./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark41_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_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/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_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark41_conjunctive.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/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_a736cb8b-2275-4c43-80ad-3138f8eba3bd/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 e8c2a2f5606e46c1a328e1728dc6cdf6823e5c50ed56fab8310a8cb7bd30fe62 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:33:09,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:33:09,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:33:09,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:33:09,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:33:09,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:33:09,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:33:09,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:33:09,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:33:09,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:33:09,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:33:09,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:33:09,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:33:09,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:33:09,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:33:09,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:33:09,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:33:09,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:33:09,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:33:09,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:33:09,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:33:09,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:33:09,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:33:09,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:33:09,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:33:09,173 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:33:09,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:33:09,175 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:33:09,176 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:33:09,177 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:33:09,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:33:09,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:33:09,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:33:09,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:33:09,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:33:09,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:33:09,188 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:33:09,188 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:33:09,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:33:09,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:33:09,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:33:09,191 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-32bit-Taipan_Default.epf [2021-11-21 01:33:09,240 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:33:09,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:33:09,241 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:33:09,241 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:33:09,242 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:33:09,242 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:33:09,242 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:33:09,242 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:33:09,243 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:33:09,243 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:33:09,243 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:33:09,243 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:33:09,244 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:33:09,244 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:33:09,244 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:33:09,244 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:33:09,245 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:33:09,245 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:33:09,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:33:09,246 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:33:09,246 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:33:09,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:33:09,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:33:09,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:33:09,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:33:09,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:33:09,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:33:09,248 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-21 01:33:09,248 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:33:09,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:33:09,249 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:33:09,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:33:09,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:33:09,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:33:09,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:33:09,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:33:09,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:33:09,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:33:09,251 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:33:09,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:33:09,251 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:33:09,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:33:09,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:33:09,252 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_a736cb8b-2275-4c43-80ad-3138f8eba3bd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8c2a2f5606e46c1a328e1728dc6cdf6823e5c50ed56fab8310a8cb7bd30fe62 [2021-11-21 01:33:09,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:33:09,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:33:09,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:33:09,570 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:33:09,571 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:33:09,573 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/loop-zilu/benchmark41_conjunctive.i [2021-11-21 01:33:09,673 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/data/eb9d04ba7/55fa6b165a214287be826d974a1f094f/FLAG0365f6dae [2021-11-21 01:33:10,199 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:33:10,199 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/sv-benchmarks/c/loop-zilu/benchmark41_conjunctive.i [2021-11-21 01:33:10,207 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/data/eb9d04ba7/55fa6b165a214287be826d974a1f094f/FLAG0365f6dae [2021-11-21 01:33:10,538 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/data/eb9d04ba7/55fa6b165a214287be826d974a1f094f [2021-11-21 01:33:10,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:33:10,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:33:10,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:33:10,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:33:10,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:33:10,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:33:10" (1/1) ... [2021-11-21 01:33:10,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57f10459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:10, skipping insertion in model container [2021-11-21 01:33:10,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:33:10" (1/1) ... [2021-11-21 01:33:10,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:33:10,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:33:10,779 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_a736cb8b-2275-4c43-80ad-3138f8eba3bd/sv-benchmarks/c/loop-zilu/benchmark41_conjunctive.i[873,886] [2021-11-21 01:33:10,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:33:10,795 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:33:10,808 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_a736cb8b-2275-4c43-80ad-3138f8eba3bd/sv-benchmarks/c/loop-zilu/benchmark41_conjunctive.i[873,886] [2021-11-21 01:33:10,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:33:10,825 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:33:10,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:10 WrapperNode [2021-11-21 01:33:10,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:33:10,827 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:33:10,827 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:33:10,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:33:10,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:10" (1/1) ... [2021-11-21 01:33:10,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:10" (1/1) ... [2021-11-21 01:33:10,861 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2021-11-21 01:33:10,861 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:33:10,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:33:10,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:33:10,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:33:10,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:10" (1/1) ... [2021-11-21 01:33:10,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:10" (1/1) ... [2021-11-21 01:33:10,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:10" (1/1) ... [2021-11-21 01:33:10,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:10" (1/1) ... [2021-11-21 01:33:10,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:10" (1/1) ... [2021-11-21 01:33:10,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:10" (1/1) ... [2021-11-21 01:33:10,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:10" (1/1) ... [2021-11-21 01:33:10,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:33:10,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:33:10,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:33:10,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:33:10,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:10" (1/1) ... [2021-11-21 01:33:10,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:33:10,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:10,915 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:33:10,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:33:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:33:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:33:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:33:10,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:33:11,004 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:33:11,006 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:33:11,180 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:33:11,218 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:33:11,218 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:33:11,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:33:11 BoogieIcfgContainer [2021-11-21 01:33:11,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:33:11,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:33:11,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:33:11,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:33:11,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:33:10" (1/3) ... [2021-11-21 01:33:11,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e7cf9b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:33:11, skipping insertion in model container [2021-11-21 01:33:11,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:33:10" (2/3) ... [2021-11-21 01:33:11,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e7cf9b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:33:11, skipping insertion in model container [2021-11-21 01:33:11,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:33:11" (3/3) ... [2021-11-21 01:33:11,232 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark41_conjunctive.i [2021-11-21 01:33:11,237 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:33:11,238 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-21 01:33:11,307 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:33:11,320 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 01:33:11,321 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-21 01:33:11,340 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 1.8125) internal successors, (29), 26 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 01:33:11,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 01:33:11,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:11,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 01:33:11,358 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:11,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:11,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2658639, now seen corresponding path program 1 times [2021-11-21 01:33:11,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:11,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753261791] [2021-11-21 01:33:11,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:11,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:11,526 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 01:33:11,526 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:11,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753261791] [2021-11-21 01:33:11,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753261791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:11,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:11,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:33:11,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229326814] [2021-11-21 01:33:11,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:11,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:33:11,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:11,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:33:11,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:33:11,563 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.8125) internal successors, (29), 26 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) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 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 01:33:11,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:11,697 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-11-21 01:33:11,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:33:11,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 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 01:33:11,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:11,707 INFO L225 Difference]: With dead ends: 44 [2021-11-21 01:33:11,707 INFO L226 Difference]: Without dead ends: 37 [2021-11-21 01:33:11,710 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 01:33:11,714 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:11,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 38 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:33:11,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-21 01:33:11,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2021-11-21 01:33:11,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.6875) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:11,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-11-21 01:33:11,748 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 4 [2021-11-21 01:33:11,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:11,749 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-11-21 01:33:11,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 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 01:33:11,749 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-11-21 01:33:11,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 01:33:11,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:11,750 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 01:33:11,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:33:11,751 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:11,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:11,751 INFO L85 PathProgramCache]: Analyzing trace with hash 82417859, now seen corresponding path program 1 times [2021-11-21 01:33:11,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:11,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697842427] [2021-11-21 01:33:11,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:11,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:11,805 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 01:33:11,805 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:11,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697842427] [2021-11-21 01:33:11,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697842427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:11,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:11,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:33:11,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47881914] [2021-11-21 01:33:11,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:11,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:33:11,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:11,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:33:11,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:33:11,809 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) 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 01:33:11,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:11,848 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-11-21 01:33:11,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:33:11,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) 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 01:33:11,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:11,850 INFO L225 Difference]: With dead ends: 26 [2021-11-21 01:33:11,850 INFO L226 Difference]: Without dead ends: 25 [2021-11-21 01:33:11,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 01:33:11,852 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:11,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 18 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:33:11,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-21 01:33:11,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-21 01:33:11,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.625) internal successors, (26), 24 states have internal predecessors, (26), 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 01:33:11,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-11-21 01:33:11,870 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 5 [2021-11-21 01:33:11,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:11,870 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-11-21 01:33:11,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) 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 01:33:11,871 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-11-21 01:33:11,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 01:33:11,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:11,871 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 01:33:11,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:33:11,872 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:11,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:11,873 INFO L85 PathProgramCache]: Analyzing trace with hash 82461648, now seen corresponding path program 1 times [2021-11-21 01:33:11,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:11,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107583699] [2021-11-21 01:33:11,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:11,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:11,918 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 01:33:11,919 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:11,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107583699] [2021-11-21 01:33:11,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107583699] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:11,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:11,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:33:11,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344601035] [2021-11-21 01:33:11,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:11,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:33:11,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:11,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:33:11,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:33:11,925 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) 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 01:33:11,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:12,001 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-11-21 01:33:12,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:33:12,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) 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 01:33:12,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:12,003 INFO L225 Difference]: With dead ends: 35 [2021-11-21 01:33:12,003 INFO L226 Difference]: Without dead ends: 34 [2021-11-21 01:33:12,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 01:33:12,006 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:12,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 33 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:33:12,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-21 01:33:12,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2021-11-21 01:33:12,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 26 states have internal predecessors, (28), 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 01:33:12,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-11-21 01:33:12,022 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 5 [2021-11-21 01:33:12,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:12,023 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-11-21 01:33:12,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) 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 01:33:12,025 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-11-21 01:33:12,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:33:12,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:12,027 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:33:12,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:33:12,027 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:12,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:12,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1740013615, now seen corresponding path program 1 times [2021-11-21 01:33:12,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:12,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982664202] [2021-11-21 01:33:12,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:12,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:12,087 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 01:33:12,087 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:12,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982664202] [2021-11-21 01:33:12,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982664202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:12,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:12,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:33:12,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56401733] [2021-11-21 01:33:12,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:12,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:33:12,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:12,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:33:12,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:33:12,091 INFO L87 Difference]: Start difference. First operand 27 states and 28 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 01:33:12,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:12,135 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-11-21 01:33:12,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:33:12,135 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 01:33:12,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:12,136 INFO L225 Difference]: With dead ends: 38 [2021-11-21 01:33:12,137 INFO L226 Difference]: Without dead ends: 37 [2021-11-21 01:33:12,137 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 01:33:12,139 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:12,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 32 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:33:12,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-21 01:33:12,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2021-11-21 01:33:12,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.5) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:12,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-11-21 01:33:12,146 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 6 [2021-11-21 01:33:12,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:12,146 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-11-21 01:33:12,146 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 01:33:12,147 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-11-21 01:33:12,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:33:12,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:12,147 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:33:12,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:33:12,148 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:12,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:12,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1738656139, now seen corresponding path program 1 times [2021-11-21 01:33:12,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:12,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646052084] [2021-11-21 01:33:12,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:12,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:12,183 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 01:33:12,183 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:12,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646052084] [2021-11-21 01:33:12,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646052084] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:12,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:12,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:33:12,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147343412] [2021-11-21 01:33:12,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:12,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:33:12,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:12,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:33:12,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:33:12,186 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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 01:33:12,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:12,220 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-11-21 01:33:12,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:33:12,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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 01:33:12,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:12,222 INFO L225 Difference]: With dead ends: 31 [2021-11-21 01:33:12,222 INFO L226 Difference]: Without dead ends: 30 [2021-11-21 01:33:12,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 01:33:12,224 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:12,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 21 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:33:12,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-21 01:33:12,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-21 01:33:12,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:12,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-11-21 01:33:12,231 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 6 [2021-11-21 01:33:12,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:12,231 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-11-21 01:33:12,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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 01:33:12,232 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-11-21 01:33:12,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:33:12,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:12,233 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:12,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:33:12,233 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:12,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:12,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1894152837, now seen corresponding path program 1 times [2021-11-21 01:33:12,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:12,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670762084] [2021-11-21 01:33:12,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:12,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:12,278 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 01:33:12,279 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:12,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670762084] [2021-11-21 01:33:12,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670762084] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:12,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:12,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:33:12,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825158573] [2021-11-21 01:33:12,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:12,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:33:12,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:12,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:33:12,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:33:12,282 INFO L87 Difference]: Start difference. First operand 30 states and 31 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 01:33:12,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:12,324 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-11-21 01:33:12,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:33:12,325 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 01:33:12,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:12,326 INFO L225 Difference]: With dead ends: 30 [2021-11-21 01:33:12,328 INFO L226 Difference]: Without dead ends: 29 [2021-11-21 01:33:12,329 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 01:33:12,330 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:12,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:33:12,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-21 01:33:12,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-21 01:33:12,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:12,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-11-21 01:33:12,345 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 7 [2021-11-21 01:33:12,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:12,345 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-11-21 01:33:12,350 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 01:33:12,350 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-11-21 01:33:12,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:33:12,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:12,351 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:12,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:33:12,351 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:12,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:12,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1936234610, now seen corresponding path program 1 times [2021-11-21 01:33:12,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:12,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124150598] [2021-11-21 01:33:12,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:12,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:12,383 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 01:33:12,383 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:12,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124150598] [2021-11-21 01:33:12,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124150598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:12,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:12,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:33:12,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524136805] [2021-11-21 01:33:12,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:12,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:33:12,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:12,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:33:12,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:33:12,386 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 01:33:12,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:12,423 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-11-21 01:33:12,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:33:12,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 01:33:12,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:12,425 INFO L225 Difference]: With dead ends: 33 [2021-11-21 01:33:12,425 INFO L226 Difference]: Without dead ends: 32 [2021-11-21 01:33:12,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 01:33:12,426 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:12,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 28 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:33:12,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-21 01:33:12,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-11-21 01:33:12,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:12,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-11-21 01:33:12,432 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 7 [2021-11-21 01:33:12,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:12,433 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-11-21 01:33:12,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 01:33:12,433 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-11-21 01:33:12,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:33:12,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:12,434 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:12,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:33:12,434 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:12,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:12,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1410804141, now seen corresponding path program 1 times [2021-11-21 01:33:12,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:12,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878643411] [2021-11-21 01:33:12,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:12,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:12,458 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 01:33:12,458 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:12,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878643411] [2021-11-21 01:33:12,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878643411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:12,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:12,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-21 01:33:12,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39840663] [2021-11-21 01:33:12,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:12,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:33:12,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:12,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:33:12,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:33:12,461 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 01:33:12,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:12,474 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-11-21 01:33:12,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:33:12,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-11-21 01:33:12,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:12,475 INFO L225 Difference]: With dead ends: 30 [2021-11-21 01:33:12,475 INFO L226 Difference]: Without dead ends: 29 [2021-11-21 01:33:12,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:33:12,476 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:12,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 12 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:33:12,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-21 01:33:12,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-21 01:33:12,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:12,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-11-21 01:33:12,482 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 8 [2021-11-21 01:33:12,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:12,482 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-11-21 01:33:12,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 01:33:12,482 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-11-21 01:33:12,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:33:12,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:12,483 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:12,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:33:12,484 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:12,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:12,484 INFO L85 PathProgramCache]: Analyzing trace with hash -106269161, now seen corresponding path program 1 times [2021-11-21 01:33:12,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:12,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203361113] [2021-11-21 01:33:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:12,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:12,545 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 01:33:12,546 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:12,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203361113] [2021-11-21 01:33:12,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203361113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:12,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:12,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:33:12,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753795822] [2021-11-21 01:33:12,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:12,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:33:12,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:12,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:33:12,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:33:12,548 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 01:33:12,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:12,602 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-11-21 01:33:12,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:33:12,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2021-11-21 01:33:12,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:12,605 INFO L225 Difference]: With dead ends: 31 [2021-11-21 01:33:12,605 INFO L226 Difference]: Without dead ends: 25 [2021-11-21 01:33:12,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 01:33:12,608 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:12,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 14 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:33:12,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-21 01:33:12,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-21 01:33:12,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 24 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 01:33:12,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-11-21 01:33:12,614 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 8 [2021-11-21 01:33:12,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:12,615 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-11-21 01:33:12,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 01:33:12,615 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-11-21 01:33:12,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 01:33:12,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:12,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:12,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:33:12,616 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:12,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:12,617 INFO L85 PathProgramCache]: Analyzing trace with hash -785255353, now seen corresponding path program 1 times [2021-11-21 01:33:12,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:12,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869323288] [2021-11-21 01:33:12,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:12,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:12,657 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 01:33:12,657 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:12,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869323288] [2021-11-21 01:33:12,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869323288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:12,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:12,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:33:12,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405606801] [2021-11-21 01:33:12,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:12,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:33:12,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:12,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:33:12,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:33:12,661 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:12,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:12,680 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-11-21 01:33:12,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:33:12,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-21 01:33:12,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:12,681 INFO L225 Difference]: With dead ends: 29 [2021-11-21 01:33:12,682 INFO L226 Difference]: Without dead ends: 28 [2021-11-21 01:33:12,682 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 01:33:12,683 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:12,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:33:12,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-21 01:33:12,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-21 01:33:12,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 27 states have internal predecessors, (28), 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 01:33:12,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-11-21 01:33:12,694 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 9 [2021-11-21 01:33:12,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:12,694 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-11-21 01:33:12,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:12,695 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-11-21 01:33:12,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:33:12,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:12,695 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:12,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:33:12,696 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:12,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:12,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1283851337, now seen corresponding path program 1 times [2021-11-21 01:33:12,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:12,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480384558] [2021-11-21 01:33:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:12,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:12,736 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 01:33:12,737 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:12,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480384558] [2021-11-21 01:33:12,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480384558] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:12,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603419697] [2021-11-21 01:33:12,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:12,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:12,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:12,739 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:12,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:33:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:12,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:33:12,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:12,914 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 01:33:12,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:12,996 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 01:33:12,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603419697] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:12,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1232816182] [2021-11-21 01:33:13,034 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:33:13,034 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:13,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:13,059 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:13,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:15,250 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:16,007 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:16,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:33:16,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-21 01:33:16,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853961565] [2021-11-21 01:33:16,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:16,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:33:16,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:16,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:33:16,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:33:16,009 INFO L87 Difference]: Start difference. First operand 28 states and 28 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 01:33:16,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:16,160 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2021-11-21 01:33:16,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:33:16,161 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 01:33:16,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:16,162 INFO L225 Difference]: With dead ends: 77 [2021-11-21 01:33:16,162 INFO L226 Difference]: Without dead ends: 76 [2021-11-21 01:33:16,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-11-21 01:33:16,164 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 66 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:16,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 70 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:33:16,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-21 01:33:16,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 44. [2021-11-21 01:33:16,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-11-21 01:33:16,170 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 11 [2021-11-21 01:33:16,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:16,170 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-11-21 01:33:16,170 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 01:33:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-11-21 01:33:16,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 01:33:16,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:16,171 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:16,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:16,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:16,388 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:16,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:16,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1144729622, now seen corresponding path program 1 times [2021-11-21 01:33:16,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:16,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819206541] [2021-11-21 01:33:16,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:16,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:16,436 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:16,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819206541] [2021-11-21 01:33:16,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819206541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:16,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25065703] [2021-11-21 01:33:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:16,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:16,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:16,438 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:16,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:33:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:16,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:33:16,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:16,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:16,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25065703] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:16,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1909832670] [2021-11-21 01:33:16,665 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-21 01:33:16,665 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:16,665 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:16,665 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:16,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:18,596 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:19,422 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:19,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:33:19,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2021-11-21 01:33:19,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105399340] [2021-11-21 01:33:19,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:19,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 01:33:19,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:19,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 01:33:19,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-11-21 01:33:19,425 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 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 01:33:19,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:19,565 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-11-21 01:33:19,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:33:19,566 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 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 12 [2021-11-21 01:33:19,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:19,567 INFO L225 Difference]: With dead ends: 57 [2021-11-21 01:33:19,567 INFO L226 Difference]: Without dead ends: 56 [2021-11-21 01:33:19,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-11-21 01:33:19,569 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:19,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 46 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:33:19,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-21 01:33:19,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-11-21 01:33:19,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.358974358974359) internal successors, (53), 45 states have internal predecessors, (53), 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 01:33:19,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-11-21 01:33:19,574 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 12 [2021-11-21 01:33:19,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:19,574 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-11-21 01:33:19,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 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 01:33:19,575 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-11-21 01:33:19,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:33:19,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:19,576 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:19,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:19,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-21 01:33:19,786 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:19,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:19,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1125522507, now seen corresponding path program 1 times [2021-11-21 01:33:19,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:19,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358310715] [2021-11-21 01:33:19,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:19,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:19,841 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 01:33:19,842 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:19,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358310715] [2021-11-21 01:33:19,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358310715] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:19,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140583137] [2021-11-21 01:33:19,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:19,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:19,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:19,846 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:19,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:33:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:19,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:33:19,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:19,912 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 01:33:19,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:19,972 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 01:33:19,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140583137] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:19,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1949304048] [2021-11-21 01:33:19,976 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:33:19,977 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:19,977 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:19,977 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:19,978 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:21,670 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:22,256 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:22,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:33:22,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-21 01:33:22,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34483055] [2021-11-21 01:33:22,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:22,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:33:22,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:22,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:33:22,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:33:22,258 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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 01:33:22,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:22,362 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-11-21 01:33:22,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:33:22,362 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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 13 [2021-11-21 01:33:22,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:22,364 INFO L225 Difference]: With dead ends: 75 [2021-11-21 01:33:22,364 INFO L226 Difference]: Without dead ends: 74 [2021-11-21 01:33:22,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-11-21 01:33:22,366 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:22,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 61 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:33:22,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-21 01:33:22,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 48. [2021-11-21 01:33:22,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 47 states have internal predecessors, (53), 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 01:33:22,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-11-21 01:33:22,371 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 13 [2021-11-21 01:33:22,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:22,371 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-11-21 01:33:22,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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 01:33:22,372 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-11-21 01:33:22,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:33:22,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:22,372 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:22,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:22,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 01:33:22,588 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:22,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:22,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1126879983, now seen corresponding path program 1 times [2021-11-21 01:33:22,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:22,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444175264] [2021-11-21 01:33:22,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:22,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:22,654 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:22,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444175264] [2021-11-21 01:33:22,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444175264] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:22,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:22,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:33:22,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672990987] [2021-11-21 01:33:22,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:22,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:33:22,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:22,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:33:22,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:33:22,657 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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 01:33:22,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:22,712 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-11-21 01:33:22,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:33:22,712 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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) Word has length 13 [2021-11-21 01:33:22,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:22,713 INFO L225 Difference]: With dead ends: 48 [2021-11-21 01:33:22,713 INFO L226 Difference]: Without dead ends: 47 [2021-11-21 01:33:22,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:33:22,714 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:22,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 32 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:33:22,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-21 01:33:22,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-21 01:33:22,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:22,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-11-21 01:33:22,726 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 13 [2021-11-21 01:33:22,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:22,726 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-11-21 01:33:22,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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 01:33:22,727 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-11-21 01:33:22,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 01:33:22,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:22,728 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:22,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 01:33:22,728 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:22,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:22,729 INFO L85 PathProgramCache]: Analyzing trace with hash 573541176, now seen corresponding path program 1 times [2021-11-21 01:33:22,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:22,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429015537] [2021-11-21 01:33:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:22,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:22,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:33:22,790 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:22,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429015537] [2021-11-21 01:33:22,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429015537] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:22,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:22,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:33:22,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217928014] [2021-11-21 01:33:22,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:22,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:33:22,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:22,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:33:22,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:33:22,792 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 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 01:33:22,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:22,844 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-11-21 01:33:22,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:33:22,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-21 01:33:22,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:22,845 INFO L225 Difference]: With dead ends: 47 [2021-11-21 01:33:22,846 INFO L226 Difference]: Without dead ends: 46 [2021-11-21 01:33:22,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:33:22,849 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:22,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 4 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:33:22,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-21 01:33:22,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-21 01:33:22,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-11-21 01:33:22,856 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 14 [2021-11-21 01:33:22,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:22,858 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-11-21 01:33:22,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 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 01:33:22,858 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-11-21 01:33:22,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 01:33:22,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:22,860 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:33:22,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 01:33:22,860 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:22,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:22,861 INFO L85 PathProgramCache]: Analyzing trace with hash 599907345, now seen corresponding path program 1 times [2021-11-21 01:33:22,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:22,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809799193] [2021-11-21 01:33:22,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:22,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:22,943 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:22,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809799193] [2021-11-21 01:33:22,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809799193] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:22,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594412703] [2021-11-21 01:33:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:22,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:22,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:22,946 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:22,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:33:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:22,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:33:22,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:23,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:33:23,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594412703] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:23,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:33:23,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 16 [2021-11-21 01:33:23,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434951812] [2021-11-21 01:33:23,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:23,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:33:23,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:23,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:33:23,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:33:23,224 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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 01:33:23,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:23,291 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-11-21 01:33:23,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:33:23,291 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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) Word has length 15 [2021-11-21 01:33:23,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:23,292 INFO L225 Difference]: With dead ends: 46 [2021-11-21 01:33:23,292 INFO L226 Difference]: Without dead ends: 40 [2021-11-21 01:33:23,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:33:23,293 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:23,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 5 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:33:23,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-21 01:33:23,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-21 01:33:23,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 39 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 01:33:23,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-11-21 01:33:23,297 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 15 [2021-11-21 01:33:23,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:23,298 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-11-21 01:33:23,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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 01:33:23,298 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-11-21 01:33:23,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:33:23,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:23,299 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-21 01:33:23,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-21 01:33:23,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:23,514 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:23,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:23,514 INFO L85 PathProgramCache]: Analyzing trace with hash -368620147, now seen corresponding path program 1 times [2021-11-21 01:33:23,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:23,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549116110] [2021-11-21 01:33:23,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:23,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:23,541 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:23,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549116110] [2021-11-21 01:33:23,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549116110] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:23,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144633801] [2021-11-21 01:33:23,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:23,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:23,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:23,543 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:23,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:33:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:23,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:33:23,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:23,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:23,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144633801] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:23,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1759074733] [2021-11-21 01:33:23,656 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:33:23,657 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:23,657 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:23,657 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:23,657 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:25,207 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:25,779 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:25,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:33:25,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-21 01:33:25,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425262513] [2021-11-21 01:33:25,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:25,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:33:25,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:25,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:33:25,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:33:25,782 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:25,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:25,804 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-11-21 01:33:25,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:33:25,804 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-21 01:33:25,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:25,805 INFO L225 Difference]: With dead ends: 47 [2021-11-21 01:33:25,805 INFO L226 Difference]: Without dead ends: 46 [2021-11-21 01:33:25,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:33:25,806 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:25,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 43 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:33:25,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-21 01:33:25,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-11-21 01:33:25,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 42 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-11-21 01:33:25,810 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 16 [2021-11-21 01:33:25,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:25,811 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-11-21 01:33:25,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:25,811 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-11-21 01:33:25,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 01:33:25,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:25,812 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-21 01:33:25,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:26,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-21 01:33:26,022 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:26,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:26,023 INFO L85 PathProgramCache]: Analyzing trace with hash 857604822, now seen corresponding path program 2 times [2021-11-21 01:33:26,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:26,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515879572] [2021-11-21 01:33:26,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:26,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:26,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:26,103 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:26,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515879572] [2021-11-21 01:33:26,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515879572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:26,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872422880] [2021-11-21 01:33:26,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:33:26,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:26,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:26,105 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:26,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:33:26,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 01:33:26,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:26,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:33:26,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:26,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:26,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872422880] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:26,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1384290191] [2021-11-21 01:33:26,504 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-21 01:33:26,504 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:26,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:26,505 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:26,505 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:28,279 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:29,137 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:29,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:33:29,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2021-11-21 01:33:29,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348891434] [2021-11-21 01:33:29,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:29,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-21 01:33:29,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:29,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-21 01:33:29,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1527, Unknown=0, NotChecked=0, Total=1722 [2021-11-21 01:33:29,140 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 31 states, 30 states have (on average 2.533333333333333) internal successors, (76), 31 states have internal predecessors, (76), 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 01:33:29,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:29,500 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2021-11-21 01:33:29,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-21 01:33:29,501 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.533333333333333) internal successors, (76), 31 states have internal predecessors, (76), 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 01:33:29,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:29,501 INFO L225 Difference]: With dead ends: 76 [2021-11-21 01:33:29,501 INFO L226 Difference]: Without dead ends: 67 [2021-11-21 01:33:29,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=404, Invalid=2676, Unknown=0, NotChecked=0, Total=3080 [2021-11-21 01:33:29,504 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 76 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:29,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 96 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:33:29,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-21 01:33:29,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2021-11-21 01:33:29,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 57 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:29,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2021-11-21 01:33:29,519 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 26 [2021-11-21 01:33:29,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:29,519 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2021-11-21 01:33:29,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.533333333333333) internal successors, (76), 31 states have internal predecessors, (76), 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 01:33:29,520 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2021-11-21 01:33:29,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-21 01:33:29,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:29,523 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2021-11-21 01:33:29,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-21 01:33:29,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-21 01:33:29,737 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:29,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:29,738 INFO L85 PathProgramCache]: Analyzing trace with hash -871110961, now seen corresponding path program 2 times [2021-11-21 01:33:29,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:29,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710862997] [2021-11-21 01:33:29,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:29,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:29,818 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:29,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710862997] [2021-11-21 01:33:29,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710862997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:29,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614246009] [2021-11-21 01:33:29,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:33:29,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:29,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:29,822 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:29,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:33:29,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 01:33:29,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:29,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:33:29,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:29,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:30,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614246009] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:30,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1630704164] [2021-11-21 01:33:30,081 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:33:30,081 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:30,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:30,082 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:30,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:31,621 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:32,240 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:32,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:33:32,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2021-11-21 01:33:32,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89827136] [2021-11-21 01:33:32,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:32,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-21 01:33:32,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:32,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-21 01:33:32,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-11-21 01:33:32,242 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 22 states, 21 states have (on average 3.0) internal successors, (63), 22 states have internal predecessors, (63), 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 01:33:32,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:32,446 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2021-11-21 01:33:32,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-21 01:33:32,446 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 22 states have internal predecessors, (63), 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 32 [2021-11-21 01:33:32,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:32,447 INFO L225 Difference]: With dead ends: 101 [2021-11-21 01:33:32,447 INFO L226 Difference]: Without dead ends: 100 [2021-11-21 01:33:32,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=335, Invalid=1305, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 01:33:32,449 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 95 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:32,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 105 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:33:32,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-21 01:33:32,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 80. [2021-11-21 01:33:32,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 76 states have (on average 1.2236842105263157) internal successors, (93), 79 states have internal predecessors, (93), 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 01:33:32,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2021-11-21 01:33:32,454 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 32 [2021-11-21 01:33:32,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:32,454 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2021-11-21 01:33:32,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 22 states have internal predecessors, (63), 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 01:33:32,455 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2021-11-21 01:33:32,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 01:33:32,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:32,457 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1] [2021-11-21 01:33:32,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:32,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:32,662 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:32,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:32,663 INFO L85 PathProgramCache]: Analyzing trace with hash 380990801, now seen corresponding path program 2 times [2021-11-21 01:33:32,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:32,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394820171] [2021-11-21 01:33:32,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:32,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:32,770 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:32,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394820171] [2021-11-21 01:33:32,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394820171] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:32,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781168084] [2021-11-21 01:33:32,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:33:32,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:32,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:32,772 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:32,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:33:32,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 01:33:32,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:32,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:33:32,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:32,892 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:32,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:33,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781168084] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:33,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1935404236] [2021-11-21 01:33:33,047 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:33:33,047 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:33,048 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:33,048 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:33,048 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:34,447 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:35,098 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:35,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:33:35,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2021-11-21 01:33:35,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587423406] [2021-11-21 01:33:35,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:35,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-21 01:33:35,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:35,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-21 01:33:35,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-11-21 01:33:35,100 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 22 states have internal predecessors, (67), 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 01:33:35,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:35,317 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-11-21 01:33:35,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-21 01:33:35,317 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 22 states have internal predecessors, (67), 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 34 [2021-11-21 01:33:35,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:35,318 INFO L225 Difference]: With dead ends: 98 [2021-11-21 01:33:35,318 INFO L226 Difference]: Without dead ends: 97 [2021-11-21 01:33:35,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=335, Invalid=1305, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 01:33:35,320 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 107 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:35,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 97 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:33:35,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-21 01:33:35,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 82. [2021-11-21 01:33:35,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 81 states have internal predecessors, (90), 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 01:33:35,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2021-11-21 01:33:35,324 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 34 [2021-11-21 01:33:35,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:35,327 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2021-11-21 01:33:35,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 22 states have internal predecessors, (67), 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 01:33:35,327 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2021-11-21 01:33:35,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 01:33:35,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:35,331 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1] [2021-11-21 01:33:35,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-21 01:33:35,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:35,531 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:35,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:35,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1501557049, now seen corresponding path program 2 times [2021-11-21 01:33:35,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:35,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035513321] [2021-11-21 01:33:35,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:35,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:35,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:35,582 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:35,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035513321] [2021-11-21 01:33:35,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035513321] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:35,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503310696] [2021-11-21 01:33:35,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:33:35,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:35,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:35,599 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:35,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:33:35,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 01:33:35,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:35,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:33:35,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:35,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:35,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503310696] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:35,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1046912145] [2021-11-21 01:33:35,838 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:33:35,838 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:35,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:35,839 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:35,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:37,261 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:37,815 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:37,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:33:37,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-21 01:33:37,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252034953] [2021-11-21 01:33:37,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:37,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:33:37,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:37,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:33:37,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:33:37,816 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 12 states, 11 states have (on average 6.636363636363637) internal successors, (73), 12 states have internal predecessors, (73), 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 01:33:37,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:37,858 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2021-11-21 01:33:37,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:33:37,859 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.636363636363637) internal successors, (73), 12 states have internal predecessors, (73), 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 37 [2021-11-21 01:33:37,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:37,860 INFO L225 Difference]: With dead ends: 95 [2021-11-21 01:33:37,860 INFO L226 Difference]: Without dead ends: 94 [2021-11-21 01:33:37,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:33:37,861 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:37,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 75 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:33:37,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-21 01:33:37,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2021-11-21 01:33:37,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 84 states have internal predecessors, (88), 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 01:33:37,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2021-11-21 01:33:37,866 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 37 [2021-11-21 01:33:37,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:37,866 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2021-11-21 01:33:37,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.636363636363637) internal successors, (73), 12 states have internal predecessors, (73), 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 01:33:37,867 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2021-11-21 01:33:37,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-21 01:33:37,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:37,868 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2021-11-21 01:33:37,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:38,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:38,084 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:38,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:38,085 INFO L85 PathProgramCache]: Analyzing trace with hash -42452906, now seen corresponding path program 3 times [2021-11-21 01:33:38,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:38,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715581669] [2021-11-21 01:33:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:38,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:38,295 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:38,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715581669] [2021-11-21 01:33:38,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715581669] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:38,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554485877] [2021-11-21 01:33:38,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:33:38,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:38,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:38,297 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:38,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:33:38,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:33:38,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:38,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-21 01:33:38,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:38,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:39,257 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:39,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554485877] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:39,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1332961012] [2021-11-21 01:33:39,259 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-21 01:33:39,259 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:39,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:39,260 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:39,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:40,831 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:41,677 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:41,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:33:41,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 23] total 62 [2021-11-21 01:33:41,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242667371] [2021-11-21 01:33:41,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:41,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-21 01:33:41,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:41,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-21 01:33:41,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=625, Invalid=4777, Unknown=0, NotChecked=0, Total=5402 [2021-11-21 01:33:41,680 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 63 states, 62 states have (on average 2.5806451612903225) internal successors, (160), 63 states have internal predecessors, (160), 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 01:33:42,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:42,496 INFO L93 Difference]: Finished difference Result 146 states and 153 transitions. [2021-11-21 01:33:42,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-21 01:33:42,497 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.5806451612903225) internal successors, (160), 63 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-21 01:33:42,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:42,498 INFO L225 Difference]: With dead ends: 146 [2021-11-21 01:33:42,498 INFO L226 Difference]: Without dead ends: 129 [2021-11-21 01:33:42,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4781 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1510, Invalid=9620, Unknown=0, NotChecked=0, Total=11130 [2021-11-21 01:33:42,503 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 254 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:42,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 125 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:33:42,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-21 01:33:42,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 114. [2021-11-21 01:33:42,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 110 states have (on average 1.1454545454545455) internal successors, (126), 113 states have internal predecessors, (126), 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 01:33:42,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2021-11-21 01:33:42,509 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 54 [2021-11-21 01:33:42,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:42,509 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2021-11-21 01:33:42,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.5806451612903225) internal successors, (160), 63 states have internal predecessors, (160), 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 01:33:42,509 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2021-11-21 01:33:42,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-21 01:33:42,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:42,511 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1] [2021-11-21 01:33:42,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:42,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:42,726 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:42,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:42,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1924812559, now seen corresponding path program 3 times [2021-11-21 01:33:42,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:42,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249971525] [2021-11-21 01:33:42,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:42,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:42,997 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:42,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249971525] [2021-11-21 01:33:42,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249971525] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:42,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030655001] [2021-11-21 01:33:42,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:33:42,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:42,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:42,999 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:43,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 01:33:43,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:33:43,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:43,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 01:33:43,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:43,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:43,745 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:43,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030655001] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:43,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1952732155] [2021-11-21 01:33:43,747 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:33:43,748 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:43,748 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:43,748 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:43,748 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:45,032 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:45,781 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:45,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:33:45,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2021-11-21 01:33:45,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897548937] [2021-11-21 01:33:45,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:45,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-21 01:33:45,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:45,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-21 01:33:45,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=2391, Unknown=0, NotChecked=0, Total=2970 [2021-11-21 01:33:45,784 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand has 46 states, 45 states have (on average 3.2666666666666666) internal successors, (147), 46 states have internal predecessors, (147), 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 01:33:46,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:46,313 INFO L93 Difference]: Finished difference Result 209 states and 220 transitions. [2021-11-21 01:33:46,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-21 01:33:46,314 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.2666666666666666) internal successors, (147), 46 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-21 01:33:46,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:46,315 INFO L225 Difference]: With dead ends: 209 [2021-11-21 01:33:46,315 INFO L226 Difference]: Without dead ends: 208 [2021-11-21 01:33:46,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1502 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1361, Invalid=4491, Unknown=0, NotChecked=0, Total=5852 [2021-11-21 01:33:46,318 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 241 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:46,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 174 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:33:46,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-21 01:33:46,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 164. [2021-11-21 01:33:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 160 states have (on average 1.20625) internal successors, (193), 163 states have internal predecessors, (193), 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 01:33:46,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 193 transitions. [2021-11-21 01:33:46,332 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 193 transitions. Word has length 74 [2021-11-21 01:33:46,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:46,332 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 193 transitions. [2021-11-21 01:33:46,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.2666666666666666) internal successors, (147), 46 states have internal predecessors, (147), 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 01:33:46,333 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 193 transitions. [2021-11-21 01:33:46,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-21 01:33:46,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:46,334 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 1, 1, 1] [2021-11-21 01:33:46,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:46,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:46,555 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:46,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:46,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1386033775, now seen corresponding path program 3 times [2021-11-21 01:33:46,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:46,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435819044] [2021-11-21 01:33:46,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:46,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 355 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:46,811 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:46,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435819044] [2021-11-21 01:33:46,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435819044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:46,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198295534] [2021-11-21 01:33:46,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:33:46,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:46,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:46,818 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:46,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 01:33:46,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:33:46,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:46,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 01:33:46,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:47,069 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 355 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:47,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 355 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:47,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198295534] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:47,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1158970428] [2021-11-21 01:33:47,601 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:33:47,601 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:47,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:47,602 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:47,602 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:48,916 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:49,619 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:49,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:33:49,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2021-11-21 01:33:49,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260967705] [2021-11-21 01:33:49,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:49,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-21 01:33:49,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:49,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-21 01:33:49,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=2391, Unknown=0, NotChecked=0, Total=2970 [2021-11-21 01:33:49,622 INFO L87 Difference]: Start difference. First operand 164 states and 193 transitions. Second operand has 46 states, 45 states have (on average 3.3555555555555556) internal successors, (151), 46 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:50,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:50,122 INFO L93 Difference]: Finished difference Result 200 states and 211 transitions. [2021-11-21 01:33:50,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-21 01:33:50,123 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.3555555555555556) internal successors, (151), 46 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-21 01:33:50,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:50,126 INFO L225 Difference]: With dead ends: 200 [2021-11-21 01:33:50,126 INFO L226 Difference]: Without dead ends: 199 [2021-11-21 01:33:50,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1361, Invalid=4491, Unknown=0, NotChecked=0, Total=5852 [2021-11-21 01:33:50,132 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 203 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:50,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 175 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:33:50,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-21 01:33:50,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2021-11-21 01:33:50,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 162 states have (on average 1.1358024691358024) internal successors, (184), 165 states have internal predecessors, (184), 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 01:33:50,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 184 transitions. [2021-11-21 01:33:50,141 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 184 transitions. Word has length 76 [2021-11-21 01:33:50,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:50,141 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 184 transitions. [2021-11-21 01:33:50,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.3555555555555556) internal successors, (151), 46 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:50,147 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 184 transitions. [2021-11-21 01:33:50,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-21 01:33:50,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:50,148 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 1, 1, 1] [2021-11-21 01:33:50,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-21 01:33:50,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-21 01:33:50,366 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:50,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:50,366 INFO L85 PathProgramCache]: Analyzing trace with hash 483446407, now seen corresponding path program 3 times [2021-11-21 01:33:50,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:50,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782449265] [2021-11-21 01:33:50,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:50,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:50,474 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:50,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782449265] [2021-11-21 01:33:50,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782449265] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:50,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679281079] [2021-11-21 01:33:50,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:33:50,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:50,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:50,475 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:50,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 01:33:50,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:33:50,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:33:50,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:33:50,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:50,698 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:50,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:51,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679281079] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:51,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [942018017] [2021-11-21 01:33:51,015 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:33:51,015 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:51,016 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:51,016 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:51,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:52,301 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:52,898 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:52,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:33:52,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-11-21 01:33:52,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374088911] [2021-11-21 01:33:52,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:52,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-21 01:33:52,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:52,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-21 01:33:52,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:33:52,900 INFO L87 Difference]: Start difference. First operand 166 states and 184 transitions. Second operand has 24 states, 23 states have (on average 6.826086956521739) internal successors, (157), 24 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:52,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:52,966 INFO L93 Difference]: Finished difference Result 191 states and 202 transitions. [2021-11-21 01:33:52,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 01:33:52,967 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.826086956521739) internal successors, (157), 24 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-21 01:33:52,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:52,968 INFO L225 Difference]: With dead ends: 191 [2021-11-21 01:33:52,968 INFO L226 Difference]: Without dead ends: 190 [2021-11-21 01:33:52,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:33:52,969 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:52,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 155 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:33:52,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-21 01:33:52,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 169. [2021-11-21 01:33:52,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 165 states have (on average 1.0666666666666667) internal successors, (176), 168 states have internal predecessors, (176), 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 01:33:52,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 176 transitions. [2021-11-21 01:33:52,977 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 176 transitions. Word has length 79 [2021-11-21 01:33:52,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:52,977 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 176 transitions. [2021-11-21 01:33:52,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.826086956521739) internal successors, (157), 24 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:52,978 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 176 transitions. [2021-11-21 01:33:52,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-21 01:33:52,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:52,979 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1] [2021-11-21 01:33:53,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-21 01:33:53,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-21 01:33:53,186 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:33:53,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:53,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1286675626, now seen corresponding path program 4 times [2021-11-21 01:33:53,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:53,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31278250] [2021-11-21 01:33:53,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:53,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:53,587 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:53,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31278250] [2021-11-21 01:33:53,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31278250] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:33:53,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158517701] [2021-11-21 01:33:53,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:33:53,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:33:53,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:33:53,590 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:33:53,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 01:33:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:53,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-21 01:33:53,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:54,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:33:56,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158517701] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:56,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1807288826] [2021-11-21 01:33:56,181 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-21 01:33:56,181 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:56,181 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:33:56,181 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:33:56,182 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:33:57,900 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:33:58,910 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:33:58,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:33:58,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 47, 47] total 126 [2021-11-21 01:33:58,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821681870] [2021-11-21 01:33:58,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:58,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-11-21 01:33:58,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:58,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-11-21 01:33:58,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2301, Invalid=16605, Unknown=0, NotChecked=0, Total=18906 [2021-11-21 01:33:58,917 INFO L87 Difference]: Start difference. First operand 169 states and 176 transitions. Second operand has 127 states, 126 states have (on average 2.6031746031746033) internal successors, (328), 127 states have internal predecessors, (328), 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 01:34:01,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:01,018 INFO L93 Difference]: Finished difference Result 286 states and 301 transitions. [2021-11-21 01:34:01,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-11-21 01:34:01,019 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 126 states have (on average 2.6031746031746033) internal successors, (328), 127 states have internal predecessors, (328), 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 110 [2021-11-21 01:34:01,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:01,021 INFO L225 Difference]: With dead ends: 286 [2021-11-21 01:34:01,021 INFO L226 Difference]: Without dead ends: 253 [2021-11-21 01:34:01,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18945 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5930, Invalid=36300, Unknown=0, NotChecked=0, Total=42230 [2021-11-21 01:34:01,026 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 483 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:01,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 192 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:34:01,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-21 01:34:01,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 226. [2021-11-21 01:34:01,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 222 states have (on average 1.1261261261261262) internal successors, (250), 225 states have internal predecessors, (250), 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 01:34:01,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 250 transitions. [2021-11-21 01:34:01,036 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 250 transitions. Word has length 110 [2021-11-21 01:34:01,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:01,036 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 250 transitions. [2021-11-21 01:34:01,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 126 states have (on average 2.6031746031746033) internal successors, (328), 127 states have internal predecessors, (328), 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 01:34:01,037 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 250 transitions. [2021-11-21 01:34:01,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-21 01:34:01,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:01,039 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1, 1] [2021-11-21 01:34:01,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:01,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:01,246 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:34:01,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:01,246 INFO L85 PathProgramCache]: Analyzing trace with hash -25677937, now seen corresponding path program 4 times [2021-11-21 01:34:01,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:01,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649744288] [2021-11-21 01:34:01,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:01,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:02,097 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:02,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649744288] [2021-11-21 01:34:02,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649744288] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:34:02,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753840128] [2021-11-21 01:34:02,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:34:02,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:02,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:02,098 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:02,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-21 01:34:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:02,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-21 01:34:02,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:02,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:02,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:04,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753840128] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:34:04,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2135220172] [2021-11-21 01:34:04,305 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:34:04,305 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:34:04,305 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:34:04,305 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:34:04,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:34:05,654 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:34:06,492 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:34:06,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:34:06,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2021-11-21 01:34:06,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730346917] [2021-11-21 01:34:06,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:34:06,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-21 01:34:06,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:06,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-21 01:34:06,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2283, Invalid=8223, Unknown=0, NotChecked=0, Total=10506 [2021-11-21 01:34:06,496 INFO L87 Difference]: Start difference. First operand 226 states and 250 transitions. Second operand has 94 states, 93 states have (on average 3.3870967741935485) internal successors, (315), 94 states have internal predecessors, (315), 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 01:34:08,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:08,057 INFO L93 Difference]: Finished difference Result 425 states and 448 transitions. [2021-11-21 01:34:08,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-21 01:34:08,058 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 3.3870967741935485) internal successors, (315), 94 states have internal predecessors, (315), 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 158 [2021-11-21 01:34:08,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:08,060 INFO L225 Difference]: With dead ends: 425 [2021-11-21 01:34:08,060 INFO L226 Difference]: Without dead ends: 424 [2021-11-21 01:34:08,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5366 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5573, Invalid=16479, Unknown=0, NotChecked=0, Total=22052 [2021-11-21 01:34:08,063 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 591 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:08,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 299 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:34:08,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-11-21 01:34:08,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 332. [2021-11-21 01:34:08,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 328 states have (on average 1.1981707317073171) internal successors, (393), 331 states have internal predecessors, (393), 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 01:34:08,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 393 transitions. [2021-11-21 01:34:08,076 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 393 transitions. Word has length 158 [2021-11-21 01:34:08,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:08,077 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 393 transitions. [2021-11-21 01:34:08,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 3.3870967741935485) internal successors, (315), 94 states have internal predecessors, (315), 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 01:34:08,077 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 393 transitions. [2021-11-21 01:34:08,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-21 01:34:08,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:08,079 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 1, 1, 1] [2021-11-21 01:34:08,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:08,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-21 01:34:08,282 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:34:08,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:08,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1093307921, now seen corresponding path program 4 times [2021-11-21 01:34:08,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:08,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578972349] [2021-11-21 01:34:08,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:08,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 1705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:09,018 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:09,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578972349] [2021-11-21 01:34:09,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578972349] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:34:09,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545122330] [2021-11-21 01:34:09,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:34:09,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:09,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:09,019 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:09,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 01:34:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:09,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-21 01:34:09,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:09,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 1705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:09,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:11,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 1705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:11,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545122330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:34:11,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [851428949] [2021-11-21 01:34:11,065 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:34:11,065 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:34:11,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:34:11,065 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:34:11,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:34:12,448 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:34:13,332 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:34:13,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:34:13,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2021-11-21 01:34:13,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135195146] [2021-11-21 01:34:13,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:34:13,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-21 01:34:13,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:13,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-21 01:34:13,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2283, Invalid=8223, Unknown=0, NotChecked=0, Total=10506 [2021-11-21 01:34:13,335 INFO L87 Difference]: Start difference. First operand 332 states and 393 transitions. Second operand has 94 states, 93 states have (on average 3.4301075268817205) internal successors, (319), 94 states have internal predecessors, (319), 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 01:34:15,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:15,045 INFO L93 Difference]: Finished difference Result 404 states and 427 transitions. [2021-11-21 01:34:15,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-21 01:34:15,045 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 3.4301075268817205) internal successors, (319), 94 states have internal predecessors, (319), 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 160 [2021-11-21 01:34:15,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:15,048 INFO L225 Difference]: With dead ends: 404 [2021-11-21 01:34:15,049 INFO L226 Difference]: Without dead ends: 403 [2021-11-21 01:34:15,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5364 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5573, Invalid=16479, Unknown=0, NotChecked=0, Total=22052 [2021-11-21 01:34:15,051 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 553 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:15,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 298 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:34:15,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-11-21 01:34:15,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 334. [2021-11-21 01:34:15,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 330 states have (on average 1.1272727272727272) internal successors, (372), 333 states have internal predecessors, (372), 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 01:34:15,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 372 transitions. [2021-11-21 01:34:15,063 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 372 transitions. Word has length 160 [2021-11-21 01:34:15,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:15,064 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 372 transitions. [2021-11-21 01:34:15,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 3.4301075268817205) internal successors, (319), 94 states have internal predecessors, (319), 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 01:34:15,064 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 372 transitions. [2021-11-21 01:34:15,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-21 01:34:15,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:15,066 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 22, 1, 1, 1] [2021-11-21 01:34:15,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:15,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-21 01:34:15,284 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:34:15,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:15,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1999322631, now seen corresponding path program 4 times [2021-11-21 01:34:15,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:15,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520210955] [2021-11-21 01:34:15,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:15,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1771 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:15,624 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:15,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520210955] [2021-11-21 01:34:15,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520210955] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:34:15,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465572445] [2021-11-21 01:34:15,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:34:15,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:15,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:15,625 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:15,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-21 01:34:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:15,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 01:34:15,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1771 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:16,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1771 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:16,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465572445] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:34:16,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2083941470] [2021-11-21 01:34:16,971 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:34:16,971 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:34:16,971 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:34:16,971 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:34:16,971 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:34:18,251 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:34:18,946 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:34:18,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:34:18,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-11-21 01:34:18,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300515051] [2021-11-21 01:34:18,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:34:18,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-21 01:34:18,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:18,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-21 01:34:18,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1152, Invalid=2040, Unknown=0, NotChecked=0, Total=3192 [2021-11-21 01:34:18,948 INFO L87 Difference]: Start difference. First operand 334 states and 372 transitions. Second operand has 48 states, 47 states have (on average 6.914893617021277) internal successors, (325), 48 states have internal predecessors, (325), 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 01:34:19,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:19,118 INFO L93 Difference]: Finished difference Result 383 states and 406 transitions. [2021-11-21 01:34:19,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-21 01:34:19,118 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 6.914893617021277) internal successors, (325), 48 states have internal predecessors, (325), 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 163 [2021-11-21 01:34:19,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:19,120 INFO L225 Difference]: With dead ends: 383 [2021-11-21 01:34:19,120 INFO L226 Difference]: Without dead ends: 382 [2021-11-21 01:34:19,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1152, Invalid=2040, Unknown=0, NotChecked=0, Total=3192 [2021-11-21 01:34:19,121 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:19,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 295 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:34:19,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-21 01:34:19,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 337. [2021-11-21 01:34:19,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 333 states have (on average 1.057057057057057) internal successors, (352), 336 states have internal predecessors, (352), 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 01:34:19,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 352 transitions. [2021-11-21 01:34:19,134 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 352 transitions. Word has length 163 [2021-11-21 01:34:19,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:19,134 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 352 transitions. [2021-11-21 01:34:19,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 6.914893617021277) internal successors, (325), 48 states have internal predecessors, (325), 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 01:34:19,135 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 352 transitions. [2021-11-21 01:34:19,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-21 01:34:19,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:19,136 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1] [2021-11-21 01:34:19,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:19,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-21 01:34:19,342 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:34:19,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:19,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1912944982, now seen corresponding path program 5 times [2021-11-21 01:34:19,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:19,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226903542] [2021-11-21 01:34:19,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:19,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3286 backedges. 0 proven. 3286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:20,681 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:20,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226903542] [2021-11-21 01:34:20,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226903542] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:34:20,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842993190] [2021-11-21 01:34:20,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:34:20,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:20,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:20,682 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:20,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-21 01:34:20,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2021-11-21 01:34:20,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:34:20,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 127 conjunts are in the unsatisfiable core [2021-11-21 01:34:20,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3286 backedges. 0 proven. 3286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:24,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3286 backedges. 0 proven. 3286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:28,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842993190] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:34:29,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1843855496] [2021-11-21 01:34:29,001 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-21 01:34:29,001 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:34:29,001 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:34:29,001 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:34:29,001 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:34:30,691 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:34:31,972 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:34:31,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:34:31,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 95, 95] total 254 [2021-11-21 01:34:31,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113611400] [2021-11-21 01:34:31,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:34:31,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 255 states [2021-11-21 01:34:31,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:31,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 255 interpolants. [2021-11-21 01:34:31,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8917, Invalid=61573, Unknown=0, NotChecked=0, Total=70490 [2021-11-21 01:34:31,982 INFO L87 Difference]: Start difference. First operand 337 states and 352 transitions. Second operand has 255 states, 254 states have (on average 2.6141732283464565) internal successors, (664), 255 states have internal predecessors, (664), 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 01:34:38,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:38,648 INFO L93 Difference]: Finished difference Result 566 states and 597 transitions. [2021-11-21 01:34:38,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2021-11-21 01:34:38,648 INFO L78 Accepts]: Start accepts. Automaton has has 255 states, 254 states have (on average 2.6141732283464565) internal successors, (664), 255 states have internal predecessors, (664), 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 222 [2021-11-21 01:34:38,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:38,651 INFO L225 Difference]: With dead ends: 566 [2021-11-21 01:34:38,651 INFO L226 Difference]: Without dead ends: 501 [2021-11-21 01:34:38,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 404 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75113 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=23602, Invalid=140828, Unknown=0, NotChecked=0, Total=164430 [2021-11-21 01:34:38,662 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1329 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1329 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:38,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1329 Valid, 292 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:34:38,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-11-21 01:34:38,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 450. [2021-11-21 01:34:38,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 446 states have (on average 1.116591928251121) internal successors, (498), 449 states have internal predecessors, (498), 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 01:34:38,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 498 transitions. [2021-11-21 01:34:38,678 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 498 transitions. Word has length 222 [2021-11-21 01:34:38,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:38,678 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 498 transitions. [2021-11-21 01:34:38,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 255 states, 254 states have (on average 2.6141732283464565) internal successors, (664), 255 states have internal predecessors, (664), 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 01:34:38,679 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 498 transitions. [2021-11-21 01:34:38,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-11-21 01:34:38,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:38,681 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 46, 46, 1, 1, 1] [2021-11-21 01:34:38,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:38,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:38,906 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:34:38,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:38,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1045942129, now seen corresponding path program 5 times [2021-11-21 01:34:38,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:38,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568329090] [2021-11-21 01:34:38,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:38,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:41,508 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:41,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568329090] [2021-11-21 01:34:41,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568329090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:34:41,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487450807] [2021-11-21 01:34:41,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:34:41,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:41,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:41,510 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:41,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-21 01:34:41,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-21 01:34:41,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:34:41,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-21 01:34:41,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:42,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7337 backedges. 0 proven. 7337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:48,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487450807] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:34:48,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [842904726] [2021-11-21 01:34:48,525 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:34:48,525 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:34:48,525 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:34:48,525 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:34:48,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:34:50,009 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:34:51,299 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:34:51,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:34:51,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 189 [2021-11-21 01:34:51,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531017911] [2021-11-21 01:34:51,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:34:51,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2021-11-21 01:34:51,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:51,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2021-11-21 01:34:51,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9147, Invalid=30255, Unknown=0, NotChecked=0, Total=39402 [2021-11-21 01:34:51,305 INFO L87 Difference]: Start difference. First operand 450 states and 498 transitions. Second operand has 190 states, 189 states have (on average 3.4444444444444446) internal successors, (651), 190 states have internal predecessors, (651), 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 01:34:57,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:57,236 INFO L93 Difference]: Finished difference Result 857 states and 904 transitions. [2021-11-21 01:34:57,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-11-21 01:34:57,237 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 189 states have (on average 3.4444444444444446) internal successors, (651), 190 states have internal predecessors, (651), 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 326 [2021-11-21 01:34:57,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:57,241 INFO L225 Difference]: With dead ends: 857 [2021-11-21 01:34:57,241 INFO L226 Difference]: Without dead ends: 856 [2021-11-21 01:34:57,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1165 GetRequests, 874 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20006 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=22637, Invalid=62919, Unknown=0, NotChecked=0, Total=85556 [2021-11-21 01:34:57,248 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1737 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1737 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:57,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1737 Valid, 580 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:34:57,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-11-21 01:34:57,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 668. [2021-11-21 01:34:57,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 664 states have (on average 1.194277108433735) internal successors, (793), 667 states have internal predecessors, (793), 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 01:34:57,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 793 transitions. [2021-11-21 01:34:57,270 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 793 transitions. Word has length 326 [2021-11-21 01:34:57,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:57,271 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 793 transitions. [2021-11-21 01:34:57,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 189 states have (on average 3.4444444444444446) internal successors, (651), 190 states have internal predecessors, (651), 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 01:34:57,271 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 793 transitions. [2021-11-21 01:34:57,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-11-21 01:34:57,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:57,273 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 46, 46, 1, 1, 1] [2021-11-21 01:34:57,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-21 01:34:57,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:57,490 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:34:57,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:57,490 INFO L85 PathProgramCache]: Analyzing trace with hash -128037103, now seen corresponding path program 5 times [2021-11-21 01:34:57,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:57,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111486994] [2021-11-21 01:34:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:57,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7429 backedges. 0 proven. 7429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:00,294 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:00,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111486994] [2021-11-21 01:35:00,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111486994] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:35:00,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788276060] [2021-11-21 01:35:00,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:35:00,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:00,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:35:00,296 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:35:00,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-21 01:35:00,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-21 01:35:00,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:35:00,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-21 01:35:00,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7429 backedges. 0 proven. 7429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:01,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7429 backedges. 0 proven. 7429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:07,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788276060] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:07,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1920378017] [2021-11-21 01:35:07,313 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:35:07,313 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:35:07,313 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:35:07,313 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:35:07,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:35:08,684 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:35:09,902 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:35:09,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:35:09,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 189 [2021-11-21 01:35:09,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028232091] [2021-11-21 01:35:09,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:35:09,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2021-11-21 01:35:09,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:09,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2021-11-21 01:35:09,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9147, Invalid=30255, Unknown=0, NotChecked=0, Total=39402 [2021-11-21 01:35:09,909 INFO L87 Difference]: Start difference. First operand 668 states and 793 transitions. Second operand has 190 states, 189 states have (on average 3.4656084656084656) internal successors, (655), 190 states have internal predecessors, (655), 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 01:35:15,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:15,475 INFO L93 Difference]: Finished difference Result 812 states and 859 transitions. [2021-11-21 01:35:15,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-11-21 01:35:15,476 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 189 states have (on average 3.4656084656084656) internal successors, (655), 190 states have internal predecessors, (655), 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 328 [2021-11-21 01:35:15,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:15,481 INFO L225 Difference]: With dead ends: 812 [2021-11-21 01:35:15,481 INFO L226 Difference]: Without dead ends: 811 [2021-11-21 01:35:15,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1171 GetRequests, 880 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20004 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=22637, Invalid=62919, Unknown=0, NotChecked=0, Total=85556 [2021-11-21 01:35:15,485 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1480 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:15,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 536 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:35:15,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-11-21 01:35:15,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 670. [2021-11-21 01:35:15,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 666 states have (on average 1.1231231231231231) internal successors, (748), 669 states have internal predecessors, (748), 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 01:35:15,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 748 transitions. [2021-11-21 01:35:15,507 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 748 transitions. Word has length 328 [2021-11-21 01:35:15,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:15,508 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 748 transitions. [2021-11-21 01:35:15,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 189 states have (on average 3.4656084656084656) internal successors, (655), 190 states have internal predecessors, (655), 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 01:35:15,509 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 748 transitions. [2021-11-21 01:35:15,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-11-21 01:35:15,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:15,511 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 46, 1, 1, 1] [2021-11-21 01:35:15,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:15,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:15,726 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:35:15,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:15,726 INFO L85 PathProgramCache]: Analyzing trace with hash -422322937, now seen corresponding path program 5 times [2021-11-21 01:35:15,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:15,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518300395] [2021-11-21 01:35:15,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:15,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7567 backedges. 0 proven. 7567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:16,856 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:16,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518300395] [2021-11-21 01:35:16,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518300395] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:35:16,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336005628] [2021-11-21 01:35:16,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:35:16,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:16,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:35:16,857 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:35:16,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-21 01:35:17,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-21 01:35:17,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:35:17,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-21 01:35:17,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:17,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7567 backedges. 0 proven. 7567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:17,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7567 backedges. 0 proven. 7567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:20,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336005628] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:20,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2060668484] [2021-11-21 01:35:20,582 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:35:20,582 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:35:20,583 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:35:20,583 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:35:20,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:35:22,079 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:35:22,962 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:35:22,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:35:22,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2021-11-21 01:35:22,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718371002] [2021-11-21 01:35:22,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:35:22,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-21 01:35:22,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:22,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-21 01:35:22,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4584, Invalid=6336, Unknown=0, NotChecked=0, Total=10920 [2021-11-21 01:35:22,968 INFO L87 Difference]: Start difference. First operand 670 states and 748 transitions. Second operand has 96 states, 95 states have (on average 6.957894736842105) internal successors, (661), 96 states have internal predecessors, (661), 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 01:35:23,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:23,397 INFO L93 Difference]: Finished difference Result 767 states and 814 transitions. [2021-11-21 01:35:23,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-21 01:35:23,398 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 6.957894736842105) internal successors, (661), 96 states have internal predecessors, (661), 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 331 [2021-11-21 01:35:23,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:23,402 INFO L225 Difference]: With dead ends: 767 [2021-11-21 01:35:23,402 INFO L226 Difference]: Without dead ends: 766 [2021-11-21 01:35:23,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1039 GetRequests, 936 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4584, Invalid=6336, Unknown=0, NotChecked=0, Total=10920 [2021-11-21 01:35:23,403 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 279 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:23,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 561 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:35:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-11-21 01:35:23,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 673. [2021-11-21 01:35:23,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 669 states have (on average 1.0523168908819134) internal successors, (704), 672 states have internal predecessors, (704), 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 01:35:23,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 704 transitions. [2021-11-21 01:35:23,425 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 704 transitions. Word has length 331 [2021-11-21 01:35:23,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:23,426 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 704 transitions. [2021-11-21 01:35:23,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 6.957894736842105) internal successors, (661), 96 states have internal predecessors, (661), 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 01:35:23,426 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 704 transitions. [2021-11-21 01:35:23,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2021-11-21 01:35:23,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:23,430 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1] [2021-11-21 01:35:23,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:23,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:23,643 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:35:23,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:23,644 INFO L85 PathProgramCache]: Analyzing trace with hash 798352726, now seen corresponding path program 6 times [2021-11-21 01:35:23,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:23,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783956135] [2021-11-21 01:35:23,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:23,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 13734 backedges. 0 proven. 13734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:28,172 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:28,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783956135] [2021-11-21 01:35:28,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783956135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:35:28,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380124369] [2021-11-21 01:35:28,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:35:28,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:28,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:35:28,199 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:35:28,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-21 01:35:28,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:35:28,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:35:28,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 255 conjunts are in the unsatisfiable core [2021-11-21 01:35:28,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:38,990 INFO L134 CoverageAnalysis]: Checked inductivity of 13734 backedges. 0 proven. 13734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:38,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 13734 backedges. 0 proven. 13734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:55,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380124369] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:55,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1467385287] [2021-11-21 01:35:55,170 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-21 01:35:55,170 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:35:55,171 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:35:55,171 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:35:55,171 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:35:56,908 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:35:58,738 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:35:58,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:35:58,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 191, 191] total 510 [2021-11-21 01:35:58,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702041174] [2021-11-21 01:35:58,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:35:58,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 511 states [2021-11-21 01:35:58,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:58,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 511 interpolants. [2021-11-21 01:35:58,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35205, Invalid=236757, Unknown=0, NotChecked=0, Total=271962 [2021-11-21 01:35:58,763 INFO L87 Difference]: Start difference. First operand 673 states and 704 transitions. Second operand has 511 states, 510 states have (on average 2.619607843137255) internal successors, (1336), 511 states have internal predecessors, (1336), 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 01:36:25,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:25,142 INFO L93 Difference]: Finished difference Result 1126 states and 1189 transitions. [2021-11-21 01:36:25,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 413 states. [2021-11-21 01:36:25,142 INFO L78 Accepts]: Start accepts. Automaton has has 511 states, 510 states have (on average 2.619607843137255) internal successors, (1336), 511 states have internal predecessors, (1336), 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 446 [2021-11-21 01:36:25,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:25,147 INFO L225 Difference]: With dead ends: 1126 [2021-11-21 01:36:25,147 INFO L226 Difference]: Without dead ends: 997 [2021-11-21 01:36:25,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1750 GetRequests, 946 SyntacticMatches, 0 SemanticMatches, 804 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298809 ImplicationChecksByTransitivity, 49.9s TimeCoverageRelationStatistics Valid=94274, Invalid=554556, Unknown=0, NotChecked=0, Total=648830 [2021-11-21 01:36:25,182 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 3302 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 1680 mSolverCounterSat, 860 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3302 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 2540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 860 IncrementalHoareTripleChecker+Valid, 1680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:25,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3302 Valid, 521 Invalid, 2540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [860 Valid, 1680 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-21 01:36:25,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-11-21 01:36:25,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 898. [2021-11-21 01:36:25,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 894 states have (on average 1.1118568232662192) internal successors, (994), 897 states have internal predecessors, (994), 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 01:36:25,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 994 transitions. [2021-11-21 01:36:25,208 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 994 transitions. Word has length 446 [2021-11-21 01:36:25,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:25,209 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 994 transitions. [2021-11-21 01:36:25,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 511 states, 510 states have (on average 2.619607843137255) internal successors, (1336), 511 states have internal predecessors, (1336), 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 01:36:25,210 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 994 transitions. [2021-11-21 01:36:25,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2021-11-21 01:36:25,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:25,215 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 94, 94, 94, 94, 94, 1, 1, 1] [2021-11-21 01:36:25,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-21 01:36:25,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:25,426 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:36:25,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:25,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1582903951, now seen corresponding path program 6 times [2021-11-21 01:36:25,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:25,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486417330] [2021-11-21 01:36:25,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:25,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:34,882 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:34,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486417330] [2021-11-21 01:36:34,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486417330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:36:34,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138624075] [2021-11-21 01:36:34,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:36:34,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:34,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:36:34,883 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:36:34,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-21 01:36:35,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:36:35,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:36:35,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 1635 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-21 01:36:35,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:36,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:36:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 30785 backedges. 0 proven. 30785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:59,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138624075] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:36:59,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1104019319] [2021-11-21 01:36:59,944 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:36:59,944 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:36:59,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:36:59,945 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:36:59,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:37:01,445 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:37:03,374 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:37:03,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:37:03,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 381 [2021-11-21 01:37:03,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946237054] [2021-11-21 01:37:03,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:37:03,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 382 states [2021-11-21 01:37:03,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:37:03,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 382 interpolants. [2021-11-21 01:37:03,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36699, Invalid=115791, Unknown=0, NotChecked=0, Total=152490 [2021-11-21 01:37:03,388 INFO L87 Difference]: Start difference. First operand 898 states and 994 transitions. Second operand has 382 states, 381 states have (on average 3.47244094488189) internal successors, (1323), 382 states have internal predecessors, (1323), 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 01:37:30,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:37:30,525 INFO L93 Difference]: Finished difference Result 1721 states and 1816 transitions. [2021-11-21 01:37:30,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 383 states. [2021-11-21 01:37:30,526 INFO L78 Accepts]: Start accepts. Automaton has has 382 states, 381 states have (on average 3.47244094488189) internal successors, (1323), 382 states have internal predecessors, (1323), 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 662 [2021-11-21 01:37:30,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:37:30,533 INFO L225 Difference]: With dead ends: 1721 [2021-11-21 01:37:30,533 INFO L226 Difference]: Without dead ends: 1720 [2021-11-21 01:37:30,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2365 GetRequests, 1786 SyntacticMatches, 0 SemanticMatches, 579 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76934 ImplicationChecksByTransitivity, 48.9s TimeCoverageRelationStatistics Valid=91325, Invalid=245655, Unknown=0, NotChecked=0, Total=336980 [2021-11-21 01:37:30,546 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 4033 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4033 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:37:30,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4033 Valid, 1105 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1133 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 01:37:30,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2021-11-21 01:37:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 1340. [2021-11-21 01:37:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1336 states have (on average 1.1923652694610778) internal successors, (1593), 1339 states have internal predecessors, (1593), 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 01:37:30,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 1593 transitions. [2021-11-21 01:37:30,583 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 1593 transitions. Word has length 662 [2021-11-21 01:37:30,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:37:30,584 INFO L470 AbstractCegarLoop]: Abstraction has 1340 states and 1593 transitions. [2021-11-21 01:37:30,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 382 states, 381 states have (on average 3.47244094488189) internal successors, (1323), 382 states have internal predecessors, (1323), 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 01:37:30,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 1593 transitions. [2021-11-21 01:37:30,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2021-11-21 01:37:30,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:37:30,590 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 94, 94, 94, 94, 1, 1, 1] [2021-11-21 01:37:30,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-21 01:37:30,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-21 01:37:30,806 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:37:30,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:37:30,806 INFO L85 PathProgramCache]: Analyzing trace with hash 752275729, now seen corresponding path program 6 times [2021-11-21 01:37:30,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:37:30,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319035619] [2021-11-21 01:37:30,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:30,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:37:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 30973 backedges. 0 proven. 30973 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:40,171 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:37:40,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319035619] [2021-11-21 01:37:40,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319035619] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:37:40,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095707690] [2021-11-21 01:37:40,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:37:40,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:37:40,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:37:40,172 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:37:40,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-21 01:37:40,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:37:40,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:37:40,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 1641 conjuncts, 191 conjunts are in the unsatisfiable core [2021-11-21 01:37:40,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:37:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 30973 backedges. 0 proven. 30973 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:37:41,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:38:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 30973 backedges. 0 proven. 30973 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:38:05,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095707690] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:38:05,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [708184672] [2021-11-21 01:38:05,185 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:38:05,186 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:38:05,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:38:05,186 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:38:05,186 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:38:06,654 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:38:08,521 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:38:08,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:38:08,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 381 [2021-11-21 01:38:08,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718865026] [2021-11-21 01:38:08,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:38:08,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 382 states [2021-11-21 01:38:08,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:38:08,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 382 interpolants. [2021-11-21 01:38:08,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36699, Invalid=115791, Unknown=0, NotChecked=0, Total=152490 [2021-11-21 01:38:08,539 INFO L87 Difference]: Start difference. First operand 1340 states and 1593 transitions. Second operand has 382 states, 381 states have (on average 3.4829396325459316) internal successors, (1327), 382 states have internal predecessors, (1327), 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 01:38:35,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:38:35,033 INFO L93 Difference]: Finished difference Result 1628 states and 1723 transitions. [2021-11-21 01:38:35,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 383 states. [2021-11-21 01:38:35,034 INFO L78 Accepts]: Start accepts. Automaton has has 382 states, 381 states have (on average 3.4829396325459316) internal successors, (1327), 382 states have internal predecessors, (1327), 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 664 [2021-11-21 01:38:35,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:38:35,042 INFO L225 Difference]: With dead ends: 1628 [2021-11-21 01:38:35,042 INFO L226 Difference]: Without dead ends: 1627 [2021-11-21 01:38:35,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2371 GetRequests, 1792 SyntacticMatches, 0 SemanticMatches, 579 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76932 ImplicationChecksByTransitivity, 48.6s TimeCoverageRelationStatistics Valid=91325, Invalid=245655, Unknown=0, NotChecked=0, Total=336980 [2021-11-21 01:38:35,065 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 3630 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3630 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:38:35,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3630 Valid, 992 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 01:38:35,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-11-21 01:38:35,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1342. [2021-11-21 01:38:35,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1338 states have (on average 1.1210762331838564) internal successors, (1500), 1341 states have internal predecessors, (1500), 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 01:38:35,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 1500 transitions. [2021-11-21 01:38:35,103 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 1500 transitions. Word has length 664 [2021-11-21 01:38:35,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:38:35,104 INFO L470 AbstractCegarLoop]: Abstraction has 1342 states and 1500 transitions. [2021-11-21 01:38:35,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 382 states, 381 states have (on average 3.4829396325459316) internal successors, (1327), 382 states have internal predecessors, (1327), 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 01:38:35,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 1500 transitions. [2021-11-21 01:38:35,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2021-11-21 01:38:35,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:38:35,111 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 95, 94, 1, 1, 1] [2021-11-21 01:38:35,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-21 01:38:35,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-21 01:38:35,338 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:38:35,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:38:35,338 INFO L85 PathProgramCache]: Analyzing trace with hash -93054201, now seen corresponding path program 6 times [2021-11-21 01:38:35,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:38:35,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069376632] [2021-11-21 01:38:35,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:38:35,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:38:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:38:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 31255 backedges. 0 proven. 31255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:38:39,110 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:38:39,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069376632] [2021-11-21 01:38:39,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069376632] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:38:39,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676605650] [2021-11-21 01:38:39,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:38:39,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:38:39,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:38:39,114 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:38:39,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-21 01:38:39,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:38:39,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:38:39,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 1646 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-21 01:38:39,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:38:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 31255 backedges. 0 proven. 31255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:38:40,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:38:50,550 INFO L134 CoverageAnalysis]: Checked inductivity of 31255 backedges. 0 proven. 31255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:38:50,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676605650] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:38:50,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [431779240] [2021-11-21 01:38:50,551 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-21 01:38:50,551 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:38:50,552 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:38:50,552 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:38:50,552 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:38:52,070 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:38:53,294 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:38:53,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:38:53,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2021-11-21 01:38:53,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450468466] [2021-11-21 01:38:53,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:38:53,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-11-21 01:38:53,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:38:53,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-11-21 01:38:53,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18360, Invalid=21840, Unknown=0, NotChecked=0, Total=40200 [2021-11-21 01:38:53,306 INFO L87 Difference]: Start difference. First operand 1342 states and 1500 transitions. Second operand has 192 states, 191 states have (on average 6.979057591623037) internal successors, (1333), 192 states have internal predecessors, (1333), 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 01:38:55,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:38:55,105 INFO L93 Difference]: Finished difference Result 1535 states and 1630 transitions. [2021-11-21 01:38:55,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-21 01:38:55,106 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 191 states have (on average 6.979057591623037) internal successors, (1333), 192 states have internal predecessors, (1333), 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 667 [2021-11-21 01:38:55,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:38:55,112 INFO L225 Difference]: With dead ends: 1535 [2021-11-21 01:38:55,112 INFO L226 Difference]: Without dead ends: 1534 [2021-11-21 01:38:55,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2095 GetRequests, 1896 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=18360, Invalid=21840, Unknown=0, NotChecked=0, Total=40200 [2021-11-21 01:38:55,114 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 867 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:38:55,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 1107 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:38:55,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-11-21 01:38:55,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1345. [2021-11-21 01:38:55,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1341 states have (on average 1.0499627143922445) internal successors, (1408), 1344 states have internal predecessors, (1408), 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 01:38:55,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1408 transitions. [2021-11-21 01:38:55,153 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1408 transitions. Word has length 667 [2021-11-21 01:38:55,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:38:55,154 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 1408 transitions. [2021-11-21 01:38:55,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 191 states have (on average 6.979057591623037) internal successors, (1333), 192 states have internal predecessors, (1333), 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 01:38:55,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1408 transitions. [2021-11-21 01:38:55,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 895 [2021-11-21 01:38:55,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:38:55,163 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 127, 127, 127, 127, 1, 1, 1, 1, 1] [2021-11-21 01:38:55,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-21 01:38:55,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:38:55,382 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:38:55,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:38:55,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1262959958, now seen corresponding path program 7 times [2021-11-21 01:38:55,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:38:55,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333698800] [2021-11-21 01:38:55,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:38:55,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:38:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 56134 backedges. 0 proven. 56134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:39:12,207 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:39:12,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333698800] [2021-11-21 01:39:12,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333698800] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:39:12,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171840477] [2021-11-21 01:39:12,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:39:12,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:39:12,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:39:12,210 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:39:12,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-21 01:39:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:39:12,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 2197 conjuncts, 511 conjunts are in the unsatisfiable core [2021-11-21 01:39:12,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:39:50,388 INFO L134 CoverageAnalysis]: Checked inductivity of 56134 backedges. 0 proven. 56134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:39:50,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:40:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 56134 backedges. 0 proven. 56134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:40:52,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171840477] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:40:52,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1488257343] [2021-11-21 01:40:52,798 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-21 01:40:52,798 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:40:52,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:40:52,798 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:40:52,799 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:40:54,625 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:40:57,690 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:40:57,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:40:57,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [258, 383, 383] total 1022 [2021-11-21 01:40:57,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673339346] [2021-11-21 01:40:57,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:40:57,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 1023 states [2021-11-21 01:40:57,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:40:57,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1023 interpolants. [2021-11-21 01:40:57,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140005, Invalid=928117, Unknown=0, NotChecked=0, Total=1068122 [2021-11-21 01:40:57,754 INFO L87 Difference]: Start difference. First operand 1345 states and 1408 transitions. Second operand has 1023 states, 1022 states have (on average 2.6223091976516635) internal successors, (2680), 1023 states have internal predecessors, (2680), 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 01:43:41,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:43:41,036 INFO L93 Difference]: Finished difference Result 2246 states and 2373 transitions. [2021-11-21 01:43:41,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 829 states. [2021-11-21 01:43:41,038 INFO L78 Accepts]: Start accepts. Automaton has has 1023 states, 1022 states have (on average 2.6223091976516635) internal successors, (2680), 1023 states have internal predecessors, (2680), 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 894 [2021-11-21 01:43:41,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:43:41,051 INFO L225 Difference]: With dead ends: 2246 [2021-11-21 01:43:41,051 INFO L226 Difference]: Without dead ends: 1989 [2021-11-21 01:43:41,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3510 GetRequests, 1906 SyntacticMatches, 0 SemanticMatches, 1604 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191641 ImplicationChecksByTransitivity, 198.5s TimeCoverageRelationStatistics Valid=376930, Invalid=2200700, Unknown=0, NotChecked=0, Total=2577630 [2021-11-21 01:43:41,244 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 7648 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 3280 mSolverCounterSat, 2185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7648 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 5465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2185 IncrementalHoareTripleChecker+Valid, 3280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:43:41,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7648 Valid, 995 Invalid, 5465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2185 Valid, 3280 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-21 01:43:41,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1989 states. [2021-11-21 01:43:41,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1989 to 1794. [2021-11-21 01:43:41,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1790 states have (on average 1.1094972067039106) internal successors, (1986), 1793 states have internal predecessors, (1986), 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 01:43:41,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 1986 transitions. [2021-11-21 01:43:41,295 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 1986 transitions. Word has length 894 [2021-11-21 01:43:41,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:43:41,296 INFO L470 AbstractCegarLoop]: Abstraction has 1794 states and 1986 transitions. [2021-11-21 01:43:41,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 1023 states, 1022 states have (on average 2.6223091976516635) internal successors, (2680), 1023 states have internal predecessors, (2680), 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 01:43:41,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 1986 transitions. [2021-11-21 01:43:41,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1335 [2021-11-21 01:43:41,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:43:41,315 INFO L514 BasicCegarLoop]: trace histogram [191, 190, 190, 190, 190, 190, 190, 1, 1, 1] [2021-11-21 01:43:41,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-21 01:43:41,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a736cb8b-2275-4c43-80ad-3138f8eba3bd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-21 01:43:41,542 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-21 01:43:41,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:43:41,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1392560497, now seen corresponding path program 7 times [2021-11-21 01:43:41,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:43:41,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619043856] [2021-11-21 01:43:41,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:43:41,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:43:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat