./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark20_conjunctive.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark20_conjunctive.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P --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 a97cc7ecf3f325d6a4f94ad142da468f60264f8646a5f445527873ff4eb9457a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:25:22,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:25:22,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:25:22,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:25:22,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:25:22,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:25:22,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:25:23,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:25:23,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:25:23,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:25:23,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:25:23,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:25:23,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:25:23,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:25:23,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:25:23,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:25:23,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:25:23,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:25:23,029 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:25:23,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:25:23,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:25:23,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:25:23,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:25:23,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:25:23,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:25:23,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:25:23,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:25:23,057 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:25:23,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:25:23,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:25:23,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:25:23,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:25:23,063 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:25:23,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:25:23,066 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:25:23,066 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:25:23,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:25:23,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:25:23,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:25:23,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:25:23,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:25:23,070 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-32bit-Taipan_Default.epf [2021-11-21 00:25:23,108 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:25:23,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:25:23,108 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:25:23,109 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:25:23,109 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:25:23,109 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:25:23,110 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:25:23,110 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:25:23,110 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:25:23,110 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:25:23,110 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:25:23,111 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:25:23,111 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:25:23,111 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:25:23,111 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:25:23,111 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:25:23,112 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:25:23,112 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:25:23,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:25:23,113 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:25:23,113 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 00:25:23,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:25:23,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:25:23,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:25:23,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:25:23,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:25:23,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:25:23,114 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-21 00:25:23,114 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:25:23,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:25:23,115 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:25:23,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:25:23,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:25:23,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:25:23,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:25:23,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:25:23,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:25:23,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:25:23,116 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:25:23,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:25:23,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:25:23,117 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:25:23,117 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:25:23,117 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_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a97cc7ecf3f325d6a4f94ad142da468f60264f8646a5f445527873ff4eb9457a [2021-11-21 00:25:23,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:25:23,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:25:23,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:25:23,448 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:25:23,449 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:25:23,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/loop-zilu/benchmark20_conjunctive.i [2021-11-21 00:25:23,535 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/data/22c86395d/1845fcb9a4f642e18fd8ec21aaee3d26/FLAG33c68ff3a [2021-11-21 00:25:23,985 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:25:23,986 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/sv-benchmarks/c/loop-zilu/benchmark20_conjunctive.i [2021-11-21 00:25:23,997 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/data/22c86395d/1845fcb9a4f642e18fd8ec21aaee3d26/FLAG33c68ff3a [2021-11-21 00:25:24,363 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/data/22c86395d/1845fcb9a4f642e18fd8ec21aaee3d26 [2021-11-21 00:25:24,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:25:24,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:25:24,383 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:25:24,383 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:25:24,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:25:24,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:25:24" (1/1) ... [2021-11-21 00:25:24,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8cb9fa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:25:24, skipping insertion in model container [2021-11-21 00:25:24,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:25:24" (1/1) ... [2021-11-21 00:25:24,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:25:24,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:25:24,581 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_165fd4ae-d493-4401-8016-f389eb3071f4/sv-benchmarks/c/loop-zilu/benchmark20_conjunctive.i[873,886] [2021-11-21 00:25:24,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:25:24,596 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:25:24,607 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_165fd4ae-d493-4401-8016-f389eb3071f4/sv-benchmarks/c/loop-zilu/benchmark20_conjunctive.i[873,886] [2021-11-21 00:25:24,610 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:25:24,624 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:25:24,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:25:24 WrapperNode [2021-11-21 00:25:24,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:25:24,625 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:25:24,626 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:25:24,626 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:25:24,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:25:24" (1/1) ... [2021-11-21 00:25:24,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:25:24" (1/1) ... [2021-11-21 00:25:24,660 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 39 [2021-11-21 00:25:24,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:25:24,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:25:24,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:25:24,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:25:24,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:25:24" (1/1) ... [2021-11-21 00:25:24,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:25:24" (1/1) ... [2021-11-21 00:25:24,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:25:24" (1/1) ... [2021-11-21 00:25:24,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:25:24" (1/1) ... [2021-11-21 00:25:24,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:25:24" (1/1) ... [2021-11-21 00:25:24,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:25:24" (1/1) ... [2021-11-21 00:25:24,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:25:24" (1/1) ... [2021-11-21 00:25:24,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:25:24,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:25:24,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:25:24,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:25:24,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:25:24" (1/1) ... [2021-11-21 00:25:24,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:25:24,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:25:24,719 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:25:24,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:25:24,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:25:24,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:25:24,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:25:24,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:25:24,842 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:25:24,843 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:25:25,007 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:25:25,040 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:25:25,040 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 00:25:25,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:25:25 BoogieIcfgContainer [2021-11-21 00:25:25,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:25:25,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:25:25,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:25:25,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:25:25,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:25:24" (1/3) ... [2021-11-21 00:25:25,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d104d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:25:25, skipping insertion in model container [2021-11-21 00:25:25,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:25:24" (2/3) ... [2021-11-21 00:25:25,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d104d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:25:25, skipping insertion in model container [2021-11-21 00:25:25,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:25:25" (3/3) ... [2021-11-21 00:25:25,070 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark20_conjunctive.i [2021-11-21 00:25:25,076 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:25:25,076 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-21 00:25:25,162 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:25:25,183 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 [2021-11-21 00:25:25,183 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-21 00:25:25,216 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 8 states have (on average 1.75) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:25:25,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 00:25:25,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:25:25,224 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 00:25:25,225 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:25:25,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:25:25,239 INFO L85 PathProgramCache]: Analyzing trace with hash 2092610, now seen corresponding path program 1 times [2021-11-21 00:25:25,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:25:25,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127580188] [2021-11-21 00:25:25,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:25:25,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:25:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:25:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:25:25,424 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:25:25,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127580188] [2021-11-21 00:25:25,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127580188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:25:25,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:25:25,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:25:25,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753860074] [2021-11-21 00:25:25,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:25:25,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:25:25,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:25:25,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:25:25,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:25:25,468 INFO L87 Difference]: Start difference. First operand has 13 states, 8 states have (on average 1.75) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2021-11-21 00:25:25,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:25:25,520 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-11-21 00:25:25,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:25:25,523 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 [2021-11-21 00:25:25,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:25:25,532 INFO L225 Difference]: With dead ends: 19 [2021-11-21 00:25:25,532 INFO L226 Difference]: Without dead ends: 14 [2021-11-21 00:25:25,535 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 [2021-11-21 00:25:25,540 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:25:25,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:25:25,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-21 00:25:25,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-11-21 00:25:25,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 12 states have internal predecessors, (13), 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) [2021-11-21 00:25:25,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-11-21 00:25:25,577 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 4 [2021-11-21 00:25:25,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:25:25,577 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-11-21 00:25:25,577 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) [2021-11-21 00:25:25,578 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-11-21 00:25:25,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 00:25:25,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:25:25,578 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 00:25:25,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:25:25,579 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:25:25,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:25:25,581 INFO L85 PathProgramCache]: Analyzing trace with hash 64870960, now seen corresponding path program 1 times [2021-11-21 00:25:25,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:25:25,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533645449] [2021-11-21 00:25:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:25:25,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:25:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:25:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:25:25,623 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:25:25,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533645449] [2021-11-21 00:25:25,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533645449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:25:25,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:25:25,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:25:25,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078646540] [2021-11-21 00:25:25,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:25:25,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:25:25,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:25:25,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:25:25,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:25:25,628 INFO L87 Difference]: Start difference. First operand 13 states and 13 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) [2021-11-21 00:25:25,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:25:25,647 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-11-21 00:25:25,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:25:25,648 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 [2021-11-21 00:25:25,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:25:25,649 INFO L225 Difference]: With dead ends: 15 [2021-11-21 00:25:25,649 INFO L226 Difference]: Without dead ends: 14 [2021-11-21 00:25:25,650 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 [2021-11-21 00:25:25,652 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 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 [2021-11-21 00:25:25,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:25:25,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-21 00:25:25,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-21 00:25:25,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.4) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:25:25,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-11-21 00:25:25,658 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 5 [2021-11-21 00:25:25,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:25:25,658 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-11-21 00:25:25,658 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) [2021-11-21 00:25:25,659 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-11-21 00:25:25,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:25:25,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:25:25,660 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:25:25,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:25:25,660 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:25:25,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:25:25,661 INFO L85 PathProgramCache]: Analyzing trace with hash 2010999812, now seen corresponding path program 1 times [2021-11-21 00:25:25,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:25:25,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963443046] [2021-11-21 00:25:25,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:25:25,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:25:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:25:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:25:25,709 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:25:25,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963443046] [2021-11-21 00:25:25,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963443046] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:25:25,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:25:25,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:25:25,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537437181] [2021-11-21 00:25:25,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:25:25,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:25:25,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:25:25,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:25:25,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:25:25,713 INFO L87 Difference]: Start difference. First operand 14 states and 14 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) [2021-11-21 00:25:25,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:25:25,751 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-11-21 00:25:25,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:25:25,752 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 [2021-11-21 00:25:25,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:25:25,753 INFO L225 Difference]: With dead ends: 18 [2021-11-21 00:25:25,753 INFO L226 Difference]: Without dead ends: 17 [2021-11-21 00:25:25,754 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 [2021-11-21 00:25:25,756 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:25:25,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:25:25,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-21 00:25:25,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2021-11-21 00:25:25,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.3636363636363635) 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) [2021-11-21 00:25:25,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-21 00:25:25,762 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 6 [2021-11-21 00:25:25,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:25:25,763 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-21 00:25:25,763 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) [2021-11-21 00:25:25,763 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-21 00:25:25,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 00:25:25,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:25:25,764 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:25:25,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:25:25,765 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:25:25,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:25:25,766 INFO L85 PathProgramCache]: Analyzing trace with hash -2083515214, now seen corresponding path program 1 times [2021-11-21 00:25:25,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:25:25,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116849668] [2021-11-21 00:25:25,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:25:25,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:25:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:25:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:25:25,814 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:25:25,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116849668] [2021-11-21 00:25:25,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116849668] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:25:25,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:25:25,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:25:25,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031441313] [2021-11-21 00:25:25,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:25:25,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:25:25,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:25:25,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:25:25,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:25:25,818 INFO L87 Difference]: Start difference. First operand 15 states and 15 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) [2021-11-21 00:25:25,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:25:25,847 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-11-21 00:25:25,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:25:25,848 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 [2021-11-21 00:25:25,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:25:25,848 INFO L225 Difference]: With dead ends: 15 [2021-11-21 00:25:25,849 INFO L226 Difference]: Without dead ends: 14 [2021-11-21 00:25:25,849 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 [2021-11-21 00:25:25,851 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 6 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:25:25,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:25:25,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-21 00:25:25,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-21 00:25:25,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:25:25,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-11-21 00:25:25,858 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 7 [2021-11-21 00:25:25,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:25:25,858 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-11-21 00:25:25,858 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) [2021-11-21 00:25:25,859 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-11-21 00:25:25,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 00:25:25,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:25:25,860 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:25:25,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:25:25,860 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:25:25,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:25:25,861 INFO L85 PathProgramCache]: Analyzing trace with hash -803359244, now seen corresponding path program 1 times [2021-11-21 00:25:25,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:25:25,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451745846] [2021-11-21 00:25:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:25:25,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:25:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:25:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:25:25,988 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:25:25,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451745846] [2021-11-21 00:25:25,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451745846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:25:25,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185489799] [2021-11-21 00:25:25,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:25:25,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:25:25,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:25:25,992 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:25:26,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:25:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:25:26,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:25:26,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:25:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:25:26,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:25:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:25:26,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185489799] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:25:26,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1463604437] [2021-11-21 00:25:26,351 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 00:25:26,351 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:25:26,358 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:25:26,365 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:25:26,369 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:25:28,066 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:25:28,385 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:25:28,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:25:28,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2021-11-21 00:25:28,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902637813] [2021-11-21 00:25:28,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:25:28,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 00:25:28,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:25:28,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 00:25:28,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:25:28,388 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:25:28,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:25:28,491 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-11-21 00:25:28,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:25:28,492 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-21 00:25:28,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:25:28,493 INFO L225 Difference]: With dead ends: 25 [2021-11-21 00:25:28,493 INFO L226 Difference]: Without dead ends: 24 [2021-11-21 00:25:28,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-11-21 00:25:28,496 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:25:28,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 6 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:25:28,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-21 00:25:28,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-11-21 00:25:28,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:25:28,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-21 00:25:28,502 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 9 [2021-11-21 00:25:28,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:25:28,503 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-21 00:25:28,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:25:28,503 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-21 00:25:28,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 00:25:28,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:25:28,504 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 00:25:28,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:25:28,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:25:28,736 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:25:28,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:25:28,736 INFO L85 PathProgramCache]: Analyzing trace with hash 865667262, now seen corresponding path program 1 times [2021-11-21 00:25:28,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:25:28,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965986794] [2021-11-21 00:25:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:25:28,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:25:28,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:25:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:25:28,803 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:25:28,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965986794] [2021-11-21 00:25:28,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965986794] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:25:28,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636354265] [2021-11-21 00:25:28,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:25:28,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:25:28,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:25:28,806 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:25:28,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:25:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:25:28,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:25:28,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:25:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:25:28,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:25:28,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636354265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:25:28,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:25:28,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-11-21 00:25:28,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023214231] [2021-11-21 00:25:28,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:25:28,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:25:28,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:25:28,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:25:28,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:25:28,928 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-11-21 00:25:28,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:25:28,971 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-11-21 00:25:28,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:25:28,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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 10 [2021-11-21 00:25:28,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:25:28,973 INFO L225 Difference]: With dead ends: 22 [2021-11-21 00:25:28,974 INFO L226 Difference]: Without dead ends: 21 [2021-11-21 00:25:28,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:25:28,979 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:25:28,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 1 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:25:28,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-21 00:25:28,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-21 00:25:28,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 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) [2021-11-21 00:25:28,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-11-21 00:25:28,990 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 10 [2021-11-21 00:25:28,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:25:28,990 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-11-21 00:25:28,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-11-21 00:25:28,991 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-11-21 00:25:28,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 00:25:28,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:25:28,992 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2021-11-21 00:25:29,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:25:29,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:25:29,220 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:25:29,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:25:29,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1065881398, now seen corresponding path program 1 times [2021-11-21 00:25:29,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:25:29,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620665657] [2021-11-21 00:25:29,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:25:29,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:25:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:25:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:25:29,265 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:25:29,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620665657] [2021-11-21 00:25:29,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620665657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:25:29,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389320355] [2021-11-21 00:25:29,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:25:29,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:25:29,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:25:29,267 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:25:29,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:25:29,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:25:29,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:25:29,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:25:29,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:25:29,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:25:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:25:29,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389320355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:25:29,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [756463433] [2021-11-21 00:25:29,398 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 00:25:29,400 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:25:29,400 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:25:29,400 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:25:29,401 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:25:30,653 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:25:31,192 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:25:31,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:25:31,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-21 00:25:31,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819958404] [2021-11-21 00:25:31,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:25:31,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:25:31,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:25:31,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:25:31,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:25:31,194 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 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) [2021-11-21 00:25:31,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:25:31,290 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-11-21 00:25:31,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:25:31,296 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 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 11 [2021-11-21 00:25:31,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:25:31,297 INFO L225 Difference]: With dead ends: 31 [2021-11-21 00:25:31,297 INFO L226 Difference]: Without dead ends: 30 [2021-11-21 00:25:31,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-11-21 00:25:31,298 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 9 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 [2021-11-21 00:25:31,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 9 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:25:31,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-21 00:25:31,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-11-21 00:25:31,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 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) [2021-11-21 00:25:31,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-11-21 00:25:31,304 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 11 [2021-11-21 00:25:31,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:25:31,304 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-11-21 00:25:31,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 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) [2021-11-21 00:25:31,304 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-11-21 00:25:31,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 00:25:31,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:25:31,305 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1] [2021-11-21 00:25:31,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:25:31,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 00:25:31,506 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:25:31,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:25:31,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1075330740, now seen corresponding path program 2 times [2021-11-21 00:25:31,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:25:31,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587089276] [2021-11-21 00:25:31,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:25:31,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:25:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:25:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:25:31,598 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:25:31,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587089276] [2021-11-21 00:25:31,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587089276] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:25:31,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127438608] [2021-11-21 00:25:31,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:25:31,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:25:31,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:25:31,604 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:25:31,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:25:31,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 00:25:31,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:25:31,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 00:25:31,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:25:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:25:31,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:25:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:25:32,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127438608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:25:32,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1259908211] [2021-11-21 00:25:32,092 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 00:25:32,092 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:25:32,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:25:32,093 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:25:32,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:25:33,238 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:25:33,868 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:25:33,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:25:33,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2021-11-21 00:25:33,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295167751] [2021-11-21 00:25:33,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:25:33,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-21 00:25:33,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:25:33,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-21 00:25:33,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-11-21 00:25:33,871 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 23 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 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) [2021-11-21 00:25:34,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:25:34,390 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-11-21 00:25:34,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-21 00:25:34,391 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 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 [2021-11-21 00:25:34,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:25:34,392 INFO L225 Difference]: With dead ends: 44 [2021-11-21 00:25:34,392 INFO L226 Difference]: Without dead ends: 43 [2021-11-21 00:25:34,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=315, Invalid=1665, Unknown=0, NotChecked=0, Total=1980 [2021-11-21 00:25:34,394 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:25:34,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 2 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:25:34,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-21 00:25:34,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-11-21 00:25:34,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 40 states have internal predecessors, (43), 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) [2021-11-21 00:25:34,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-11-21 00:25:34,401 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 19 [2021-11-21 00:25:34,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:25:34,401 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-11-21 00:25:34,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 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) [2021-11-21 00:25:34,401 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-11-21 00:25:34,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 00:25:34,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:25:34,402 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1] [2021-11-21 00:25:34,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:25:34,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-21 00:25:34,603 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:25:34,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:25:34,603 INFO L85 PathProgramCache]: Analyzing trace with hash 953924228, now seen corresponding path program 2 times [2021-11-21 00:25:34,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:25:34,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496639644] [2021-11-21 00:25:34,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:25:34,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:25:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:25:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:25:34,717 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:25:34,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496639644] [2021-11-21 00:25:34,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496639644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:25:34,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527114852] [2021-11-21 00:25:34,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:25:34,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:25:34,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:25:34,727 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:25:34,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:25:34,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-21 00:25:34,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:25:34,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:25:34,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:25:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-21 00:25:34,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:25:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-21 00:25:34,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527114852] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:25:34,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [181838583] [2021-11-21 00:25:34,951 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 00:25:34,951 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:25:34,951 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:25:34,951 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:25:34,952 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:25:36,085 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:25:36,577 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:25:36,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:25:36,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4, 4] total 17 [2021-11-21 00:25:36,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457804334] [2021-11-21 00:25:36,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:25:36,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 00:25:36,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:25:36,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 00:25:36,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-11-21 00:25:36,580 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 18 states have internal predecessors, (46), 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) [2021-11-21 00:25:36,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:25:36,800 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-11-21 00:25:36,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 00:25:36,800 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 18 states have internal predecessors, (46), 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 26 [2021-11-21 00:25:36,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:25:36,801 INFO L225 Difference]: With dead ends: 41 [2021-11-21 00:25:36,801 INFO L226 Difference]: Without dead ends: 40 [2021-11-21 00:25:36,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=314, Invalid=1092, Unknown=0, NotChecked=0, Total=1406 [2021-11-21 00:25:36,805 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 50 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:25:36,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 0 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:25:36,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-21 00:25:36,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-21 00:25:36,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 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) [2021-11-21 00:25:36,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-11-21 00:25:36,811 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 26 [2021-11-21 00:25:36,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:25:36,812 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-11-21 00:25:36,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 18 states have internal predecessors, (46), 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) [2021-11-21 00:25:36,812 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-11-21 00:25:36,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 00:25:36,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:25:36,813 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1] [2021-11-21 00:25:36,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-21 00:25:37,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:25:37,028 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:25:37,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:25:37,028 INFO L85 PathProgramCache]: Analyzing trace with hash 237862964, now seen corresponding path program 3 times [2021-11-21 00:25:37,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:25:37,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123822138] [2021-11-21 00:25:37,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:25:37,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:25:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:25:37,262 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:25:37,262 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:25:37,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123822138] [2021-11-21 00:25:37,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123822138] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:25:37,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55214574] [2021-11-21 00:25:37,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:25:37,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:25:37,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:25:37,264 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:25:37,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:25:37,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:25:37,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:25:37,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 00:25:37,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:25:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:25:37,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:26:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 113 refuted. 6 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:26:34,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55214574] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:26:34,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [619844283] [2021-11-21 00:26:34,199 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 00:26:34,199 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:26:34,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:26:34,200 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:26:34,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:26:35,341 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:26:36,132 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:26:36,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:26:36,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2021-11-21 00:26:36,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039699943] [2021-11-21 00:26:36,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:26:36,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-21 00:26:36,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:26:36,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-21 00:26:36,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=2558, Unknown=21, NotChecked=0, Total=2862 [2021-11-21 00:26:36,137 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 47 states, 46 states have (on average 2.5) internal successors, (115), 47 states have internal predecessors, (115), 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) [2021-11-21 00:27:25,579 WARN L227 SmtUtils]: Spent 16.92s on a formula simplification. DAG size of input: 143 DAG size of output: 137 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:27:34,174 WARN L227 SmtUtils]: Spent 8.25s on a formula simplification. DAG size of input: 124 DAG size of output: 114 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:28:31,906 WARN L227 SmtUtils]: Spent 14.60s on a formula simplification. DAG size of input: 106 DAG size of output: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:29:25,677 WARN L227 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 43 DAG size of output: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:29:26,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:29:26,250 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-11-21 00:29:26,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-21 00:29:26,250 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.5) internal successors, (115), 47 states have internal predecessors, (115), 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 [2021-11-21 00:29:26,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:29:26,252 INFO L225 Difference]: With dead ends: 81 [2021-11-21 00:29:26,252 INFO L226 Difference]: Without dead ends: 80 [2021-11-21 00:29:26,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 219.2s TimeCoverageRelationStatistics Valid=817, Invalid=5605, Unknown=58, NotChecked=0, Total=6480 [2021-11-21 00:29:26,258 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:29:26,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 2 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 662 Invalid, 0 Unknown, 194 Unchecked, 0.4s Time] [2021-11-21 00:29:26,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-21 00:29:26,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-21 00:29:26,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 79 states have internal predecessors, (80), 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) [2021-11-21 00:29:26,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2021-11-21 00:29:26,269 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 39 [2021-11-21 00:29:26,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:29:26,269 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2021-11-21 00:29:26,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.5) internal successors, (115), 47 states have internal predecessors, (115), 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) [2021-11-21 00:29:26,270 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2021-11-21 00:29:26,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-21 00:29:26,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:29:26,273 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1] [2021-11-21 00:29:26,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-21 00:29:26,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 00:29:26,496 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 00:29:26,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:29:26,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1923662644, now seen corresponding path program 4 times [2021-11-21 00:29:26,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:29:26,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345129406] [2021-11-21 00:29:26,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:29:26,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:29:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:29:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:29:27,299 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:29:27,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345129406] [2021-11-21 00:29:27,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345129406] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:29:27,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288199691] [2021-11-21 00:29:27,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:29:27,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:29:27,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:29:27,302 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:29:27,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165fd4ae-d493-4401-8016-f389eb3071f4/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:29:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:29:27,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-21 00:29:27,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:29:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:29:29,318 INFO L328 TraceCheckSpWp]: Computing backward predicates...