions. Second operand has 7 states, 6 states have (on average 20.833333333333332) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:26,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:26,974 INFO L93 Difference]: Finished difference Result 420 states and 577 transitions. [2021-11-23 16:48:26,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:48:26,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 20.833333333333332) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-23 16:48:26,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:26,978 INFO L225 Difference]: With dead ends: 420 [2021-11-23 16:48:26,978 INFO L226 Difference]: Without dead ends: 412 [2021-11-23 16:48:26,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=338, Invalid=2968, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 16:48:26,981 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 611 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:26,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 340 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:48:26,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-23 16:48:26,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 291. [2021-11-23 16:48:26,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 289 states have (on average 1.3840830449826989) internal successors, (400), 290 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:27,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 400 transitions. [2021-11-23 16:48:27,000 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 400 transitions. Word has length 66 [2021-11-23 16:48:27,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:27,001 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 400 transitions. [2021-11-23 16:48:27,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 20.833333333333332) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:27,002 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 400 transitions. [2021-11-23 16:48:27,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 16:48:27,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:27,003 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 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, 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 16:48:27,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:27,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:48:27,219 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:48:27,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:27,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1492301004, now seen corresponding path program 1 times [2021-11-23 16:48:27,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:48:27,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760629439] [2021-11-23 16:48:27,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:27,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:48:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:48:27,311 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:48:27,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760629439] [2021-11-23 16:48:27,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760629439] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 16:48:27,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265525980] [2021-11-23 16:48:27,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:27,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:48:27,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:48:27,315 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:48:27,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 16:48:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:27,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:48:27,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:48:27,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:48:27,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265525980] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:48:27,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [276926515] [2021-11-23 16:48:27,722 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2021-11-23 16:48:27,723 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 16:48:27,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 16:48:27,724 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 16:48:27,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 16:48:37,193 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 16:48:51,284 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18971#(and (<= 0 (+ |ULTIMATE.start_main_~P6~0#1| 2147483648)) (<= |ULTIMATE.start_main_~this_expect~0#1| 2147483648) (<= 0 (+ |ULTIMATE.start_main_~P5~0#1| 2147483648)) (= 6 ~m_recv_ack_1_1~0) (<= 7 ~m_recv_ack_1_2~0) (<= |ULTIMATE.start_main_~P3~0#1| 2147483647) (<= |ULTIMATE.start_main_~P2~0#1| 2147483647) (<= ~m_msg_2~0 2) (<= 0 (+ |ULTIMATE.start_main_~P9~0#1| 2147483648)) (<= 4 ~m_msg_1_1~0) (<= 5 ~m_msg_1_2~0) (<= 0 (+ |ULTIMATE.start_main_~P1~0#1| 2147483648)) (<= 3 |ULTIMATE.start_main_~q~0#1|) (<= ~m_msg_1_2~0 5) (<= |ULTIMATE.start_main_~P9~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P4~0#1| 2147483647) (<= |ULTIMATE.start_main_~P5~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P7~0#1| 2147483648)) (<= ~m_Protocol~0 1) (<= 0 (+ |ULTIMATE.start_main_~P3~0#1| 2147483648)) (<= 2 ~m_msg_2~0) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~P4~0#1| 2147483648)) (= 2 |ULTIMATE.start_main_~method_id~0#1|) (< 2147483646 |ULTIMATE.start_main_~this_expect~0#1|) (<= ~m_recv_ack_1_2~0 7) (<= 3 ~m_recv_ack_2~0) (<= 1 ~m_Protocol~0) (<= |ULTIMATE.start_main_~P7~0#1| 2147483647) (<= |ULTIMATE.start_main_~q~0#1| 3) (<= 0 |#StackHeapBarrier|) (<= ~m_recv_ack_2~0 3) (<= 0 (+ |ULTIMATE.start_main_~P8~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P1~0#1| 2147483647) (= |ULTIMATE.start_main_~this_buffer_empty~0#1| 1) (<= |ULTIMATE.start_main_~P6~0#1| 2147483647) (<= |ULTIMATE.start_main_~P8~0#1| 2147483647) (= |#NULL.base| 0) (<= ~m_msg_1_1~0 4))' at error location [2021-11-23 16:48:51,284 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 16:48:51,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 16:48:51,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-23 16:48:51,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745646531] [2021-11-23 16:48:51,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 16:48:51,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:48:51,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:48:51,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:48:51,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=3207, Unknown=0, NotChecked=0, Total=3540 [2021-11-23 16:48:51,288 INFO L87 Difference]: Start difference. First operand 291 states and 400 transitions. Second operand has 9 states, 8 states have (on average 17.375) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:51,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:51,466 INFO L93 Difference]: Finished difference Result 880 states and 1218 transitions. [2021-11-23 16:48:51,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:48:51,467 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 17.375) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-23 16:48:51,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:51,473 INFO L225 Difference]: With dead ends: 880 [2021-11-23 16:48:51,473 INFO L226 Difference]: Without dead ends: 878 [2021-11-23 16:48:51,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1636 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=333, Invalid=3207, Unknown=0, NotChecked=0, Total=3540 [2021-11-23 16:48:51,476 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 974 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:51,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [974 Valid, 1205 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:48:51,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-11-23 16:48:51,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 846. [2021-11-23 16:48:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 844 states have (on average 1.386255924170616) internal successors, (1170), 845 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:51,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1170 transitions. [2021-11-23 16:48:51,503 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1170 transitions. Word has length 74 [2021-11-23 16:48:51,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:51,504 INFO L470 AbstractCegarLoop]: Abstraction has 846 states and 1170 transitions. [2021-11-23 16:48:51,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 17.375) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:51,504 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1170 transitions. [2021-11-23 16:48:51,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-23 16:48:51,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:51,508 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 9, 9, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:51,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:51,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 16:48:51,736 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:48:51,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:51,736 INFO L85 PathProgramCache]: Analyzing trace with hash 302032042, now seen corresponding path program 2 times [2021-11-23 16:48:51,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:48:51,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448329114] [2021-11-23 16:48:51,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:51,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:48:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 26 proven. 429 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 16:48:51,991 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:48:51,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448329114] [2021-11-23 16:48:51,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448329114] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 16:48:51,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509798331] [2021-11-23 16:48:51,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:48:51,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:48:51,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:48:51,993 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:48:52,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 16:48:52,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 16:48:52,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:48:52,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:48:52,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-11-23 16:48:52,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:52,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509798331] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:52,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 16:48:52,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2021-11-23 16:48:52,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949757998] [2021-11-23 16:48:52,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:52,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:48:52,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:48:52,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:48:52,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-11-23 16:48:52,445 INFO L87 Difference]: Start difference. First operand 846 states and 1170 transitions. Second operand has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:52,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:52,617 INFO L93 Difference]: Finished difference Result 866 states and 1191 transitions. [2021-11-23 16:48:52,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:48:52,618 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2021-11-23 16:48:52,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:52,624 INFO L225 Difference]: With dead ends: 866 [2021-11-23 16:48:52,624 INFO L226 Difference]: Without dead ends: 865 [2021-11-23 16:48:52,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-11-23 16:48:52,626 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 363 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:52,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 476 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:48:52,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-11-23 16:48:52,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 843. [2021-11-23 16:48:52,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 1.3859857482185274) internal successors, (1167), 842 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:52,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1167 transitions. [2021-11-23 16:48:52,654 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1167 transitions. Word has length 194 [2021-11-23 16:48:52,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:52,655 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 1167 transitions. [2021-11-23 16:48:52,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:52,655 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1167 transitions. [2021-11-23 16:48:52,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-23 16:48:52,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:52,660 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 10, 10, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:52,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:52,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 16:48:52,888 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:48:52,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:52,888 INFO L85 PathProgramCache]: Analyzing trace with hash 373374671, now seen corresponding path program 1 times [2021-11-23 16:48:52,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:48:52,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873107959] [2021-11-23 16:48:52,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:52,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:48:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-23 16:48:53,020 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:48:53,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873107959] [2021-11-23 16:48:53,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873107959] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:53,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:53,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:53,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135306200] [2021-11-23 16:48:53,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:53,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:53,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:48:53,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:53,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:53,023 INFO L87 Difference]: Start difference. First operand 843 states and 1167 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:53,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:53,051 INFO L93 Difference]: Finished difference Result 1263 states and 1736 transitions. [2021-11-23 16:48:53,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:53,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-11-23 16:48:53,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:53,055 INFO L225 Difference]: With dead ends: 1263 [2021-11-23 16:48:53,055 INFO L226 Difference]: Without dead ends: 488 [2021-11-23 16:48:53,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:53,058 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 20 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:53,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 194 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:53,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-11-23 16:48:53,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 442. [2021-11-23 16:48:53,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 1.3333333333333333) internal successors, (588), 441 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 588 transitions. [2021-11-23 16:48:53,074 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 588 transitions. Word has length 200 [2021-11-23 16:48:53,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:53,075 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 588 transitions. [2021-11-23 16:48:53,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:53,076 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 588 transitions. [2021-11-23 16:48:53,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-23 16:48:53,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:53,079 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 10, 10, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:53,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 16:48:53,082 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:48:53,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:53,083 INFO L85 PathProgramCache]: Analyzing trace with hash 2136153396, now seen corresponding path program 2 times [2021-11-23 16:48:53,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:48:53,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654700635] [2021-11-23 16:48:53,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:53,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:48:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:53,206 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-11-23 16:48:53,207 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:48:53,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654700635] [2021-11-23 16:48:53,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654700635] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:53,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:53,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:53,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375494404] [2021-11-23 16:48:53,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:53,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:53,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:48:53,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:53,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:53,210 INFO L87 Difference]: Start difference. First operand 442 states and 588 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:53,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:53,238 INFO L93 Difference]: Finished difference Result 647 states and 861 transitions. [2021-11-23 16:48:53,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:53,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2021-11-23 16:48:53,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:53,242 INFO L225 Difference]: With dead ends: 647 [2021-11-23 16:48:53,242 INFO L226 Difference]: Without dead ends: 347 [2021-11-23 16:48:53,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:53,244 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 20 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:53,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 194 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:53,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-11-23 16:48:53,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2021-11-23 16:48:53,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.3179190751445087) internal successors, (456), 346 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 456 transitions. [2021-11-23 16:48:53,263 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 456 transitions. Word has length 208 [2021-11-23 16:48:53,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:53,264 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 456 transitions. [2021-11-23 16:48:53,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:48:53,265 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 456 transitions. [2021-11-23 16:48:53,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-23 16:48:53,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:53,268 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 11, 11, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:53,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 16:48:53,269 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:48:53,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:53,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1687424078, now seen corresponding path program 3 times [2021-11-23 16:48:53,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:48:53,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885296090] [2021-11-23 16:48:53,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:53,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:48:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:53,530 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 30 proven. 606 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 16:48:53,530 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:48:53,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885296090] [2021-11-23 16:48:53,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885296090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 16:48:53,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192313432] [2021-11-23 16:48:53,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:48:53,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:48:53,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:48:53,536 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:48:53,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 16:48:53,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:48:53,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:48:53,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 16:48:53,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 30 proven. 606 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 16:48:54,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 30 proven. 606 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 16:48:54,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192313432] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:48:54,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [391410647] [2021-11-23 16:48:54,797 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2021-11-23 16:48:54,798 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 16:48:54,800 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 16:48:54,800 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 16:48:54,800 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 16:49:10,150 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 16:49:15,991 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27526#(and (<= 0 (+ |ULTIMATE.start_main_~P6~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P5~0#1| 2147483648)) (= (ite (and (< |ULTIMATE.start_main_~P1~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P1~0#1| 2) 0))) (+ (mod |ULTIMATE.start_main_~P1~0#1| 2) (- 2)) (mod |ULTIMATE.start_main_~P1~0#1| 2)) 1) (<= |ULTIMATE.start_main_~P3~0#1| 2147483647) (<= |ULTIMATE.start_main_~this_expect~0#1| 2147483647) (<= |ULTIMATE.start_main_~P2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P9~0#1| 2147483648)) (or (not (= (ite (and (< |ULTIMATE.start_main_~P6~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P6~0#1| 2) 0))) (+ (- 2) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (mod |ULTIMATE.start_main_~P6~0#1| 2)) 1)) (= |ULTIMATE.start_main_~this_buffer_empty~0#1| 1)) (<= |ULTIMATE.start_main_~P9~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~this_buffer_empty~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P4~0#1| 2147483647) (<= |ULTIMATE.start_main_~P5~0#1| 2147483647) (= 5 |ULTIMATE.start_main_~q~0#1|) (<= 0 (+ |ULTIMATE.start_main_~P7~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P3~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P4~0#1| 2147483648)) (< 2147483646 |ULTIMATE.start_main_~this_expect~0#1|) (= 5 |ULTIMATE.start_main_~method_id~0#1|) (<= |ULTIMATE.start_main_~P7~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P8~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P1~0#1| 2147483647) (<= |ULTIMATE.start_main_~P6~0#1| 2147483647) (<= |ULTIMATE.start_main_~P8~0#1| 2147483647))' at error location [2021-11-23 16:49:15,991 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 16:49:15,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 16:49:15,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-11-23 16:49:15,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450537069] [2021-11-23 16:49:15,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 16:49:15,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 16:49:15,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:49:15,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 16:49:15,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=3824, Unknown=0, NotChecked=0, Total=4290 [2021-11-23 16:49:15,996 INFO L87 Difference]: Start difference. First operand 347 states and 456 transitions. Second operand has 19 states, 18 states have (on average 22.61111111111111) internal successors, (407), 19 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:16,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:16,205 INFO L93 Difference]: Finished difference Result 808 states and 1066 transitions. [2021-11-23 16:49:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 16:49:16,206 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 22.61111111111111) internal successors, (407), 19 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2021-11-23 16:49:16,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:16,211 INFO L225 Difference]: With dead ends: 808 [2021-11-23 16:49:16,211 INFO L226 Difference]: Without dead ends: 807 [2021-11-23 16:49:16,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 618 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2320 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=466, Invalid=3824, Unknown=0, NotChecked=0, Total=4290 [2021-11-23 16:49:16,214 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 1352 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1352 SdHoareTripleChecker+Valid, 1393 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:16,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1352 Valid, 1393 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:49:16,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-11-23 16:49:16,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 807. [2021-11-23 16:49:16,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 1.316377171215881) internal successors, (1061), 806 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:16,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1061 transitions. [2021-11-23 16:49:16,242 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1061 transitions. Word has length 224 [2021-11-23 16:49:16,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:16,243 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 1061 transitions. [2021-11-23 16:49:16,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 22.61111111111111) internal successors, (407), 19 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:16,243 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1061 transitions. [2021-11-23 16:49:16,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2021-11-23 16:49:16,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:16,257 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 26, 26, 17, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:16,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:16,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:49:16,472 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:49:16,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:16,472 INFO L85 PathProgramCache]: Analyzing trace with hash -296515235, now seen corresponding path program 4 times [2021-11-23 16:49:16,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:49:16,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885868246] [2021-11-23 16:49:16,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:16,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:49:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3945 backedges. 70 proven. 3806 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 16:49:17,271 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:49:17,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885868246] [2021-11-23 16:49:17,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885868246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 16:49:17,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549047486] [2021-11-23 16:49:17,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 16:49:17,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:49:17,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:49:17,276 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:49:17,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 16:49:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:17,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 2533 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-23 16:49:17,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:18,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3945 backedges. 70 proven. 3806 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 16:49:18,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3945 backedges. 70 proven. 3806 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 16:49:20,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549047486] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:20,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1307082976] [2021-11-23 16:49:20,493 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2021-11-23 16:49:20,493 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 16:49:20,494 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 16:49:20,494 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 16:49:20,494 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 16:49:32,939 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 16:49:44,262 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32455#(and (<= 6 ~m_recv_ack_1_1~0) (<= 0 (+ |ULTIMATE.start_main_~P6~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P5~0#1| 2147483648)) (<= 0 |#NULL.base|) (= (ite (and (< |ULTIMATE.start_main_~P1~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P1~0#1| 2) 0))) (+ (mod |ULTIMATE.start_main_~P1~0#1| 2) (- 2)) (mod |ULTIMATE.start_main_~P1~0#1| 2)) 1) (<= 7 ~m_recv_ack_1_2~0) (<= |ULTIMATE.start_main_~P3~0#1| 2147483647) (<= |ULTIMATE.start_main_~P2~0#1| 2147483647) (<= ~m_msg_2~0 2) (<= 0 (+ |ULTIMATE.start_main_~P9~0#1| 2147483648)) (<= 4 ~m_msg_1_1~0) (<= 5 ~m_msg_1_2~0) (or (not (= (ite (and (< |ULTIMATE.start_main_~P6~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P6~0#1| 2) 0))) (+ (- 2) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (mod |ULTIMATE.start_main_~P6~0#1| 2)) 1)) (= |ULTIMATE.start_main_~this_buffer_empty~0#1| 1)) (<= |#NULL.offset| 0) (<= ~m_msg_1_2~0 5) (or (not (= (ite (and (< |ULTIMATE.start_main_~P6~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P6~0#1| 2) 0))) (+ (- 2) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (mod |ULTIMATE.start_main_~P6~0#1| 2)) 1)) (= (ite (and (< |ULTIMATE.start_main_~P6~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P6~0#1| 2) 0))) (+ (- 2) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (ite (and (not (= (mod |ULTIMATE.start_main_~this_expect~0#1| 2) 0)) (< |ULTIMATE.start_main_~this_expect~0#1| 0)) (+ (- 2) (mod |ULTIMATE.start_main_~this_expect~0#1| 2)) (mod |ULTIMATE.start_main_~this_expect~0#1| 2)))) (<= |ULTIMATE.start_main_~P9~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P4~0#1| 2147483647) (<= ~m_recv_ack_1_1~0 6) (<= |ULTIMATE.start_main_~P5~0#1| 2147483647) (= 5 |ULTIMATE.start_main_~q~0#1|) (<= 0 (+ |ULTIMATE.start_main_~P7~0#1| 2147483648)) (<= ~m_Protocol~0 1) (<= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~P3~0#1| 2147483648)) (<= 2 ~m_msg_2~0) (<= 0 (+ |ULTIMATE.start_main_~P4~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~this_buffer_empty~0#1|) (< 2147483646 |ULTIMATE.start_main_~this_expect~0#1|) (<= ~m_recv_ack_1_2~0 7) (<= |ULTIMATE.start_main_~this_buffer_empty~0#1| 1) (<= 3 ~m_recv_ack_2~0) (= 5 |ULTIMATE.start_main_~method_id~0#1|) (<= 0 |#NULL.offset|) (<= 1 ~m_Protocol~0) (<= |ULTIMATE.start_main_~P7~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= ~m_recv_ack_2~0 3) (<= 0 (+ |ULTIMATE.start_main_~P8~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P1~0#1| 2147483647) (<= |ULTIMATE.start_main_~P6~0#1| 2147483647) (<= |ULTIMATE.start_main_~P8~0#1| 2147483647) (<= ~m_msg_1_1~0 4))' at error location [2021-11-23 16:49:44,262 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 16:49:44,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 16:49:44,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 38 [2021-11-23 16:49:44,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013047488] [2021-11-23 16:49:44,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 16:49:44,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-23 16:49:44,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:49:44,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-23 16:49:44,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1173, Invalid=6309, Unknown=0, NotChecked=0, Total=7482 [2021-11-23 16:49:44,268 INFO L87 Difference]: Start difference. First operand 807 states and 1061 transitions. Second operand has 39 states, 38 states have (on average 24.92105263157895) internal successors, (947), 39 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:45,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:45,058 INFO L93 Difference]: Finished difference Result 1728 states and 2281 transitions. [2021-11-23 16:49:45,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-23 16:49:45,061 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 24.92105263157895) internal successors, (947), 39 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 524 [2021-11-23 16:49:45,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:45,070 INFO L225 Difference]: With dead ends: 1728 [2021-11-23 16:49:45,070 INFO L226 Difference]: Without dead ends: 1727 [2021-11-23 16:49:45,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1606 GetRequests, 1521 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3643 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=1173, Invalid=6309, Unknown=0, NotChecked=0, Total=7482 [2021-11-23 16:49:45,074 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 5625 mSDsluCounter, 2882 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5625 SdHoareTripleChecker+Valid, 2986 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:45,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5625 Valid, 2986 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 16:49:45,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2021-11-23 16:49:45,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1727. [2021-11-23 16:49:45,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1726 states have (on average 1.3157589803012746) internal successors, (2271), 1726 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 2271 transitions. [2021-11-23 16:49:45,124 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 2271 transitions. Word has length 524 [2021-11-23 16:49:45,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:45,125 INFO L470 AbstractCegarLoop]: Abstraction has 1727 states and 2271 transitions. [2021-11-23 16:49:45,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 24.92105263157895) internal successors, (947), 39 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:45,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 2271 transitions. [2021-11-23 16:49:45,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1125 [2021-11-23 16:49:45,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:45,179 INFO L514 BasicCegarLoop]: trace histogram [76, 75, 56, 56, 37, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:45,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-23 16:49:45,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-23 16:49:45,392 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:49:45,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:45,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1967167283, now seen corresponding path program 5 times [2021-11-23 16:49:45,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:49:45,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898633731] [2021-11-23 16:49:45,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:45,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:49:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 18755 backedges. 150 proven. 18456 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-11-23 16:49:47,734 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:49:47,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898633731] [2021-11-23 16:49:47,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898633731] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 16:49:47,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39664799] [2021-11-23 16:49:47,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:49:47,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:49:47,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:49:47,735 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:49:47,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 16:49:49,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-11-23 16:49:49,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:49:49,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 5343 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-23 16:49:49,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:51,580 INFO L134 CoverageAnalysis]: Checked inductivity of 18755 backedges. 150 proven. 18456 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-11-23 16:49:51,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18755 backedges. 150 proven. 18456 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-11-23 16:49:55,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39664799] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:55,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [79953245] [2021-11-23 16:49:55,888 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2021-11-23 16:49:55,888 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 16:49:55,890 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 16:49:55,891 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 16:49:55,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 16:50:00,172 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 16:50:14,903 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42965#(and (<= 0 (+ |ULTIMATE.start_main_~P6~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P5~0#1| 2147483648)) (= 6 ~m_recv_ack_1_1~0) (= (ite (and (< |ULTIMATE.start_main_~P1~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P1~0#1| 2) 0))) (+ (mod |ULTIMATE.start_main_~P1~0#1| 2) (- 2)) (mod |ULTIMATE.start_main_~P1~0#1| 2)) 1) (<= 7 ~m_recv_ack_1_2~0) (<= |ULTIMATE.start_main_~P3~0#1| 2147483647) (<= |ULTIMATE.start_main_~P2~0#1| 2147483647) (<= ~m_msg_2~0 2) (<= 0 (+ |ULTIMATE.start_main_~P9~0#1| 2147483648)) (<= 4 ~m_msg_1_1~0) (<= 5 ~m_msg_1_2~0) (or (not (= (ite (and (< |ULTIMATE.start_main_~P6~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P6~0#1| 2) 0))) (+ (- 2) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (mod |ULTIMATE.start_main_~P6~0#1| 2)) 1)) (= |ULTIMATE.start_main_~this_buffer_empty~0#1| 1)) (<= ~m_msg_1_2~0 5) (or (not (= (ite (and (< |ULTIMATE.start_main_~P6~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P6~0#1| 2) 0))) (+ (- 2) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (mod |ULTIMATE.start_main_~P6~0#1| 2)) 1)) (= (ite (and (< |ULTIMATE.start_main_~P6~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P6~0#1| 2) 0))) (+ (- 2) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (ite (and (not (= (mod |ULTIMATE.start_main_~this_expect~0#1| 2) 0)) (< |ULTIMATE.start_main_~this_expect~0#1| 0)) (+ (- 2) (mod |ULTIMATE.start_main_~this_expect~0#1| 2)) (mod |ULTIMATE.start_main_~this_expect~0#1| 2)))) (<= |ULTIMATE.start_main_~P9~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P4~0#1| 2147483647) (<= |ULTIMATE.start_main_~P5~0#1| 2147483647) (= 5 |ULTIMATE.start_main_~q~0#1|) (<= 0 (+ |ULTIMATE.start_main_~P7~0#1| 2147483648)) (<= ~m_Protocol~0 1) (<= 0 (+ |ULTIMATE.start_main_~P3~0#1| 2147483648)) (<= 2 ~m_msg_2~0) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~P4~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~this_buffer_empty~0#1|) (< 2147483646 |ULTIMATE.start_main_~this_expect~0#1|) (<= ~m_recv_ack_1_2~0 7) (<= |ULTIMATE.start_main_~this_buffer_empty~0#1| 1) (<= 3 ~m_recv_ack_2~0) (= 5 |ULTIMATE.start_main_~method_id~0#1|) (<= 1 ~m_Protocol~0) (<= |ULTIMATE.start_main_~P7~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= ~m_recv_ack_2~0 3) (<= 0 (+ |ULTIMATE.start_main_~P8~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P1~0#1| 2147483647) (<= |ULTIMATE.start_main_~P6~0#1| 2147483647) (<= |ULTIMATE.start_main_~P8~0#1| 2147483647) (= |#NULL.base| 0) (<= ~m_msg_1_1~0 4))' at error location [2021-11-23 16:50:14,903 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 16:50:14,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 16:50:14,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 78 [2021-11-23 16:50:14,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014854550] [2021-11-23 16:50:14,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 16:50:14,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-23 16:50:14,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:50:14,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-23 16:50:14,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3673, Invalid=12329, Unknown=0, NotChecked=0, Total=16002 [2021-11-23 16:50:14,916 INFO L87 Difference]: Start difference. First operand 1727 states and 2271 transitions. Second operand has 79 states, 78 states have (on average 25.987179487179485) internal successors, (2027), 79 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:18,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:18,678 INFO L93 Difference]: Finished difference Result 3568 states and 4711 transitions. [2021-11-23 16:50:18,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-23 16:50:18,680 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 25.987179487179485) internal successors, (2027), 79 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1124 [2021-11-23 16:50:18,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:18,694 INFO L225 Difference]: With dead ends: 3568 [2021-11-23 16:50:18,694 INFO L226 Difference]: Without dead ends: 3567 [2021-11-23 16:50:18,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3446 GetRequests, 3321 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6683 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=3673, Invalid=12329, Unknown=0, NotChecked=0, Total=16002 [2021-11-23 16:50:18,697 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 14338 mSDsluCounter, 5860 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14338 SdHoareTripleChecker+Valid, 5964 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:18,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14338 Valid, 5964 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 16:50:18,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3567 states. [2021-11-23 16:50:18,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3567 to 3567. [2021-11-23 16:50:18,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3567 states, 3566 states have (on average 1.3154795288839036) internal successors, (4691), 3566 states have internal predecessors, (4691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3567 states to 3567 states and 4691 transitions. [2021-11-23 16:50:18,788 INFO L78 Accepts]: Start accepts. Automaton has 3567 states and 4691 transitions. Word has length 1124 [2021-11-23 16:50:18,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:18,791 INFO L470 AbstractCegarLoop]: Abstraction has 3567 states and 4691 transitions. [2021-11-23 16:50:18,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 25.987179487179485) internal successors, (2027), 79 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:50:18,792 INFO L276 IsEmpty]: Start isEmpty. Operand 3567 states and 4691 transitions. [2021-11-23 16:50:18,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2325 [2021-11-23 16:50:18,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:18,847 INFO L514 BasicCegarLoop]: trace histogram [156, 155, 116, 116, 77, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:50:18,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:19,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-23 16:50:19,063 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:50:19,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:19,064 INFO L85 PathProgramCache]: Analyzing trace with hash 630668511, now seen corresponding path program 6 times [2021-11-23 16:50:19,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:50:19,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382669724] [2021-11-23 16:50:19,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:19,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:50:20,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 81375 backedges. 310 proven. 80756 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2021-11-23 16:50:26,334 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:50:26,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382669724] [2021-11-23 16:50:26,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382669724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 16:50:26,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876405987] [2021-11-23 16:50:26,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:50:26,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:50:26,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:50:26,352 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:50:26,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 16:50:28,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:50:28,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:50:28,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 10963 conjuncts, 156 conjunts are in the unsatisfiable core [2021-11-23 16:50:28,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:32,857 INFO L134 CoverageAnalysis]: Checked inductivity of 81375 backedges. 310 proven. 80756 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2021-11-23 16:50:32,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 81375 backedges. 310 proven. 80756 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2021-11-23 16:50:43,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876405987] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:43,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [219628922] [2021-11-23 16:50:43,241 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2021-11-23 16:50:43,241 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 16:50:43,242 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 16:50:43,242 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 16:50:43,242 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 16:50:55,312 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 16:51:12,257 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '64635#(and (<= 6 ~m_recv_ack_1_1~0) (<= 0 (+ |ULTIMATE.start_main_~P6~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P5~0#1| 2147483648)) (<= 0 |#NULL.base|) (= (ite (and (< |ULTIMATE.start_main_~P1~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P1~0#1| 2) 0))) (+ (mod |ULTIMATE.start_main_~P1~0#1| 2) (- 2)) (mod |ULTIMATE.start_main_~P1~0#1| 2)) 1) (<= 7 ~m_recv_ack_1_2~0) (<= |ULTIMATE.start_main_~P3~0#1| 2147483647) (<= |ULTIMATE.start_main_~P2~0#1| 2147483647) (<= ~m_msg_2~0 2) (<= 0 (+ |ULTIMATE.start_main_~P9~0#1| 2147483648)) (<= 4 ~m_msg_1_1~0) (<= 5 ~m_msg_1_2~0) (or (not (= (ite (and (< |ULTIMATE.start_main_~P6~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P6~0#1| 2) 0))) (+ (- 2) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (mod |ULTIMATE.start_main_~P6~0#1| 2)) 1)) (= |ULTIMATE.start_main_~this_buffer_empty~0#1| 1)) (<= |#NULL.offset| 0) (<= ~m_msg_1_2~0 5) (or (not (= (ite (and (< |ULTIMATE.start_main_~P6~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P6~0#1| 2) 0))) (+ (- 2) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (mod |ULTIMATE.start_main_~P6~0#1| 2)) 1)) (= (ite (and (< |ULTIMATE.start_main_~P6~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P6~0#1| 2) 0))) (+ (- 2) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (ite (and (not (= (mod |ULTIMATE.start_main_~this_expect~0#1| 2) 0)) (< |ULTIMATE.start_main_~this_expect~0#1| 0)) (+ (- 2) (mod |ULTIMATE.start_main_~this_expect~0#1| 2)) (mod |ULTIMATE.start_main_~this_expect~0#1| 2)))) (<= |ULTIMATE.start_main_~P9~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P4~0#1| 2147483647) (<= ~m_recv_ack_1_1~0 6) (<= |ULTIMATE.start_main_~P5~0#1| 2147483647) (= 5 |ULTIMATE.start_main_~q~0#1|) (<= 0 (+ |ULTIMATE.start_main_~P7~0#1| 2147483648)) (<= ~m_Protocol~0 1) (<= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~P3~0#1| 2147483648)) (<= 2 ~m_msg_2~0) (<= 0 (+ |ULTIMATE.start_main_~P4~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~this_buffer_empty~0#1|) (< 2147483646 |ULTIMATE.start_main_~this_expect~0#1|) (<= ~m_recv_ack_1_2~0 7) (<= |ULTIMATE.start_main_~this_buffer_empty~0#1| 1) (<= 3 ~m_recv_ack_2~0) (= 5 |ULTIMATE.start_main_~method_id~0#1|) (<= 0 |#NULL.offset|) (<= 1 ~m_Protocol~0) (<= |ULTIMATE.start_main_~P7~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= ~m_recv_ack_2~0 3) (<= 0 (+ |ULTIMATE.start_main_~P8~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P1~0#1| 2147483647) (<= |ULTIMATE.start_main_~P6~0#1| 2147483647) (<= |ULTIMATE.start_main_~P8~0#1| 2147483647) (<= ~m_msg_1_1~0 4))' at error location [2021-11-23 16:51:12,257 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 16:51:12,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 16:51:12,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 158 [2021-11-23 16:51:12,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517433509] [2021-11-23 16:51:12,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 16:51:12,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2021-11-23 16:51:12,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:51:12,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2021-11-23 16:51:12,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13473, Invalid=29169, Unknown=0, NotChecked=0, Total=42642 [2021-11-23 16:51:12,279 INFO L87 Difference]: Start difference. First operand 3567 states and 4691 transitions. Second operand has 159 states, 158 states have (on average 26.5) internal successors, (4187), 159 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:52,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:52,280 INFO L93 Difference]: Finished difference Result 7248 states and 9571 transitions. [2021-11-23 16:51:52,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-11-23 16:51:52,283 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 158 states have (on average 26.5) internal successors, (4187), 159 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2324 [2021-11-23 16:51:52,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:52,324 INFO L225 Difference]: With dead ends: 7248 [2021-11-23 16:51:52,324 INFO L226 Difference]: Without dead ends: 7247 [2021-11-23 16:51:52,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7126 GetRequests, 6921 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12763 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=13473, Invalid=29169, Unknown=0, NotChecked=0, Total=42642 [2021-11-23 16:51:52,330 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 33041 mSDsluCounter, 11958 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 1253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33041 SdHoareTripleChecker+Valid, 12062 SdHoareTripleChecker+Invalid, 2711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1253 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:52,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33041 Valid, 12062 Invalid, 2711 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1253 Valid, 1458 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 16:51:52,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7247 states. [2021-11-23 16:51:52,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7247 to 7247. [2021-11-23 16:51:52,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7247 states, 7246 states have (on average 1.3153463980126967) internal successors, (9531), 7246 states have internal predecessors, (9531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:52,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7247 states to 7247 states and 9531 transitions. [2021-11-23 16:51:52,513 INFO L78 Accepts]: Start accepts. Automaton has 7247 states and 9531 transitions. Word has length 2324 [2021-11-23 16:51:52,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:52,516 INFO L470 AbstractCegarLoop]: Abstraction has 7247 states and 9531 transitions. [2021-11-23 16:51:52,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 158 states have (on average 26.5) internal successors, (4187), 159 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:52,518 INFO L276 IsEmpty]: Start isEmpty. Operand 7247 states and 9531 transitions. [2021-11-23 16:51:52,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4725 [2021-11-23 16:51:52,675 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:52,677 INFO L514 BasicCegarLoop]: trace histogram [316, 315, 236, 236, 157, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:52,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-23 16:51:52,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:52,878 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2021-11-23 16:51:52,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:52,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1465823287, now seen corresponding path program 7 times [2021-11-23 16:51:52,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:51:52,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046825738] [2021-11-23 16:51:52,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:52,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:51:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 338615 backedges. 630 proven. 337356 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2021-11-23 16:52:21,004 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:52:21,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046825738] [2021-11-23 16:52:21,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046825738] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 16:52:21,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909898867] [2021-11-23 16:52:21,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 16:52:21,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:52:21,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:52:21,012 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:52:21,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56a8900a-efcc-46a2-ab72-ff62abd483fc/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 16:52:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:24,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 22203 conjuncts, 316 conjunts are in the unsatisfiable core [2021-11-23 16:52:25,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 338615 backedges. 630 proven. 337356 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2021-11-23 16:52:35,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 338615 backedges. 630 proven. 337356 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2021-11-23 16:53:13,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909898867] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:13,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2001249685] [2021-11-23 16:53:13,014 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2021-11-23 16:53:13,014 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 16:53:13,015 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 16:53:13,015 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 16:53:13,015 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 16:53:26,494 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 16:53:49,935 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '108625#(and (<= 6 ~m_recv_ack_1_1~0) (<= 0 (+ |ULTIMATE.start_main_~P6~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~P5~0#1| 2147483648)) (<= 0 |#NULL.base|) (= (ite (and (< |ULTIMATE.start_main_~P1~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P1~0#1| 2) 0))) (+ (mod |ULTIMATE.start_main_~P1~0#1| 2) (- 2)) (mod |ULTIMATE.start_main_~P1~0#1| 2)) 1) (<= 7 ~m_recv_ack_1_2~0) (<= |ULTIMATE.start_main_~P3~0#1| 2147483647) (<= |ULTIMATE.start_main_~P2~0#1| 2147483647) (<= ~m_msg_2~0 2) (<= 0 (+ |ULTIMATE.start_main_~P9~0#1| 2147483648)) (<= 4 ~m_msg_1_1~0) (<= 5 ~m_msg_1_2~0) (or (not (= (ite (and (< |ULTIMATE.start_main_~P6~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P6~0#1| 2) 0))) (+ (- 2) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (mod |ULTIMATE.start_main_~P6~0#1| 2)) 1)) (= |ULTIMATE.start_main_~this_buffer_empty~0#1| 1)) (<= |#NULL.offset| 0) (<= ~m_msg_1_2~0 5) (or (not (= (ite (and (< |ULTIMATE.start_main_~P6~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P6~0#1| 2) 0))) (+ (- 2) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (mod |ULTIMATE.start_main_~P6~0#1| 2)) 1)) (= (ite (and (< |ULTIMATE.start_main_~P6~0#1| 0) (not (= (mod |ULTIMATE.start_main_~P6~0#1| 2) 0))) (+ (- 2) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (mod |ULTIMATE.start_main_~P6~0#1| 2)) (ite (and (not (= (mod |ULTIMATE.start_main_~this_expect~0#1| 2) 0)) (< |ULTIMATE.start_main_~this_expect~0#1| 0)) (+ (- 2) (mod |ULTIMATE.start_main_~this_expect~0#1| 2)) (mod |ULTIMATE.start_main_~this_expect~0#1| 2)))) (<= |ULTIMATE.start_main_~P9~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~P2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P4~0#1| 2147483647) (<= ~m_recv_ack_1_1~0 6) (<= |ULTIMATE.start_main_~P5~0#1| 2147483647) (= 5 |ULTIMATE.start_main_~q~0#1|) (<= 0 (+ |ULTIMATE.start_main_~P7~0#1| 2147483648)) (<= ~m_Protocol~0 1) (<= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~P3~0#1| 2147483648)) (<= 2 ~m_msg_2~0) (<= 0 (+ |ULTIMATE.start_main_~P4~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~this_buffer_empty~0#1|) (< 2147483646 |ULTIMATE.start_main_~this_expect~0#1|) (<= ~m_recv_ack_1_2~0 7) (<= |ULTIMATE.start_main_~this_buffer_empty~0#1| 1) (<= 3 ~m_recv_ack_2~0) (= 5 |ULTIMATE.start_main_~method_id~0#1|) (<= 0 |#NULL.offset|) (<= 1 ~m_Protocol~0) (<= |ULTIMATE.start_main_~P7~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= ~m_recv_ack_2~0 3) (<= 0 (+ |ULTIMATE.start_main_~P8~0#1| 2147483648)) (<= |ULTIMATE.start_main_~P1~0#1| 2147483647) (<= |ULTIMATE.start_main_~P6~0#1| 2147483647) (<= |ULTIMATE.start_main_~P8~0#1| 2147483647) (<= ~m_msg_1_1~0 4))' at error location [2021-11-23 16:53:49,935 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 16:53:49,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 16:53:49,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [159, 159, 159] total 318 [2021-11-23 16:53:49,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518782206] [2021-11-23 16:53:49,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 16:53:49,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 319 states [2021-11-23 16:53:49,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:53:49,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 319 interpolants. [2021-11-23 16:53:49,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52273, Invalid=82049, Unknown=0, NotChecked=0, Total=134322 [2021-11-23 16:53:49,985 INFO L87 Difference]: Start difference. First operand 7247 states and 9531 transitions. Second operand has 319 states, 318 states have (on average 26.751572327044027) internal successors, (8507), 319 states have internal predecessors, (8507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)