./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark38_conjunctive.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark38_conjunctive.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7 --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 366d45071e2a444aa552f231e24508af3eb704e415c6b738128a0398e54b53a7 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:21:57,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:21:57,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:21:58,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:21:58,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:21:58,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:21:58,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:21:58,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:21:58,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:21:58,036 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:21:58,037 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:21:58,039 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:21:58,040 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:21:58,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:21:58,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:21:58,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:21:58,048 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:21:58,049 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:21:58,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:21:58,055 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:21:58,058 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:21:58,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:21:58,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:21:58,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:21:58,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:21:58,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:21:58,069 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:21:58,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:21:58,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:21:58,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:21:58,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:21:58,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:21:58,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:21:58,077 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:21:58,078 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:21:58,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:21:58,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:21:58,081 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:21:58,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:21:58,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:21:58,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:21:58,092 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/config/svcomp-Overflow-32bit-Taipan_Default.epf [2021-11-25 18:21:58,144 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:21:58,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:21:58,149 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:21:58,150 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:21:58,158 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:21:58,159 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:21:58,159 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:21:58,159 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:21:58,160 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:21:58,160 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:21:58,161 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:21:58,162 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:21:58,162 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:21:58,162 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:21:58,163 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:21:58,163 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:21:58,163 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:21:58,163 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:21:58,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:21:58,165 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:21:58,166 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:21:58,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:21:58,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:21:58,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:21:58,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:21:58,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:21:58,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:21:58,170 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-25 18:21:58,170 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:21:58,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:21:58,170 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:21:58,171 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:21:58,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:21:58,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:21:58,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:21:58,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:21:58,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:21:58,173 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:21:58,173 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:21:58,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:21:58,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:21:58,174 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:21:58,174 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:21:58,174 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_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 366d45071e2a444aa552f231e24508af3eb704e415c6b738128a0398e54b53a7 [2021-11-25 18:21:58,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:21:58,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:21:58,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:21:58,532 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:21:58,533 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:21:58,534 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/loop-zilu/benchmark38_conjunctive.i [2021-11-25 18:21:58,625 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/data/30da08198/1761f3366a1f4c82b1f72528eda0deed/FLAGb2112b409 [2021-11-25 18:21:59,130 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:21:59,131 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/sv-benchmarks/c/loop-zilu/benchmark38_conjunctive.i [2021-11-25 18:21:59,143 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/data/30da08198/1761f3366a1f4c82b1f72528eda0deed/FLAGb2112b409 [2021-11-25 18:21:59,494 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/data/30da08198/1761f3366a1f4c82b1f72528eda0deed [2021-11-25 18:21:59,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:21:59,499 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:21:59,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:21:59,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:21:59,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:21:59,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:21:59" (1/1) ... [2021-11-25 18:21:59,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@385369bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:59, skipping insertion in model container [2021-11-25 18:21:59,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:21:59" (1/1) ... [2021-11-25 18:21:59,530 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:21:59,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:21:59,746 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_162c3572-24d8-4aa3-bbc4-0620eaca019a/sv-benchmarks/c/loop-zilu/benchmark38_conjunctive.i[873,886] [2021-11-25 18:21:59,773 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:21:59,786 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:21:59,812 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_162c3572-24d8-4aa3-bbc4-0620eaca019a/sv-benchmarks/c/loop-zilu/benchmark38_conjunctive.i[873,886] [2021-11-25 18:21:59,819 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:21:59,844 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:21:59,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:59 WrapperNode [2021-11-25 18:21:59,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:21:59,848 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:21:59,848 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:21:59,848 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:21:59,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:59" (1/1) ... [2021-11-25 18:21:59,880 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:59" (1/1) ... [2021-11-25 18:21:59,914 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 40 [2021-11-25 18:21:59,914 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:21:59,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:21:59,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:21:59,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:21:59,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:59" (1/1) ... [2021-11-25 18:21:59,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:59" (1/1) ... [2021-11-25 18:21:59,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:59" (1/1) ... [2021-11-25 18:21:59,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:59" (1/1) ... [2021-11-25 18:21:59,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:59" (1/1) ... [2021-11-25 18:21:59,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:59" (1/1) ... [2021-11-25 18:21:59,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:59" (1/1) ... [2021-11-25 18:21:59,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:21:59,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:21:59,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:21:59,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:21:59,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:59" (1/1) ... [2021-11-25 18:21:59,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:21:59,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:00,003 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:22:00,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:22:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:22:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:22:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:22:00,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:22:00,123 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:22:00,125 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:22:00,242 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:22:00,261 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:22:00,262 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 18:22:00,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:22:00 BoogieIcfgContainer [2021-11-25 18:22:00,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:22:00,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:22:00,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:22:00,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:22:00,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:21:59" (1/3) ... [2021-11-25 18:22:00,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@679be386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:22:00, skipping insertion in model container [2021-11-25 18:22:00,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:59" (2/3) ... [2021-11-25 18:22:00,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@679be386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:22:00, skipping insertion in model container [2021-11-25 18:22:00,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:22:00" (3/3) ... [2021-11-25 18:22:00,272 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark38_conjunctive.i [2021-11-25 18:22:00,276 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:22:00,277 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-25 18:22:00,320 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:22:00,328 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 [2021-11-25 18:22:00,328 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-25 18:22:00,342 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 10 states have (on average 1.8) internal successors, (18), 16 states have internal predecessors, (18), 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) [2021-11-25 18:22:00,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 18:22:00,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:00,347 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 18:22:00,348 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:22:00,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:00,354 INFO L85 PathProgramCache]: Analyzing trace with hash 2181983, now seen corresponding path program 1 times [2021-11-25 18:22:00,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:00,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590683253] [2021-11-25 18:22:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:00,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:00,545 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:00,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590683253] [2021-11-25 18:22:00,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590683253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:00,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:22:00,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:22:00,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397469301] [2021-11-25 18:22:00,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:00,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:22:00,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:00,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:22:00,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:22:00,631 INFO L87 Difference]: Start difference. First operand has 17 states, 10 states have (on average 1.8) internal successors, (18), 16 states have internal predecessors, (18), 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, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-25 18:22:00,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:00,712 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-11-25 18:22:00,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:22:00,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-11-25 18:22:00,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:00,722 INFO L225 Difference]: With dead ends: 27 [2021-11-25 18:22:00,723 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 18:22:00,725 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 [2021-11-25 18:22:00,732 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:00,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 19 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:22:00,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 18:22:00,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2021-11-25 18:22:00,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 16 states have internal predecessors, (18), 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) [2021-11-25 18:22:00,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-25 18:22:00,763 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 4 [2021-11-25 18:22:00,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:00,764 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-25 18:22:00,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-25 18:22:00,764 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-25 18:22:00,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 18:22:00,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:00,765 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 18:22:00,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:22:00,766 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:22:00,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:00,770 INFO L85 PathProgramCache]: Analyzing trace with hash 2182862, now seen corresponding path program 1 times [2021-11-25 18:22:00,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:00,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529701206] [2021-11-25 18:22:00,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:00,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:00,808 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:00,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529701206] [2021-11-25 18:22:00,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529701206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:00,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:22:00,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:22:00,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133236712] [2021-11-25 18:22:00,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:00,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:22:00,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:00,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:22:00,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:22:00,813 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-25 18:22:00,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:00,842 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-11-25 18:22:00,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:22:00,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-11-25 18:22:00,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:00,844 INFO L225 Difference]: With dead ends: 26 [2021-11-25 18:22:00,844 INFO L226 Difference]: Without dead ends: 25 [2021-11-25 18:22:00,845 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 [2021-11-25 18:22:00,847 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:00,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 17 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:22:00,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-25 18:22:00,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2021-11-25 18:22:00,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 17 states have internal predecessors, (19), 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) [2021-11-25 18:22:00,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-25 18:22:00,853 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 4 [2021-11-25 18:22:00,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:00,854 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-25 18:22:00,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-25 18:22:00,854 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-25 18:22:00,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 18:22:00,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:00,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 18:22:00,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:22:00,855 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:22:00,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:00,856 INFO L85 PathProgramCache]: Analyzing trace with hash 67641523, now seen corresponding path program 1 times [2021-11-25 18:22:00,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:00,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220141466] [2021-11-25 18:22:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:00,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:00,886 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:00,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220141466] [2021-11-25 18:22:00,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220141466] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:00,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:22:00,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-25 18:22:00,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917669327] [2021-11-25 18:22:00,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:00,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:22:00,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:00,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:22:00,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:22:00,890 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-25 18:22:00,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:00,903 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-11-25 18:22:00,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:22:00,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-11-25 18:22:00,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:00,905 INFO L225 Difference]: With dead ends: 18 [2021-11-25 18:22:00,905 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 18:22:00,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:22:00,907 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:00,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:22:00,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 18:22:00,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-25 18:22:00,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 16 states have internal predecessors, (18), 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) [2021-11-25 18:22:00,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-25 18:22:00,913 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 5 [2021-11-25 18:22:00,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:00,914 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-25 18:22:00,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-25 18:22:00,915 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-25 18:22:00,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 18:22:00,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:00,915 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 18:22:00,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:22:00,917 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:22:00,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:00,918 INFO L85 PathProgramCache]: Analyzing trace with hash 67668783, now seen corresponding path program 1 times [2021-11-25 18:22:00,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:00,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275172729] [2021-11-25 18:22:00,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:00,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:00,945 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:00,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275172729] [2021-11-25 18:22:00,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275172729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:00,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:22:00,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:22:00,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602308005] [2021-11-25 18:22:00,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:00,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:22:00,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:00,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:22:00,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:22:00,953 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-11-25 18:22:00,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:00,984 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-11-25 18:22:00,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:22:00,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2021-11-25 18:22:00,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:00,990 INFO L225 Difference]: With dead ends: 24 [2021-11-25 18:22:00,990 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 18:22:00,990 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 [2021-11-25 18:22:00,992 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:00,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 16 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:22:00,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 18:22:01,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2021-11-25 18:22:01,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 15 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) [2021-11-25 18:22:01,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-11-25 18:22:01,005 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 5 [2021-11-25 18:22:01,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:01,006 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-11-25 18:22:01,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-11-25 18:22:01,020 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-11-25 18:22:01,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:22:01,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:01,021 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:22:01,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:22:01,021 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:22:01,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:01,022 INFO L85 PathProgramCache]: Analyzing trace with hash 2096887265, now seen corresponding path program 1 times [2021-11-25 18:22:01,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:01,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370136810] [2021-11-25 18:22:01,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:01,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:01,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:01,073 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:01,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370136810] [2021-11-25 18:22:01,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370136810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:01,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:22:01,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:22:01,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306539323] [2021-11-25 18:22:01,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:01,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:22:01,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:01,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:22:01,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:22:01,077 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-11-25 18:22:01,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:01,138 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-11-25 18:22:01,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:22:01,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2021-11-25 18:22:01,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:01,154 INFO L225 Difference]: With dead ends: 21 [2021-11-25 18:22:01,155 INFO L226 Difference]: Without dead ends: 20 [2021-11-25 18:22:01,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:22:01,157 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:01,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 21 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:22:01,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-25 18:22:01,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-25 18:22:01,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 17 states have internal predecessors, (18), 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) [2021-11-25 18:22:01,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-11-25 18:22:01,161 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 6 [2021-11-25 18:22:01,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:01,162 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-11-25 18:22:01,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-11-25 18:22:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-11-25 18:22:01,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 18:22:01,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:01,163 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:22:01,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:22:01,163 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:22:01,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:01,164 INFO L85 PathProgramCache]: Analyzing trace with hash 578995829, now seen corresponding path program 1 times [2021-11-25 18:22:01,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:01,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623918856] [2021-11-25 18:22:01,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:01,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:01,234 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:01,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623918856] [2021-11-25 18:22:01,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623918856] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:01,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:22:01,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:22:01,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553306236] [2021-11-25 18:22:01,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:01,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:22:01,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:01,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:22:01,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:22:01,239 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-11-25 18:22:01,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:01,282 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-11-25 18:22:01,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:22:01,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-11-25 18:22:01,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:01,284 INFO L225 Difference]: With dead ends: 18 [2021-11-25 18:22:01,285 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 18:22:01,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:22:01,287 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:01,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 8 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:22:01,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 18:22:01,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-25 18:22:01,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 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) [2021-11-25 18:22:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-25 18:22:01,303 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 7 [2021-11-25 18:22:01,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:01,303 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-25 18:22:01,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-11-25 18:22:01,304 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-25 18:22:01,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:22:01,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:01,306 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:22:01,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:22:01,307 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:22:01,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:01,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1930755337, now seen corresponding path program 1 times [2021-11-25 18:22:01,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:01,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030435574] [2021-11-25 18:22:01,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:01,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:01,377 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:01,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030435574] [2021-11-25 18:22:01,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030435574] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:01,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981992429] [2021-11-25 18:22:01,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:01,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:01,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:01,380 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:01,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:22:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:01,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:22:01,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:01,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:22:01,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:01,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981992429] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:22:01,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [877371387] [2021-11-25 18:22:01,545 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:22:01,546 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:22:01,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:22:01,556 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:22:01,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:22:02,093 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:22:02,371 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '359#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483643 |ULTIMATE.start_main_~x~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:22:02,371 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:22:02,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:22:02,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-25 18:22:02,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493197774] [2021-11-25 18:22:02,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:22:02,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:22:02,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:02,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:22:02,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:22:02,374 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 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) [2021-11-25 18:22:02,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:02,421 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-11-25 18:22:02,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:22:02,422 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 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 [2021-11-25 18:22:02,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:02,424 INFO L225 Difference]: With dead ends: 37 [2021-11-25 18:22:02,425 INFO L226 Difference]: Without dead ends: 36 [2021-11-25 18:22:02,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:22:02,428 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:02,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:22:02,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-25 18:22:02,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2021-11-25 18:22:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.32) internal successors, (33), 27 states have internal predecessors, (33), 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) [2021-11-25 18:22:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-25 18:22:02,438 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 9 [2021-11-25 18:22:02,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:02,443 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-25 18:22:02,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 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) [2021-11-25 18:22:02,444 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-25 18:22:02,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:22:02,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:02,445 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:22:02,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:02,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:02,670 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:22:02,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:02,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1930754458, now seen corresponding path program 1 times [2021-11-25 18:22:02,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:02,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570616784] [2021-11-25 18:22:02,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:02,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:02,717 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:02,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570616784] [2021-11-25 18:22:02,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570616784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:02,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059988116] [2021-11-25 18:22:02,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:02,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:02,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:02,724 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:02,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:22:02,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:02,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:22:02,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:02,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:22:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:02,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059988116] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:22:02,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [336980887] [2021-11-25 18:22:02,865 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:22:02,865 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:22:02,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:22:02,866 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:22:02,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:22:03,172 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:22:03,497 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '497#(and (< 2147483647 (* 4 |ULTIMATE.start_main_~y~0#1|)) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~y~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 4 |ULTIMATE.start_main_~x~0#1|) (= |#NULL.base| 0))' at error location [2021-11-25 18:22:03,498 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:22:03,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:22:03,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-25 18:22:03,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713938146] [2021-11-25 18:22:03,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:22:03,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:22:03,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:03,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:22:03,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-11-25 18:22:03,500 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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) [2021-11-25 18:22:03,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:03,568 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-11-25 18:22:03,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:22:03,568 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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 [2021-11-25 18:22:03,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:03,569 INFO L225 Difference]: With dead ends: 33 [2021-11-25 18:22:03,569 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 18:22:03,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:22:03,570 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:03,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:22:03,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 18:22:03,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-11-25 18:22:03,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 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) [2021-11-25 18:22:03,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-11-25 18:22:03,575 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 9 [2021-11-25 18:22:03,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:03,576 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-11-25 18:22:03,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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) [2021-11-25 18:22:03,576 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-11-25 18:22:03,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 18:22:03,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:03,577 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1] [2021-11-25 18:22:03,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 18:22:03,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:03,791 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:22:03,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:03,791 INFO L85 PathProgramCache]: Analyzing trace with hash -770493215, now seen corresponding path program 1 times [2021-11-25 18:22:03,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:03,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697402844] [2021-11-25 18:22:03,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:03,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:03,865 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:03,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697402844] [2021-11-25 18:22:03,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697402844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:03,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799078662] [2021-11-25 18:22:03,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:03,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:03,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:03,870 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:03,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:22:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:03,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:22:03,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:03,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:22:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:04,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799078662] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:22:04,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1676748372] [2021-11-25 18:22:04,066 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:22:04,066 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:22:04,067 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:22:04,067 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:22:04,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:22:04,274 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:22:04,557 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '683#(and (= |ULTIMATE.start_main_#t~post4#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 4 |ULTIMATE.start_main_~x~0#1|) (= |#NULL.base| 0))' at error location [2021-11-25 18:22:04,557 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:22:04,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:22:04,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-25 18:22:04,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454049459] [2021-11-25 18:22:04,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:22:04,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 18:22:04,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:04,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 18:22:04,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:22:04,560 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 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) [2021-11-25 18:22:04,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:04,684 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-11-25 18:22:04,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 18:22:04,685 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 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 [2021-11-25 18:22:04,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:04,686 INFO L225 Difference]: With dead ends: 50 [2021-11-25 18:22:04,686 INFO L226 Difference]: Without dead ends: 49 [2021-11-25 18:22:04,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-11-25 18:22:04,687 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 39 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:04,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 31 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:22:04,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-25 18:22:04,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-11-25 18:22:04,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 39 states have internal predecessors, (45), 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) [2021-11-25 18:22:04,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-11-25 18:22:04,693 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 16 [2021-11-25 18:22:04,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:04,693 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-11-25 18:22:04,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 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) [2021-11-25 18:22:04,694 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-11-25 18:22:04,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 18:22:04,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:04,695 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1] [2021-11-25 18:22:04,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:04,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-25 18:22:04,895 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:22:04,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:04,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1458083994, now seen corresponding path program 2 times [2021-11-25 18:22:04,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:04,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679394658] [2021-11-25 18:22:04,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:04,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:04,977 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:04,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679394658] [2021-11-25 18:22:04,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679394658] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:04,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854985591] [2021-11-25 18:22:04,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:22:04,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:04,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:04,979 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:05,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:22:05,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 18:22:05,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:22:05,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:22:05,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:05,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:22:05,208 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:05,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854985591] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:22:05,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [393364186] [2021-11-25 18:22:05,211 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:22:05,211 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:22:05,212 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:22:05,212 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:22:05,212 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:22:05,424 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:22:05,719 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '930#(and (< 2147483647 (* 4 |ULTIMATE.start_main_~y~0#1|)) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~y~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 4 |ULTIMATE.start_main_~x~0#1|) (= |#NULL.base| 0))' at error location [2021-11-25 18:22:05,720 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:22:05,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:22:05,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-11-25 18:22:05,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851219248] [2021-11-25 18:22:05,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:22:05,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-25 18:22:05,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:05,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-25 18:22:05,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-11-25 18:22:05,722 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 16 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) [2021-11-25 18:22:05,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:05,851 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2021-11-25 18:22:05,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 18:22:05,852 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 16 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 19 [2021-11-25 18:22:05,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:05,853 INFO L225 Difference]: With dead ends: 55 [2021-11-25 18:22:05,853 INFO L226 Difference]: Without dead ends: 50 [2021-11-25 18:22:05,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=640, Unknown=0, NotChecked=0, Total=812 [2021-11-25 18:22:05,854 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:05,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 46 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:22:05,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-25 18:22:05,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-11-25 18:22:05,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 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) [2021-11-25 18:22:05,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-11-25 18:22:05,860 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 19 [2021-11-25 18:22:05,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:05,860 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-11-25 18:22:05,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 16 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) [2021-11-25 18:22:05,860 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-11-25 18:22:05,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 18:22:05,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:05,861 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1] [2021-11-25 18:22:05,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:06,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 18:22:06,082 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:22:06,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:06,082 INFO L85 PathProgramCache]: Analyzing trace with hash 90474847, now seen corresponding path program 2 times [2021-11-25 18:22:06,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:06,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298553160] [2021-11-25 18:22:06,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:06,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:06,163 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:06,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298553160] [2021-11-25 18:22:06,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298553160] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:06,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996396123] [2021-11-25 18:22:06,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:22:06,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:06,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:06,178 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:06,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:22:06,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 18:22:06,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:22:06,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:22:06,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:06,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:22:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:06,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996396123] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:22:06,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [267335343] [2021-11-25 18:22:06,392 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:22:06,392 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:22:06,392 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:22:06,393 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:22:06,393 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:22:06,575 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:22:06,801 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1212#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483643 |ULTIMATE.start_main_~x~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:22:06,801 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:22:06,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:22:06,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-25 18:22:06,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599413705] [2021-11-25 18:22:06,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:22:06,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:22:06,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:06,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:22:06,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-11-25 18:22:06,803 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 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) [2021-11-25 18:22:06,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:06,848 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2021-11-25 18:22:06,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:22:06,848 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 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 [2021-11-25 18:22:06,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:06,849 INFO L225 Difference]: With dead ends: 68 [2021-11-25 18:22:06,849 INFO L226 Difference]: Without dead ends: 67 [2021-11-25 18:22:06,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-11-25 18:22:06,850 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:06,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 47 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:22:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-25 18:22:06,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2021-11-25 18:22:06,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 57 states have internal predecessors, (64), 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) [2021-11-25 18:22:06,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2021-11-25 18:22:06,857 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 24 [2021-11-25 18:22:06,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:06,857 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2021-11-25 18:22:06,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 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) [2021-11-25 18:22:06,857 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2021-11-25 18:22:06,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 18:22:06,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:06,858 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1] [2021-11-25 18:22:06,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:07,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:07,082 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:22:07,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:07,082 INFO L85 PathProgramCache]: Analyzing trace with hash -966167839, now seen corresponding path program 2 times [2021-11-25 18:22:07,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:07,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233420250] [2021-11-25 18:22:07,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:07,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:07,234 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:07,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233420250] [2021-11-25 18:22:07,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233420250] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:07,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037117401] [2021-11-25 18:22:07,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:22:07,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:07,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:07,241 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:07,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:22:07,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-25 18:22:07,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:22:07,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 18:22:07,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:07,384 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:07,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:22:07,658 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:07,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037117401] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:22:07,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1970953292] [2021-11-25 18:22:07,661 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:22:07,661 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:22:07,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:22:07,661 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:22:07,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:22:07,832 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:22:08,117 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1607#(and (= |ULTIMATE.start_main_#t~post4#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 4 |ULTIMATE.start_main_~x~0#1|) (= |#NULL.base| 0))' at error location [2021-11-25 18:22:08,118 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:22:08,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:22:08,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2021-11-25 18:22:08,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256842431] [2021-11-25 18:22:08,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:22:08,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-25 18:22:08,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:08,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-25 18:22:08,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1069, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 18:22:08,120 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 30 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 30 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) [2021-11-25 18:22:08,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:08,473 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2021-11-25 18:22:08,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-25 18:22:08,473 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 30 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 36 [2021-11-25 18:22:08,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:08,474 INFO L225 Difference]: With dead ends: 100 [2021-11-25 18:22:08,475 INFO L226 Difference]: Without dead ends: 99 [2021-11-25 18:22:08,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=593, Invalid=1957, Unknown=0, NotChecked=0, Total=2550 [2021-11-25 18:22:08,477 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 101 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:08,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 70 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:22:08,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-25 18:22:08,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2021-11-25 18:22:08,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 79 states have internal predecessors, (91), 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) [2021-11-25 18:22:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-11-25 18:22:08,485 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 36 [2021-11-25 18:22:08,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:08,485 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-11-25 18:22:08,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 30 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) [2021-11-25 18:22:08,486 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-11-25 18:22:08,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 18:22:08,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:08,487 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1] [2021-11-25 18:22:08,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-25 18:22:08,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 18:22:08,714 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:22:08,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:08,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1764780390, now seen corresponding path program 3 times [2021-11-25 18:22:08,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:08,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307880924] [2021-11-25 18:22:08,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:08,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:08,886 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:08,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307880924] [2021-11-25 18:22:08,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307880924] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:08,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516038497] [2021-11-25 18:22:08,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:22:08,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:08,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:08,888 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:08,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:22:08,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:22:08,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:22:08,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 18:22:08,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:09,009 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:09,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:22:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:09,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516038497] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:22:09,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [40653382] [2021-11-25 18:22:09,297 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:22:09,297 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:22:09,297 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:22:09,298 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:22:09,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:22:09,473 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:22:09,822 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2112#(and (< 2147483647 (* 4 |ULTIMATE.start_main_~y~0#1|)) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~y~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 4 |ULTIMATE.start_main_~x~0#1|) (= |#NULL.base| 0))' at error location [2021-11-25 18:22:09,822 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:22:09,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:22:09,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2021-11-25 18:22:09,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19461828] [2021-11-25 18:22:09,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:22:09,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-25 18:22:09,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:09,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-25 18:22:09,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1189, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 18:22:09,825 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 32 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 32 states have internal predecessors, (77), 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) [2021-11-25 18:22:10,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:10,135 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2021-11-25 18:22:10,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-25 18:22:10,136 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 32 states have internal predecessors, (77), 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 39 [2021-11-25 18:22:10,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:10,137 INFO L225 Difference]: With dead ends: 101 [2021-11-25 18:22:10,137 INFO L226 Difference]: Without dead ends: 92 [2021-11-25 18:22:10,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=644, Invalid=2112, Unknown=0, NotChecked=0, Total=2756 [2021-11-25 18:22:10,140 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 116 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:10,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 71 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:22:10,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-25 18:22:10,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 82. [2021-11-25 18:22:10,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 79 states have (on average 1.0886075949367089) internal successors, (86), 81 states have internal predecessors, (86), 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) [2021-11-25 18:22:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-11-25 18:22:10,154 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 39 [2021-11-25 18:22:10,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:10,155 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-11-25 18:22:10,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 32 states have internal predecessors, (77), 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) [2021-11-25 18:22:10,155 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-11-25 18:22:10,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 18:22:10,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:10,159 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1] [2021-11-25 18:22:10,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:10,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 18:22:10,374 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:22:10,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:10,374 INFO L85 PathProgramCache]: Analyzing trace with hash -548616609, now seen corresponding path program 3 times [2021-11-25 18:22:10,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:10,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492133554] [2021-11-25 18:22:10,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:10,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:10,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:10,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492133554] [2021-11-25 18:22:10,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492133554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:10,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071284415] [2021-11-25 18:22:10,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:22:10,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:10,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:10,518 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:10,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:22:10,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:22:10,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:22:10,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 18:22:10,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:10,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:22:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:10,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071284415] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:22:10,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2061408853] [2021-11-25 18:22:10,982 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:22:10,982 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:22:10,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:22:10,983 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:22:10,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:22:11,125 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:22:11,340 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2704#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483643 |ULTIMATE.start_main_~x~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:22:11,340 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:22:11,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:22:11,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-11-25 18:22:11,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164640427] [2021-11-25 18:22:11,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:22:11,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 18:22:11,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:11,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 18:22:11,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-11-25 18:22:11,344 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 24 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 24 states have internal predecessors, (107), 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) [2021-11-25 18:22:11,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:11,430 INFO L93 Difference]: Finished difference Result 140 states and 151 transitions. [2021-11-25 18:22:11,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 18:22:11,431 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 24 states have internal predecessors, (107), 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 54 [2021-11-25 18:22:11,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:11,432 INFO L225 Difference]: With dead ends: 140 [2021-11-25 18:22:11,432 INFO L226 Difference]: Without dead ends: 139 [2021-11-25 18:22:11,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-11-25 18:22:11,433 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 115 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:11,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 93 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:22:11,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-25 18:22:11,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 118. [2021-11-25 18:22:11,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 117 states have internal predecessors, (132), 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) [2021-11-25 18:22:11,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 132 transitions. [2021-11-25 18:22:11,442 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 132 transitions. Word has length 54 [2021-11-25 18:22:11,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:11,443 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 132 transitions. [2021-11-25 18:22:11,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 24 states have internal predecessors, (107), 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) [2021-11-25 18:22:11,443 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 132 transitions. [2021-11-25 18:22:11,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 18:22:11,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:11,445 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 1, 1, 1] [2021-11-25 18:22:11,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:11,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 18:22:11,662 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:22:11,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:11,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1878322913, now seen corresponding path program 3 times [2021-11-25 18:22:11,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:11,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321227919] [2021-11-25 18:22:11,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:11,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:11,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:12,088 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:12,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321227919] [2021-11-25 18:22:12,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321227919] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:12,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054519233] [2021-11-25 18:22:12,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:22:12,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:12,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:12,089 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:12,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:22:12,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:22:12,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:22:12,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-25 18:22:12,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:12,319 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:12,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:22:13,205 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:13,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054519233] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:22:13,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [916805476] [2021-11-25 18:22:13,207 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:22:13,207 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:22:13,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:22:13,208 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:22:13,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:22:13,389 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:22:13,681 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3527#(and (= |ULTIMATE.start_main_#t~post4#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 4 |ULTIMATE.start_main_~x~0#1|) (= |#NULL.base| 0))' at error location [2021-11-25 18:22:13,682 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:22:13,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:22:13,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2021-11-25 18:22:13,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67017070] [2021-11-25 18:22:13,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:22:13,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-25 18:22:13,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:13,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-25 18:22:13,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1014, Invalid=3678, Unknown=0, NotChecked=0, Total=4692 [2021-11-25 18:22:13,686 INFO L87 Difference]: Start difference. First operand 118 states and 132 transitions. Second operand has 62 states, 61 states have (on average 2.4754098360655736) internal successors, (151), 62 states have internal predecessors, (151), 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) [2021-11-25 18:22:14,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:14,492 INFO L93 Difference]: Finished difference Result 200 states and 215 transitions. [2021-11-25 18:22:14,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-25 18:22:14,492 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.4754098360655736) internal successors, (151), 62 states have internal predecessors, (151), 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 76 [2021-11-25 18:22:14,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:14,494 INFO L225 Difference]: With dead ends: 200 [2021-11-25 18:22:14,494 INFO L226 Difference]: Without dead ends: 199 [2021-11-25 18:22:14,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2348 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2440, Invalid=7262, Unknown=0, NotChecked=0, Total=9702 [2021-11-25 18:22:14,499 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 319 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:14,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 95 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:22:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-25 18:22:14,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 160. [2021-11-25 18:22:14,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 157 states have (on average 1.1656050955414012) internal successors, (183), 159 states have internal predecessors, (183), 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) [2021-11-25 18:22:14,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 183 transitions. [2021-11-25 18:22:14,509 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 183 transitions. Word has length 76 [2021-11-25 18:22:14,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:14,510 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 183 transitions. [2021-11-25 18:22:14,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.4754098360655736) internal successors, (151), 62 states have internal predecessors, (151), 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) [2021-11-25 18:22:14,510 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 183 transitions. [2021-11-25 18:22:14,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-25 18:22:14,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:14,511 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1] [2021-11-25 18:22:14,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:14,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:14,726 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:22:14,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:14,726 INFO L85 PathProgramCache]: Analyzing trace with hash -2010944154, now seen corresponding path program 4 times [2021-11-25 18:22:14,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:14,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161570378] [2021-11-25 18:22:14,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:14,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:15,152 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:15,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161570378] [2021-11-25 18:22:15,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161570378] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:15,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120346876] [2021-11-25 18:22:15,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:22:15,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:15,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:15,158 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:15,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:22:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:15,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-25 18:22:15,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:15,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:22:16,315 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:16,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120346876] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:22:16,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1672806456] [2021-11-25 18:22:16,317 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:22:16,317 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:22:16,318 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:22:16,318 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:22:16,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:22:16,517 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:22:16,824 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4548#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (< 2147483647 (* 4 |ULTIMATE.start_main_~y~0#1|)) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~y~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:22:16,825 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:22:16,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:22:16,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2021-11-25 18:22:16,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290294928] [2021-11-25 18:22:16,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:22:16,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-25 18:22:16,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:16,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-25 18:22:16,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1078, Invalid=3892, Unknown=0, NotChecked=0, Total=4970 [2021-11-25 18:22:16,829 INFO L87 Difference]: Start difference. First operand 160 states and 183 transitions. Second operand has 64 states, 63 states have (on average 2.492063492063492) internal successors, (157), 64 states have internal predecessors, (157), 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) [2021-11-25 18:22:17,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:17,754 INFO L93 Difference]: Finished difference Result 193 states and 208 transitions. [2021-11-25 18:22:17,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-25 18:22:17,755 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 2.492063492063492) internal successors, (157), 64 states have internal predecessors, (157), 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 79 [2021-11-25 18:22:17,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:17,756 INFO L225 Difference]: With dead ends: 193 [2021-11-25 18:22:17,756 INFO L226 Difference]: Without dead ends: 176 [2021-11-25 18:22:17,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2446 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2549, Invalid=7551, Unknown=0, NotChecked=0, Total=10100 [2021-11-25 18:22:17,761 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 296 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:17,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 117 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:22:17,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-25 18:22:17,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 162. [2021-11-25 18:22:17,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 159 states have (on average 1.069182389937107) internal successors, (170), 161 states have internal predecessors, (170), 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) [2021-11-25 18:22:17,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 170 transitions. [2021-11-25 18:22:17,769 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 170 transitions. Word has length 79 [2021-11-25 18:22:17,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:17,769 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 170 transitions. [2021-11-25 18:22:17,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 2.492063492063492) internal successors, (157), 64 states have internal predecessors, (157), 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) [2021-11-25 18:22:17,770 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 170 transitions. [2021-11-25 18:22:17,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-25 18:22:17,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:17,771 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1] [2021-11-25 18:22:17,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:17,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 18:22:17,994 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:22:17,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:17,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1072496545, now seen corresponding path program 4 times [2021-11-25 18:22:17,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:17,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062752377] [2021-11-25 18:22:17,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:17,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:18,355 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:18,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062752377] [2021-11-25 18:22:18,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062752377] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:18,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154999332] [2021-11-25 18:22:18,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:22:18,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:18,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:18,367 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:18,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:22:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:18,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 18:22:18,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:18,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:22:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:19,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154999332] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:22:19,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1925227243] [2021-11-25 18:22:19,379 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:22:19,379 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:22:19,379 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:22:19,380 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:22:19,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:22:19,526 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:22:19,845 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5760#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483643 |ULTIMATE.start_main_~x~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:22:19,846 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:22:19,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:22:19,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-11-25 18:22:19,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255614292] [2021-11-25 18:22:19,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:22:19,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 18:22:19,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:19,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 18:22:19,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1149, Invalid=1821, Unknown=0, NotChecked=0, Total=2970 [2021-11-25 18:22:19,849 INFO L87 Difference]: Start difference. First operand 162 states and 170 transitions. Second operand has 48 states, 47 states have (on average 4.829787234042553) internal successors, (227), 48 states have internal predecessors, (227), 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) [2021-11-25 18:22:20,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:20,013 INFO L93 Difference]: Finished difference Result 284 states and 307 transitions. [2021-11-25 18:22:20,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-25 18:22:20,015 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.829787234042553) internal successors, (227), 48 states have internal predecessors, (227), 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 114 [2021-11-25 18:22:20,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:20,017 INFO L225 Difference]: With dead ends: 284 [2021-11-25 18:22:20,017 INFO L226 Difference]: Without dead ends: 283 [2021-11-25 18:22:20,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1149, Invalid=1821, Unknown=0, NotChecked=0, Total=2970 [2021-11-25 18:22:20,020 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 194 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:20,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 181 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:22:20,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-25 18:22:20,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 238. [2021-11-25 18:22:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 235 states have (on average 1.1404255319148937) internal successors, (268), 237 states have internal predecessors, (268), 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) [2021-11-25 18:22:20,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 268 transitions. [2021-11-25 18:22:20,030 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 268 transitions. Word has length 114 [2021-11-25 18:22:20,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:20,030 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 268 transitions. [2021-11-25 18:22:20,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.829787234042553) internal successors, (227), 48 states have internal predecessors, (227), 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) [2021-11-25 18:22:20,031 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 268 transitions. [2021-11-25 18:22:20,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-25 18:22:20,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:20,032 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 1, 1, 1] [2021-11-25 18:22:20,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:20,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 18:22:20,246 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:22:20,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:20,246 INFO L85 PathProgramCache]: Analyzing trace with hash 679995105, now seen corresponding path program 4 times [2021-11-25 18:22:20,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:20,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721975328] [2021-11-25 18:22:20,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:20,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 2295 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:21,513 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:21,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721975328] [2021-11-25 18:22:21,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721975328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:21,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8615170] [2021-11-25 18:22:21,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:22:21,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:21,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:21,514 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:21,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 18:22:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:21,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-25 18:22:21,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 2295 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:21,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:22:24,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 2295 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:24,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8615170] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:22:24,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [11221972] [2021-11-25 18:22:24,761 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:22:24,761 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:22:24,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:22:24,761 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:22:24,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:22:24,878 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:22:25,407 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7439#(and (= |ULTIMATE.start_main_#t~post4#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 4 |ULTIMATE.start_main_~x~0#1|) (= |#NULL.base| 0))' at error location [2021-11-25 18:22:25,408 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:22:25,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:22:25,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 125 [2021-11-25 18:22:25,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43251111] [2021-11-25 18:22:25,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:22:25,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-11-25 18:22:25,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:25,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-11-25 18:22:25,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4054, Invalid=13502, Unknown=0, NotChecked=0, Total=17556 [2021-11-25 18:22:25,417 INFO L87 Difference]: Start difference. First operand 238 states and 268 transitions. Second operand has 126 states, 125 states have (on average 2.488) internal successors, (311), 126 states have internal predecessors, (311), 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) [2021-11-25 18:22:28,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:28,141 INFO L93 Difference]: Finished difference Result 400 states and 431 transitions. [2021-11-25 18:22:28,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-11-25 18:22:28,142 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 2.488) internal successors, (311), 126 states have internal predecessors, (311), 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 156 [2021-11-25 18:22:28,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:28,145 INFO L225 Difference]: With dead ends: 400 [2021-11-25 18:22:28,145 INFO L226 Difference]: Without dead ends: 399 [2021-11-25 18:22:28,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8844 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=9976, Invalid=27854, Unknown=0, NotChecked=0, Total=37830 [2021-11-25 18:22:28,150 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 744 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:28,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [744 Valid, 168 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:22:28,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-11-25 18:22:28,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 320. [2021-11-25 18:22:28,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 317 states have (on average 1.1577287066246056) internal successors, (367), 319 states have internal predecessors, (367), 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) [2021-11-25 18:22:28,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 367 transitions. [2021-11-25 18:22:28,163 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 367 transitions. Word has length 156 [2021-11-25 18:22:28,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:28,164 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 367 transitions. [2021-11-25 18:22:28,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 2.488) internal successors, (311), 126 states have internal predecessors, (311), 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) [2021-11-25 18:22:28,164 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 367 transitions. [2021-11-25 18:22:28,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-25 18:22:28,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:28,166 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1] [2021-11-25 18:22:28,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:28,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 18:22:28,379 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:22:28,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:28,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1626507930, now seen corresponding path program 5 times [2021-11-25 18:22:28,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:28,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582330232] [2021-11-25 18:22:28,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:28,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:29,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:29,610 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:29,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582330232] [2021-11-25 18:22:29,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582330232] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:29,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856480444] [2021-11-25 18:22:29,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:22:29,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:29,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:29,611 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:29,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 18:22:29,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2021-11-25 18:22:29,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:22:29,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-25 18:22:29,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:30,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:22:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:32,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856480444] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:22:32,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1329612383] [2021-11-25 18:22:32,974 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:22:32,975 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:22:32,975 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:22:32,975 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:22:32,975 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:22:33,124 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:22:33,628 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9492#(and (< 2147483647 (* 4 |ULTIMATE.start_main_~y~0#1|)) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~y~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 4 |ULTIMATE.start_main_~x~0#1|) (= |#NULL.base| 0))' at error location [2021-11-25 18:22:33,628 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:22:33,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:22:33,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 127 [2021-11-25 18:22:33,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391246283] [2021-11-25 18:22:33,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:22:33,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-11-25 18:22:33,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:33,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-11-25 18:22:33,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4181, Invalid=13909, Unknown=0, NotChecked=0, Total=18090 [2021-11-25 18:22:33,633 INFO L87 Difference]: Start difference. First operand 320 states and 367 transitions. Second operand has 128 states, 127 states have (on average 2.4960629921259843) internal successors, (317), 128 states have internal predecessors, (317), 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) [2021-11-25 18:22:36,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:36,208 INFO L93 Difference]: Finished difference Result 377 states and 408 transitions. [2021-11-25 18:22:36,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-11-25 18:22:36,209 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 127 states have (on average 2.4960629921259843) internal successors, (317), 128 states have internal predecessors, (317), 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 159 [2021-11-25 18:22:36,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:36,211 INFO L225 Difference]: With dead ends: 377 [2021-11-25 18:22:36,211 INFO L226 Difference]: Without dead ends: 344 [2021-11-25 18:22:36,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9021 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=10196, Invalid=28416, Unknown=0, NotChecked=0, Total=38612 [2021-11-25 18:22:36,215 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 857 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:36,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 200 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:22:36,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-25 18:22:36,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 322. [2021-11-25 18:22:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 319 states have (on average 1.0595611285266457) internal successors, (338), 321 states have internal predecessors, (338), 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) [2021-11-25 18:22:36,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 338 transitions. [2021-11-25 18:22:36,230 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 338 transitions. Word has length 159 [2021-11-25 18:22:36,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:36,231 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 338 transitions. [2021-11-25 18:22:36,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 127 states have (on average 2.4960629921259843) internal successors, (317), 128 states have internal predecessors, (317), 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) [2021-11-25 18:22:36,231 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 338 transitions. [2021-11-25 18:22:36,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-25 18:22:36,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:36,235 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1] [2021-11-25 18:22:36,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:36,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:36,462 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:22:36,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:36,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1405717409, now seen corresponding path program 5 times [2021-11-25 18:22:36,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:36,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335244975] [2021-11-25 18:22:36,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:36,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:37,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:37,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335244975] [2021-11-25 18:22:37,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335244975] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:37,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869619585] [2021-11-25 18:22:37,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:22:37,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:37,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:37,635 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:37,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 18:22:37,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-25 18:22:37,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:22:37,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-25 18:22:37,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:38,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:22:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:40,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869619585] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:22:40,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [246370987] [2021-11-25 18:22:40,858 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:22:40,858 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:22:40,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:22:40,858 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:22:40,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:22:41,010 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:22:41,351 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11944#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483643 |ULTIMATE.start_main_~x~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:22:41,351 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:22:41,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:22:41,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2021-11-25 18:22:41,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636690146] [2021-11-25 18:22:41,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:22:41,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-25 18:22:41,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:41,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-25 18:22:41,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4581, Invalid=5925, Unknown=0, NotChecked=0, Total=10506 [2021-11-25 18:22:41,354 INFO L87 Difference]: Start difference. First operand 322 states and 338 transitions. Second operand has 96 states, 95 states have (on average 4.91578947368421) internal successors, (467), 96 states have internal predecessors, (467), 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) [2021-11-25 18:22:41,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:41,795 INFO L93 Difference]: Finished difference Result 572 states and 619 transitions. [2021-11-25 18:22:41,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-25 18:22:41,796 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 4.91578947368421) internal successors, (467), 96 states have internal predecessors, (467), 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 234 [2021-11-25 18:22:41,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:41,799 INFO L225 Difference]: With dead ends: 572 [2021-11-25 18:22:41,799 INFO L226 Difference]: Without dead ends: 571 [2021-11-25 18:22:41,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 647 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4581, Invalid=5925, Unknown=0, NotChecked=0, Total=10506 [2021-11-25 18:22:41,800 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 431 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:41,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 357 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:22:41,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-25 18:22:41,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 478. [2021-11-25 18:22:41,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 475 states have (on average 1.1368421052631579) internal successors, (540), 477 states have internal predecessors, (540), 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) [2021-11-25 18:22:41,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 540 transitions. [2021-11-25 18:22:41,818 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 540 transitions. Word has length 234 [2021-11-25 18:22:41,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:41,819 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 540 transitions. [2021-11-25 18:22:41,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 4.91578947368421) internal successors, (467), 96 states have internal predecessors, (467), 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) [2021-11-25 18:22:41,820 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 540 transitions. [2021-11-25 18:22:41,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-11-25 18:22:41,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:41,825 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 62, 62, 1, 1, 1] [2021-11-25 18:22:41,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:42,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:42,050 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:22:42,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:42,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1067308769, now seen corresponding path program 5 times [2021-11-25 18:22:42,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:42,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716792078] [2021-11-25 18:22:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:42,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:46,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9703 backedges. 0 proven. 9703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:46,590 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:46,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716792078] [2021-11-25 18:22:46,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716792078] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:46,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397730738] [2021-11-25 18:22:46,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:22:46,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:46,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:46,592 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:46,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 18:22:46,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2021-11-25 18:22:46,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:22:46,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 127 conjunts are in the unsatisfiable core [2021-11-25 18:22:46,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:47,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9703 backedges. 0 proven. 9703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:47,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:22:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9703 backedges. 0 proven. 9703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:57,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397730738] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:22:57,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [983194769] [2021-11-25 18:22:57,965 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:22:57,965 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:22:57,966 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:22:57,966 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:22:57,966 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:22:58,106 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:22:58,786 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15335#(and (= |ULTIMATE.start_main_#t~post4#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 4 |ULTIMATE.start_main_~x~0#1|) (= |#NULL.base| 0))' at error location [2021-11-25 18:22:58,786 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:22:58,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:22:58,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127, 127] total 253 [2021-11-25 18:22:58,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120583379] [2021-11-25 18:22:58,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:22:58,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 254 states [2021-11-25 18:22:58,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:58,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 254 interpolants. [2021-11-25 18:22:58,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16278, Invalid=51582, Unknown=0, NotChecked=0, Total=67860 [2021-11-25 18:22:58,798 INFO L87 Difference]: Start difference. First operand 478 states and 540 transitions. Second operand has 254 states, 253 states have (on average 2.494071146245059) internal successors, (631), 254 states have internal predecessors, (631), 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) [2021-11-25 18:23:09,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:09,271 INFO L93 Difference]: Finished difference Result 800 states and 863 transitions. [2021-11-25 18:23:09,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2021-11-25 18:23:09,272 INFO L78 Accepts]: Start accepts. Automaton has has 254 states, 253 states have (on average 2.494071146245059) internal successors, (631), 254 states have internal predecessors, (631), 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 316 [2021-11-25 18:23:09,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:09,276 INFO L225 Difference]: With dead ends: 800 [2021-11-25 18:23:09,276 INFO L226 Difference]: Without dead ends: 799 [2021-11-25 18:23:09,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1199 GetRequests, 814 SyntacticMatches, 0 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34124 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=40408, Invalid=108974, Unknown=0, NotChecked=0, Total=149382 [2021-11-25 18:23:09,284 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 1734 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1734 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:09,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1734 Valid, 325 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 18:23:09,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-11-25 18:23:09,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 640. [2021-11-25 18:23:09,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 637 states have (on average 1.1538461538461537) internal successors, (735), 639 states have internal predecessors, (735), 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) [2021-11-25 18:23:09,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 735 transitions. [2021-11-25 18:23:09,303 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 735 transitions. Word has length 316 [2021-11-25 18:23:09,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:09,304 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 735 transitions. [2021-11-25 18:23:09,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 254 states, 253 states have (on average 2.494071146245059) internal successors, (631), 254 states have internal predecessors, (631), 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) [2021-11-25 18:23:09,305 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 735 transitions. [2021-11-25 18:23:09,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-11-25 18:23:09,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:09,310 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1, 1] [2021-11-25 18:23:09,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 18:23:09,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:09,526 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:23:09,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:09,526 INFO L85 PathProgramCache]: Analyzing trace with hash 552699238, now seen corresponding path program 6 times [2021-11-25 18:23:09,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:09,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434772601] [2021-11-25 18:23:09,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:09,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:14,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:23:14,004 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:14,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434772601] [2021-11-25 18:23:14,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434772601] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:23:14,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953710459] [2021-11-25 18:23:14,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:23:14,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:14,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:23:14,005 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:23:14,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 18:23:14,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:23:14,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:23:14,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 128 conjunts are in the unsatisfiable core [2021-11-25 18:23:14,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:23:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:23:14,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:23:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:23:25,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953710459] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:23:25,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1084832110] [2021-11-25 18:23:25,104 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:23:25,105 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:23:25,105 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:23:25,105 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:23:25,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:23:25,280 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:23:25,969 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19452#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (< 2147483647 (* 4 |ULTIMATE.start_main_~y~0#1|)) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~y~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:23:25,969 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:23:25,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:23:25,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128, 128] total 255 [2021-11-25 18:23:25,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333672389] [2021-11-25 18:23:25,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:23:25,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 256 states [2021-11-25 18:23:25,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:25,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 256 interpolants. [2021-11-25 18:23:25,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16534, Invalid=52372, Unknown=0, NotChecked=0, Total=68906 [2021-11-25 18:23:25,980 INFO L87 Difference]: Start difference. First operand 640 states and 735 transitions. Second operand has 256 states, 255 states have (on average 2.4980392156862745) internal successors, (637), 256 states have internal predecessors, (637), 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) [2021-11-25 18:23:36,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:36,311 INFO L93 Difference]: Finished difference Result 745 states and 808 transitions. [2021-11-25 18:23:36,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2021-11-25 18:23:36,314 INFO L78 Accepts]: Start accepts. Automaton has has 256 states, 255 states have (on average 2.4980392156862745) internal successors, (637), 256 states have internal predecessors, (637), 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 319 [2021-11-25 18:23:36,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:36,317 INFO L225 Difference]: With dead ends: 745 [2021-11-25 18:23:36,317 INFO L226 Difference]: Without dead ends: 680 [2021-11-25 18:23:36,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1209 GetRequests, 822 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34462 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=40853, Invalid=110079, Unknown=0, NotChecked=0, Total=150932 [2021-11-25 18:23:36,326 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1609 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1609 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:36,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1609 Valid, 325 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:23:36,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-11-25 18:23:36,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 642. [2021-11-25 18:23:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 639 states have (on average 1.054773082942097) internal successors, (674), 641 states have internal predecessors, (674), 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) [2021-11-25 18:23:36,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 674 transitions. [2021-11-25 18:23:36,346 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 674 transitions. Word has length 319 [2021-11-25 18:23:36,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:36,347 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 674 transitions. [2021-11-25 18:23:36,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 256 states, 255 states have (on average 2.4980392156862745) internal successors, (637), 256 states have internal predecessors, (637), 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) [2021-11-25 18:23:36,348 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 674 transitions. [2021-11-25 18:23:36,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-11-25 18:23:36,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:36,357 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 94, 94, 94, 1, 1, 1] [2021-11-25 18:23:36,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 18:23:36,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:36,578 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:23:36,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:36,578 INFO L85 PathProgramCache]: Analyzing trace with hash -2066129825, now seen corresponding path program 6 times [2021-11-25 18:23:36,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:36,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036445028] [2021-11-25 18:23:36,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:36,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:23:40,188 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:40,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036445028] [2021-11-25 18:23:40,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036445028] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:23:40,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437012595] [2021-11-25 18:23:40,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:23:40,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:40,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:23:40,194 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:23:40,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 18:23:40,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:23:40,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:23:40,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-25 18:23:40,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:23:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:23:41,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:23:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:23:50,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437012595] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:23:50,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [892411404] [2021-11-25 18:23:50,243 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:23:50,243 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:23:50,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:23:50,244 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:23:50,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:23:50,454 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:23:50,954 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24384#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483643 |ULTIMATE.start_main_~x~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:23:50,954 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:23:50,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:23:50,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2021-11-25 18:23:50,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333768671] [2021-11-25 18:23:50,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:23:50,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-11-25 18:23:50,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:50,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-11-25 18:23:50,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18357, Invalid=21045, Unknown=0, NotChecked=0, Total=39402 [2021-11-25 18:23:50,965 INFO L87 Difference]: Start difference. First operand 642 states and 674 transitions. Second operand has 192 states, 191 states have (on average 4.958115183246074) internal successors, (947), 192 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) [2021-11-25 18:23:52,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:52,804 INFO L93 Difference]: Finished difference Result 1148 states and 1243 transitions. [2021-11-25 18:23:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-25 18:23:52,805 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 191 states have (on average 4.958115183246074) internal successors, (947), 192 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 474 [2021-11-25 18:23:52,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:52,812 INFO L225 Difference]: With dead ends: 1148 [2021-11-25 18:23:52,812 INFO L226 Difference]: Without dead ends: 1147 [2021-11-25 18:23:52,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1516 GetRequests, 1319 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1985 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=18357, Invalid=21045, Unknown=0, NotChecked=0, Total=39402 [2021-11-25 18:23:52,816 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 1225 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:52,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1225 Valid, 713 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:23:52,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-11-25 18:23:52,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 958. [2021-11-25 18:23:52,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 955 states have (on average 1.1350785340314136) internal successors, (1084), 957 states have internal predecessors, (1084), 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) [2021-11-25 18:23:52,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 1084 transitions. [2021-11-25 18:23:52,863 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 1084 transitions. Word has length 474 [2021-11-25 18:23:52,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:52,865 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 1084 transitions. [2021-11-25 18:23:52,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 191 states have (on average 4.958115183246074) internal successors, (947), 192 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) [2021-11-25 18:23:52,866 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 1084 transitions. [2021-11-25 18:23:52,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2021-11-25 18:23:52,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:52,874 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 126, 126, 1, 1, 1] [2021-11-25 18:23:52,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-25 18:23:53,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-25 18:23:53,094 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:23:53,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:53,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2054572319, now seen corresponding path program 6 times [2021-11-25 18:23:53,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:53,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853748074] [2021-11-25 18:23:53,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:53,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:53,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 39879 backedges. 0 proven. 39879 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:09,496 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:09,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853748074] [2021-11-25 18:24:09,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853748074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:24:09,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520207064] [2021-11-25 18:24:09,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:24:09,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:09,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:24:09,497 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:24:09,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 18:24:09,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:24:09,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:24:09,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 1423 conjuncts, 255 conjunts are in the unsatisfiable core [2021-11-25 18:24:09,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:24:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 39879 backedges. 0 proven. 39879 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:11,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:24:52,116 INFO L134 CoverageAnalysis]: Checked inductivity of 39879 backedges. 0 proven. 39879 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:24:52,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520207064] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:24:52,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [507929576] [2021-11-25 18:24:52,118 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:24:52,118 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:24:52,118 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:24:52,118 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:24:52,119 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:24:52,260 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:24:53,409 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31199#(and (= |ULTIMATE.start_main_#t~post4#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 4 |ULTIMATE.start_main_~x~0#1|) (= |#NULL.base| 0))' at error location [2021-11-25 18:24:53,409 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:24:53,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:24:53,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [255, 255, 255] total 509 [2021-11-25 18:24:53,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020905732] [2021-11-25 18:24:53,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:24:53,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 510 states [2021-11-25 18:24:53,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:24:53,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 510 interpolants. [2021-11-25 18:24:53,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65302, Invalid=201470, Unknown=0, NotChecked=0, Total=266772 [2021-11-25 18:24:53,449 INFO L87 Difference]: Start difference. First operand 958 states and 1084 transitions. Second operand has 510 states, 509 states have (on average 2.4970530451866404) internal successors, (1271), 510 states have internal predecessors, (1271), 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) [2021-11-25 18:25:54,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:25:54,275 INFO L93 Difference]: Finished difference Result 1600 states and 1727 transitions. [2021-11-25 18:25:54,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 511 states. [2021-11-25 18:25:54,277 INFO L78 Accepts]: Start accepts. Automaton has has 510 states, 509 states have (on average 2.4970530451866404) internal successors, (1271), 510 states have internal predecessors, (1271), 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 636 [2021-11-25 18:25:54,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:25:54,287 INFO L225 Difference]: With dead ends: 1600 [2021-11-25 18:25:54,287 INFO L226 Difference]: Without dead ends: 1599 [2021-11-25 18:25:54,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2415 GetRequests, 1646 SyntacticMatches, 0 SemanticMatches, 769 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133836 ImplicationChecksByTransitivity, 85.0s TimeCoverageRelationStatistics Valid=162712, Invalid=430958, Unknown=0, NotChecked=0, Total=593670 [2021-11-25 18:25:54,318 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 4160 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4160 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:25:54,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4160 Valid, 615 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1570 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-25 18:25:54,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-11-25 18:25:54,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1280. [2021-11-25 18:25:54,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1277 states have (on average 1.1519185591229444) internal successors, (1471), 1279 states have internal predecessors, (1471), 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) [2021-11-25 18:25:54,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 1471 transitions. [2021-11-25 18:25:54,355 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 1471 transitions. Word has length 636 [2021-11-25 18:25:54,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:25:54,356 INFO L470 AbstractCegarLoop]: Abstraction has 1280 states and 1471 transitions. [2021-11-25 18:25:54,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 510 states, 509 states have (on average 2.4970530451866404) internal successors, (1271), 510 states have internal predecessors, (1271), 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) [2021-11-25 18:25:54,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 1471 transitions. [2021-11-25 18:25:54,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2021-11-25 18:25:54,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:25:54,362 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 127, 127, 1, 1, 1, 1] [2021-11-25 18:25:54,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-25 18:25:54,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-25 18:25:54,590 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:25:54,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:25:54,590 INFO L85 PathProgramCache]: Analyzing trace with hash -184965786, now seen corresponding path program 7 times [2021-11-25 18:25:54,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:25:54,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383054360] [2021-11-25 18:25:54,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:25:54,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:25:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:11,442 INFO L134 CoverageAnalysis]: Checked inductivity of 40132 backedges. 0 proven. 40132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:26:11,443 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:11,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383054360] [2021-11-25 18:26:11,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383054360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:26:11,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114261951] [2021-11-25 18:26:11,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:26:11,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:26:11,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:26:11,444 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:26:11,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-25 18:26:11,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:11,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 1429 conjuncts, 256 conjunts are in the unsatisfiable core [2021-11-25 18:26:11,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:26:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 40132 backedges. 0 proven. 40132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:26:12,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:26:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 40132 backedges. 0 proven. 40132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:26:54,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114261951] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:26:54,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1943171589] [2021-11-25 18:26:54,532 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:26:54,532 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:26:54,532 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:26:54,532 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:26:54,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:26:54,672 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:26:56,024 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39444#(and (< 2147483647 (* 4 |ULTIMATE.start_main_~y~0#1|)) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~y~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 4 |ULTIMATE.start_main_~x~0#1|) (= |#NULL.base| 0))' at error location [2021-11-25 18:26:56,024 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:26:56,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:26:56,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [256, 256, 256] total 511 [2021-11-25 18:26:56,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997791262] [2021-11-25 18:26:56,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:26:56,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 512 states [2021-11-25 18:26:56,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:56,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 512 interpolants. [2021-11-25 18:26:56,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65813, Invalid=203029, Unknown=0, NotChecked=0, Total=268842 [2021-11-25 18:26:56,050 INFO L87 Difference]: Start difference. First operand 1280 states and 1471 transitions. Second operand has 512 states, 511 states have (on average 2.4990215264187867) internal successors, (1277), 512 states have internal predecessors, (1277), 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) [2021-11-25 18:27:56,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:27:56,575 INFO L93 Difference]: Finished difference Result 1481 states and 1608 transitions. [2021-11-25 18:27:56,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 511 states. [2021-11-25 18:27:56,576 INFO L78 Accepts]: Start accepts. Automaton has has 512 states, 511 states have (on average 2.4990215264187867) internal successors, (1277), 512 states have internal predecessors, (1277), 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 639 [2021-11-25 18:27:56,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:27:56,584 INFO L225 Difference]: With dead ends: 1481 [2021-11-25 18:27:56,584 INFO L226 Difference]: Without dead ends: 1352 [2021-11-25 18:27:56,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2425 GetRequests, 1654 SyntacticMatches, 0 SemanticMatches, 771 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134493 ImplicationChecksByTransitivity, 85.2s TimeCoverageRelationStatistics Valid=163604, Invalid=433152, Unknown=0, NotChecked=0, Total=596756 [2021-11-25 18:27:56,613 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 4113 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4113 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:27:56,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4113 Valid, 648 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1464 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 18:27:56,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-11-25 18:27:56,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1282. [2021-11-25 18:27:56,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1279 states have (on average 1.0523846755277562) internal successors, (1346), 1281 states have internal predecessors, (1346), 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) [2021-11-25 18:27:56,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1346 transitions. [2021-11-25 18:27:56,647 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1346 transitions. Word has length 639 [2021-11-25 18:27:56,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:27:56,648 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 1346 transitions. [2021-11-25 18:27:56,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 512 states, 511 states have (on average 2.4990215264187867) internal successors, (1277), 512 states have internal predecessors, (1277), 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) [2021-11-25 18:27:56,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1346 transitions. [2021-11-25 18:27:56,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2021-11-25 18:27:56,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:27:56,658 INFO L514 BasicCegarLoop]: trace histogram [191, 190, 190, 190, 190, 1, 1, 1] [2021-11-25 18:27:56,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-25 18:27:56,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-25 18:27:56,874 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:27:56,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:27:56,874 INFO L85 PathProgramCache]: Analyzing trace with hash -410047393, now seen corresponding path program 7 times [2021-11-25 18:27:56,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:27:56,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007295486] [2021-11-25 18:27:56,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:56,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:27:57,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:28:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:28:09,497 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:28:09,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007295486] [2021-11-25 18:28:09,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007295486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:28:09,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534481083] [2021-11-25 18:28:09,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:28:09,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:28:09,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:28:09,499 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:28:09,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-25 18:28:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:28:09,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 2121 conjuncts, 193 conjunts are in the unsatisfiable core [2021-11-25 18:28:09,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:28:11,516 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:28:11,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:28:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:28:46,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534481083] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:28:46,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [705449118] [2021-11-25 18:28:46,539 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:28:46,539 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:28:46,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:28:46,539 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:28:46,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:28:46,639 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:28:47,451 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '49336#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483643 |ULTIMATE.start_main_~x~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:28:47,451 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:28:47,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:28:47,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 383 [2021-11-25 18:28:47,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415252073] [2021-11-25 18:28:47,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:28:47,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2021-11-25 18:28:47,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:28:47,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2021-11-25 18:28:47,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73557, Invalid=78933, Unknown=0, NotChecked=0, Total=152490 [2021-11-25 18:28:47,471 INFO L87 Difference]: Start difference. First operand 1282 states and 1346 transitions. Second operand has 384 states, 383 states have (on average 4.97911227154047) internal successors, (1907), 384 states have internal predecessors, (1907), 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) [2021-11-25 18:28:58,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:28:58,607 INFO L93 Difference]: Finished difference Result 2300 states and 2491 transitions. [2021-11-25 18:28:58,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-25 18:28:58,608 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 383 states have (on average 4.97911227154047) internal successors, (1907), 384 states have internal predecessors, (1907), 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 954 [2021-11-25 18:28:58,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:28:58,620 INFO L225 Difference]: With dead ends: 2300 [2021-11-25 18:28:58,621 INFO L226 Difference]: Without dead ends: 2299 [2021-11-25 18:28:58,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3052 GetRequests, 2663 SyntacticMatches, 0 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4001 ImplicationChecksByTransitivity, 45.6s TimeCoverageRelationStatistics Valid=73557, Invalid=78933, Unknown=0, NotChecked=0, Total=152490 [2021-11-25 18:28:58,631 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 2117 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2117 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:28:58,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2117 Valid, 1423 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 18:28:58,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2299 states. [2021-11-25 18:28:58,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2299 to 1918. [2021-11-25 18:28:58,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1915 states have (on average 1.1342036553524804) internal successors, (2172), 1917 states have internal predecessors, (2172), 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) [2021-11-25 18:28:58,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2172 transitions. [2021-11-25 18:28:58,680 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2172 transitions. Word has length 954 [2021-11-25 18:28:58,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:28:58,682 INFO L470 AbstractCegarLoop]: Abstraction has 1918 states and 2172 transitions. [2021-11-25 18:28:58,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 383 states have (on average 4.97911227154047) internal successors, (1907), 384 states have internal predecessors, (1907), 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) [2021-11-25 18:28:58,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2172 transitions. [2021-11-25 18:28:58,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1277 [2021-11-25 18:28:58,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:28:58,697 INFO L514 BasicCegarLoop]: trace histogram [255, 255, 255, 254, 254, 1, 1, 1] [2021-11-25 18:28:58,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-25 18:28:58,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:28:58,914 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:28:58,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:28:58,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1885435617, now seen corresponding path program 7 times [2021-11-25 18:28:58,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:28:58,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347680724] [2021-11-25 18:28:58,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:28:58,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:29:00,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 161671 backedges. 0 proven. 161671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:30:01,331 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:01,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347680724] [2021-11-25 18:30:01,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347680724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:30:01,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108472085] [2021-11-25 18:30:01,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:30:01,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:30:01,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:30:01,333 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:30:01,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162c3572-24d8-4aa3-bbc4-0620eaca019a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-25 18:30:01,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:01,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 2831 conjuncts, 511 conjunts are in the unsatisfiable core [2021-11-25 18:30:01,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:30:04,055 INFO L134 CoverageAnalysis]: Checked inductivity of 161671 backedges. 0 proven. 161671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:30:04,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:32:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 161671 backedges. 0 proven. 161671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:32:47,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108472085] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:32:47,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1718711925] [2021-11-25 18:32:47,564 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:32:47,564 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:32:47,564 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:32:47,565 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:32:47,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs