./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark13_conjunctive.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark13_conjunctive.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cf06395da4b8f86107f4d086333b3a12be01d6e25ea5b5133d532da24fef3f46 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:59:00,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:59:00,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:59:00,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:59:00,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:59:00,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:59:00,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:59:00,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:59:00,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:59:00,540 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:59:00,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:59:00,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:59:00,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:59:00,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:59:00,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:59:00,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:59:00,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:59:00,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:59:00,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:59:00,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:59:00,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:59:00,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:59:00,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:59:00,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:59:00,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:59:00,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:59:00,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:59:00,580 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:59:00,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:59:00,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:59:00,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:59:00,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:59:00,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:59:00,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:59:00,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:59:00,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:59:00,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:59:00,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:59:00,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:59:00,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:59:00,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:59:00,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/config/svcomp-Overflow-32bit-Taipan_Default.epf [2021-11-25 19:59:00,615 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:59:00,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:59:00,616 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:59:00,616 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:59:00,616 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:59:00,617 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:59:00,617 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:59:00,617 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:59:00,617 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:59:00,617 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:59:00,618 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:59:00,618 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:59:00,618 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:59:00,618 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:59:00,618 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:59:00,619 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:59:00,619 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:59:00,619 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:59:00,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:59:00,620 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:59:00,620 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 19:59:00,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:59:00,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:59:00,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:59:00,621 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:59:00,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:59:00,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:59:00,622 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-25 19:59:00,622 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:59:00,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:59:00,622 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:59:00,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:59:00,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:59:00,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:59:00,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:59:00,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:59:00,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:59:00,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:59:00,624 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:59:00,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:59:00,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:59:00,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:59:00,625 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:59:00,625 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_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf06395da4b8f86107f4d086333b3a12be01d6e25ea5b5133d532da24fef3f46 [2021-11-25 19:59:00,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:59:00,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:59:00,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:59:00,928 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:59:00,929 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:59:00,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/loop-zilu/benchmark13_conjunctive.i [2021-11-25 19:59:01,003 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/data/4003e4cd2/fb9f815b17ae4c429ad82e372912fc84/FLAGbb4993504 [2021-11-25 19:59:01,528 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:59:01,529 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/sv-benchmarks/c/loop-zilu/benchmark13_conjunctive.i [2021-11-25 19:59:01,536 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/data/4003e4cd2/fb9f815b17ae4c429ad82e372912fc84/FLAGbb4993504 [2021-11-25 19:59:01,884 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/data/4003e4cd2/fb9f815b17ae4c429ad82e372912fc84 [2021-11-25 19:59:01,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:59:01,888 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:59:01,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:59:01,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:59:01,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:59:01,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:59:01" (1/1) ... [2021-11-25 19:59:01,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41a33840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:01, skipping insertion in model container [2021-11-25 19:59:01,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:59:01" (1/1) ... [2021-11-25 19:59:01,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:59:01,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:59:02,112 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_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/sv-benchmarks/c/loop-zilu/benchmark13_conjunctive.i[873,886] [2021-11-25 19:59:02,120 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:59:02,129 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:59:02,141 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_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/sv-benchmarks/c/loop-zilu/benchmark13_conjunctive.i[873,886] [2021-11-25 19:59:02,144 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:59:02,156 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:59:02,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:02 WrapperNode [2021-11-25 19:59:02,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:59:02,158 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:59:02,158 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:59:02,159 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:59:02,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:02" (1/1) ... [2021-11-25 19:59:02,173 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:02" (1/1) ... [2021-11-25 19:59:02,192 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 39 [2021-11-25 19:59:02,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:59:02,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:59:02,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:59:02,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:59:02,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:02" (1/1) ... [2021-11-25 19:59:02,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:02" (1/1) ... [2021-11-25 19:59:02,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:02" (1/1) ... [2021-11-25 19:59:02,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:02" (1/1) ... [2021-11-25 19:59:02,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:02" (1/1) ... [2021-11-25 19:59:02,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:02" (1/1) ... [2021-11-25 19:59:02,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:02" (1/1) ... [2021-11-25 19:59:02,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:59:02,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:59:02,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:59:02,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:59:02,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:02" (1/1) ... [2021-11-25 19:59:02,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:59:02,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:02,253 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:59:02,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:59:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:59:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:59:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:59:02,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:59:02,376 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:59:02,378 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:59:02,563 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:59:02,585 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:59:02,586 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:59:02,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:59:02 BoogieIcfgContainer [2021-11-25 19:59:02,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:59:02,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:59:02,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:59:02,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:59:02,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:59:01" (1/3) ... [2021-11-25 19:59:02,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b1366a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:59:02, skipping insertion in model container [2021-11-25 19:59:02,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:59:02" (2/3) ... [2021-11-25 19:59:02,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b1366a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:59:02, skipping insertion in model container [2021-11-25 19:59:02,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:59:02" (3/3) ... [2021-11-25 19:59:02,598 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark13_conjunctive.i [2021-11-25 19:59:02,604 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:59:02,604 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-25 19:59:02,672 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:59:02,678 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:59:02,678 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-25 19:59:02,693 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 8 states have (on average 1.75) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:02,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 19:59:02,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:02,700 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 19:59:02,700 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:59:02,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:02,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2092610, now seen corresponding path program 1 times [2021-11-25 19:59:02,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:02,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390145210] [2021-11-25 19:59:02,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:02,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:02,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:02,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390145210] [2021-11-25 19:59:02,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390145210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:02,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:59:02,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:59:02,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316601415] [2021-11-25 19:59:02,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:02,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:59:02,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:02,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:59:02,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:59:02,925 INFO L87 Difference]: Start difference. First operand has 13 states, 8 states have (on average 1.75) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 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) [2021-11-25 19:59:02,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:02,990 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-11-25 19:59:02,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:59:02,993 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 [2021-11-25 19:59:02,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:03,002 INFO L225 Difference]: With dead ends: 20 [2021-11-25 19:59:03,002 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 19:59:03,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:59:03,010 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:03,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 20 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:59:03,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 19:59:03,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2021-11-25 19:59:03,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:03,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-11-25 19:59:03,062 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 4 [2021-11-25 19:59:03,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:03,062 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-11-25 19:59:03,063 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) [2021-11-25 19:59:03,063 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-11-25 19:59:03,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 19:59:03,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:03,064 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 19:59:03,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:59:03,064 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:59:03,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:03,065 INFO L85 PathProgramCache]: Analyzing trace with hash 64870960, now seen corresponding path program 1 times [2021-11-25 19:59:03,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:03,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269851948] [2021-11-25 19:59:03,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:03,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:03,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:03,143 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:03,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269851948] [2021-11-25 19:59:03,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269851948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:03,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:59:03,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:59:03,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82163574] [2021-11-25 19:59:03,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:03,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:59:03,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:03,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:59:03,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:59:03,155 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:03,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:03,205 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-11-25 19:59:03,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:59:03,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-25 19:59:03,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:03,207 INFO L225 Difference]: With dead ends: 13 [2021-11-25 19:59:03,207 INFO L226 Difference]: Without dead ends: 12 [2021-11-25 19:59:03,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:59:03,209 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:03,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 10 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:59:03,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-25 19:59:03,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-25 19:59:03,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-11-25 19:59:03,215 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 5 [2021-11-25 19:59:03,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:03,215 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-11-25 19:59:03,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:03,215 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-11-25 19:59:03,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 19:59:03,216 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:03,216 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 19:59:03,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:59:03,217 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:59:03,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:03,218 INFO L85 PathProgramCache]: Analyzing trace with hash 2010999812, now seen corresponding path program 1 times [2021-11-25 19:59:03,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:03,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824852885] [2021-11-25 19:59:03,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:03,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:03,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:03,278 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:03,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824852885] [2021-11-25 19:59:03,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824852885] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:03,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:59:03,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:59:03,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490297851] [2021-11-25 19:59:03,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:03,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:59:03,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:03,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:59:03,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:59:03,294 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 3 states, 2 states have (on average 3.0) 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) [2021-11-25 19:59:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:03,310 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2021-11-25 19:59:03,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:59:03,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 [2021-11-25 19:59:03,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:03,311 INFO L225 Difference]: With dead ends: 16 [2021-11-25 19:59:03,311 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 19:59:03,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:59:03,314 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:03,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:59:03,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 19:59:03,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-11-25 19:59:03,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:03,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-11-25 19:59:03,319 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 6 [2021-11-25 19:59:03,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:03,320 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-11-25 19:59:03,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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) [2021-11-25 19:59:03,320 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-11-25 19:59:03,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:59:03,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:03,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:03,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:59:03,340 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:59:03,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:03,341 INFO L85 PathProgramCache]: Analyzing trace with hash -2083515214, now seen corresponding path program 1 times [2021-11-25 19:59:03,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:03,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660921333] [2021-11-25 19:59:03,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:03,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:03,416 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:03,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660921333] [2021-11-25 19:59:03,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660921333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:03,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:59:03,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-25 19:59:03,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634581679] [2021-11-25 19:59:03,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:03,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:59:03,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:03,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:59:03,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:59:03,420 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:03,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:03,431 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-11-25 19:59:03,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:59:03,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 19:59:03,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:03,433 INFO L225 Difference]: With dead ends: 14 [2021-11-25 19:59:03,433 INFO L226 Difference]: Without dead ends: 13 [2021-11-25 19:59:03,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:59:03,435 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:03,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:59:03,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-25 19:59:03,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-25 19:59:03,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:03,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-11-25 19:59:03,441 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 7 [2021-11-25 19:59:03,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:03,442 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-11-25 19:59:03,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:03,442 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-11-25 19:59:03,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:59:03,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:03,443 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:03,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:59:03,443 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:59:03,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:03,444 INFO L85 PathProgramCache]: Analyzing trace with hash -803359244, now seen corresponding path program 1 times [2021-11-25 19:59:03,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:03,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692604807] [2021-11-25 19:59:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:03,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:03,561 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:03,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692604807] [2021-11-25 19:59:03,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692604807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:03,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133550506] [2021-11-25 19:59:03,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:03,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:03,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:03,565 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:03,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:59:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:03,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:59:03,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:03,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:59:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:03,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133550506] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:59:03,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1499228406] [2021-11-25 19:59:03,797 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:59:03,797 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:59:03,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:59:03,813 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:59:03,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:59:04,345 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:59:05,271 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '225#(and (<= 1 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (= |ULTIMATE.start_main_#t~post4#1| |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~k~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:59:05,271 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:59:05,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:59:05,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-25 19:59:05,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916407511] [2021-11-25 19:59:05,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:59:05,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 19:59:05,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:05,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 19:59:05,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:59:05,274 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:05,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:05,375 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-11-25 19:59:05,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:59:05,376 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 19:59:05,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:05,377 INFO L225 Difference]: With dead ends: 30 [2021-11-25 19:59:05,377 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 19:59:05,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:59:05,380 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:05,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:59:05,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 19:59:05,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-11-25 19:59:05,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 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) [2021-11-25 19:59:05,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-11-25 19:59:05,387 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 9 [2021-11-25 19:59:05,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:05,387 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-11-25 19:59:05,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:05,388 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-11-25 19:59:05,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 19:59:05,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:05,388 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 19:59:05,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:05,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:05,589 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:59:05,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:05,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1065881398, now seen corresponding path program 1 times [2021-11-25 19:59:05,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:05,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960688924] [2021-11-25 19:59:05,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:05,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:05,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:05,653 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:05,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960688924] [2021-11-25 19:59:05,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960688924] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:05,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565594317] [2021-11-25 19:59:05,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:05,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:05,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:05,656 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:05,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:59:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:05,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:59:05,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:05,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:59:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:05,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565594317] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:59:05,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [715222687] [2021-11-25 19:59:05,799 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:59:05,799 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:59:05,799 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:59:05,800 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:59:05,800 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:59:06,057 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:59:06,690 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '372#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (< 2147483646 |ULTIMATE.start_main_~j~0#1|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:59:06,690 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:59:06,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:59:06,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-25 19:59:06,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859570535] [2021-11-25 19:59:06,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:59:06,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:59:06,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:06,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:59:06,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:59:06,692 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 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) [2021-11-25 19:59:06,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:06,727 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-11-25 19:59:06,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:59:06,728 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 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 [2021-11-25 19:59:06,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:06,731 INFO L225 Difference]: With dead ends: 29 [2021-11-25 19:59:06,731 INFO L226 Difference]: Without dead ends: 28 [2021-11-25 19:59:06,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:59:06,737 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:06,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 22 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:59:06,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-25 19:59:06,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-25 19:59:06,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.0769230769230769) 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) [2021-11-25 19:59:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-11-25 19:59:06,748 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 11 [2021-11-25 19:59:06,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:06,749 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-11-25 19:59:06,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 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) [2021-11-25 19:59:06,750 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-11-25 19:59:06,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 19:59:06,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:06,752 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1] [2021-11-25 19:59:06,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:06,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:06,969 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:59:06,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:06,970 INFO L85 PathProgramCache]: Analyzing trace with hash 291495106, now seen corresponding path program 2 times [2021-11-25 19:59:06,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:06,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618196612] [2021-11-25 19:59:06,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:06,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:07,141 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:07,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618196612] [2021-11-25 19:59:07,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618196612] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:07,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101781250] [2021-11-25 19:59:07,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:59:07,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:07,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:07,144 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:07,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:59:07,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 19:59:07,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:59:07,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:59:07,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:07,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:59:07,469 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:07,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101781250] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:59:07,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1961604643] [2021-11-25 19:59:07,474 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:59:07,474 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:59:07,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:59:07,475 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:59:07,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:59:07,695 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:59:08,391 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '606#(and (<= 1 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (= |ULTIMATE.start_main_#t~post4#1| |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~k~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:59:08,392 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:59:08,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:59:08,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2021-11-25 19:59:08,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633778917] [2021-11-25 19:59:08,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:59:08,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-25 19:59:08,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:08,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-25 19:59:08,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-11-25 19:59:08,394 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:08,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:08,616 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2021-11-25 19:59:08,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 19:59:08,616 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-25 19:59:08,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:08,618 INFO L225 Difference]: With dead ends: 63 [2021-11-25 19:59:08,618 INFO L226 Difference]: Without dead ends: 62 [2021-11-25 19:59:08,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=330, Invalid=1152, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 19:59:08,619 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 59 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:08,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 50 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:59:08,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-25 19:59:08,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2021-11-25 19:59:08,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 55 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:08,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-11-25 19:59:08,627 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 24 [2021-11-25 19:59:08,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:08,628 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-11-25 19:59:08,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:08,628 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-11-25 19:59:08,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 19:59:08,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:08,629 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1] [2021-11-25 19:59:08,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:08,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:08,860 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:59:08,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:08,860 INFO L85 PathProgramCache]: Analyzing trace with hash 953924228, now seen corresponding path program 2 times [2021-11-25 19:59:08,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:08,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736833732] [2021-11-25 19:59:08,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:08,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:08,939 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:08,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736833732] [2021-11-25 19:59:08,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736833732] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:08,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239000294] [2021-11-25 19:59:08,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:59:08,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:08,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:08,956 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:08,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:59:09,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 19:59:09,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:59:09,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:59:09,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:09,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:59:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:09,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239000294] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:59:09,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [27027076] [2021-11-25 19:59:09,145 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:59:09,145 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:59:09,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:59:09,146 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:59:09,146 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:59:09,322 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:59:09,641 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '936#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (< 2147483646 |ULTIMATE.start_main_~j~0#1|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:59:09,641 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:59:09,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:59:09,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-25 19:59:09,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622437914] [2021-11-25 19:59:09,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:59:09,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:59:09,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:09,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:59:09,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-11-25 19:59:09,643 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 12 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) [2021-11-25 19:59:09,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:09,688 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-11-25 19:59:09,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 19:59:09,688 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-25 19:59:09,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:09,689 INFO L225 Difference]: With dead ends: 59 [2021-11-25 19:59:09,689 INFO L226 Difference]: Without dead ends: 58 [2021-11-25 19:59:09,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-11-25 19:59:09,691 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:09,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 37 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:59:09,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-25 19:59:09,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-25 19:59:09,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 57 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:09,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-11-25 19:59:09,698 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 26 [2021-11-25 19:59:09,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:09,699 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-11-25 19:59:09,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 12 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) [2021-11-25 19:59:09,699 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-11-25 19:59:09,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 19:59:09,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:09,701 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1] [2021-11-25 19:59:09,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:09,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:09,918 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:59:09,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:09,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1862645118, now seen corresponding path program 3 times [2021-11-25 19:59:09,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:09,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309206525] [2021-11-25 19:59:09,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:09,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:10,183 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:10,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309206525] [2021-11-25 19:59:10,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309206525] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:10,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794877306] [2021-11-25 19:59:10,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:59:10,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:10,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:10,187 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:10,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:59:10,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:59:10,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:59:10,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 19:59:10,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:10,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:59:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:10,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794877306] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:59:10,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [385664743] [2021-11-25 19:59:10,970 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:59:10,970 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:59:10,971 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:59:10,971 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:59:10,971 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:59:11,141 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:59:11,925 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1446#(and (<= 1 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (= |ULTIMATE.start_main_#t~post4#1| |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~k~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:59:11,925 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:59:11,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:59:11,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2021-11-25 19:59:11,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773115337] [2021-11-25 19:59:11,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:59:11,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-25 19:59:11,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:11,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-25 19:59:11,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=2182, Unknown=0, NotChecked=0, Total=2756 [2021-11-25 19:59:11,929 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 46 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 46 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:12,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:12,509 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2021-11-25 19:59:12,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-25 19:59:12,510 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 46 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-25 19:59:12,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:12,511 INFO L225 Difference]: With dead ends: 129 [2021-11-25 19:59:12,512 INFO L226 Difference]: Without dead ends: 128 [2021-11-25 19:59:12,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1356, Invalid=4194, Unknown=0, NotChecked=0, Total=5550 [2021-11-25 19:59:12,515 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 233 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:12,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 76 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:59:12,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-25 19:59:12,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2021-11-25 19:59:12,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 114 states have (on average 1.1140350877192982) internal successors, (127), 115 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:12,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 127 transitions. [2021-11-25 19:59:12,526 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 127 transitions. Word has length 54 [2021-11-25 19:59:12,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:12,527 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 127 transitions. [2021-11-25 19:59:12,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 46 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:12,528 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 127 transitions. [2021-11-25 19:59:12,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 19:59:12,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:12,529 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1] [2021-11-25 19:59:12,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:12,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-25 19:59:12,740 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:59:12,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:12,740 INFO L85 PathProgramCache]: Analyzing trace with hash 999405636, now seen corresponding path program 3 times [2021-11-25 19:59:12,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:12,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051710668] [2021-11-25 19:59:12,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:12,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:12,859 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:12,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051710668] [2021-11-25 19:59:12,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051710668] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:12,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816455395] [2021-11-25 19:59:12,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:59:12,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:12,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:12,861 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:12,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:59:12,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:59:12,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:59:12,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:59:12,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:13,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:59:13,349 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:13,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816455395] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:59:13,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [112297714] [2021-11-25 19:59:13,351 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:59:13,351 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:59:13,352 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:59:13,352 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:59:13,352 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:59:13,531 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:59:13,852 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2142#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (< 2147483646 |ULTIMATE.start_main_~j~0#1|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:59:13,852 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:59:13,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:59:13,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-11-25 19:59:13,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699752130] [2021-11-25 19:59:13,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:59:13,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 19:59:13,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:13,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 19:59:13,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-11-25 19:59:13,855 INFO L87 Difference]: Start difference. First operand 116 states and 127 transitions. Second operand has 24 states, 23 states have (on average 4.826086956521739) internal successors, (111), 24 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:13,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:13,949 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2021-11-25 19:59:13,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 19:59:13,949 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.826086956521739) internal successors, (111), 24 states have internal predecessors, (111), 0 states have call successors, (0), 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 56 [2021-11-25 19:59:13,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:13,951 INFO L225 Difference]: With dead ends: 119 [2021-11-25 19:59:13,951 INFO L226 Difference]: Without dead ends: 118 [2021-11-25 19:59:13,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-11-25 19:59:13,952 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 22 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:13,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 76 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:59:13,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-25 19:59:13,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-11-25 19:59:13,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 117 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:13,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2021-11-25 19:59:13,966 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 56 [2021-11-25 19:59:13,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:13,967 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2021-11-25 19:59:13,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.826086956521739) internal successors, (111), 24 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:13,968 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2021-11-25 19:59:13,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-25 19:59:13,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:13,976 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1] [2021-11-25 19:59:14,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:14,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 19:59:14,177 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:59:14,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:14,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1927842302, now seen corresponding path program 4 times [2021-11-25 19:59:14,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:14,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300960197] [2021-11-25 19:59:14,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:14,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:14,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:15,022 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:15,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300960197] [2021-11-25 19:59:15,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300960197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:15,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697532915] [2021-11-25 19:59:15,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:59:15,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:15,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:15,036 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:15,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:59:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:15,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-25 19:59:15,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:15,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:15,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:59:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:17,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697532915] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:59:17,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [830056082] [2021-11-25 19:59:17,302 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:59:17,302 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:59:17,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:59:17,303 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:59:17,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:59:17,467 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:59:18,343 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3204#(and (<= 1 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (= |ULTIMATE.start_main_#t~post4#1| |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~k~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:59:18,344 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:59:18,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:59:18,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2021-11-25 19:59:18,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830749963] [2021-11-25 19:59:18,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:59:18,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-25 19:59:18,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:18,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-25 19:59:18,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=7822, Unknown=0, NotChecked=0, Total=10100 [2021-11-25 19:59:18,352 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand has 94 states, 93 states have (on average 2.4408602150537635) internal successors, (227), 94 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:20,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:20,213 INFO L93 Difference]: Finished difference Result 261 states and 284 transitions. [2021-11-25 19:59:20,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-25 19:59:20,214 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 2.4408602150537635) internal successors, (227), 94 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-25 19:59:20,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:20,216 INFO L225 Difference]: With dead ends: 261 [2021-11-25 19:59:20,217 INFO L226 Difference]: Without dead ends: 260 [2021-11-25 19:59:20,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5089 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5568, Invalid=15894, Unknown=0, NotChecked=0, Total=21462 [2021-11-25 19:59:20,234 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 440 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:20,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 147 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:59:20,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-25 19:59:20,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 236. [2021-11-25 19:59:20,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 234 states have (on average 1.106837606837607) internal successors, (259), 235 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:20,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 259 transitions. [2021-11-25 19:59:20,253 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 259 transitions. Word has length 114 [2021-11-25 19:59:20,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:20,254 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 259 transitions. [2021-11-25 19:59:20,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 2.4408602150537635) internal successors, (227), 94 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:20,254 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 259 transitions. [2021-11-25 19:59:20,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-25 19:59:20,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:20,257 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1] [2021-11-25 19:59:20,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:20,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:20,468 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:59:20,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:20,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1525546044, now seen corresponding path program 4 times [2021-11-25 19:59:20,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:20,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306557675] [2021-11-25 19:59:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:20,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:20,814 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:20,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306557675] [2021-11-25 19:59:20,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306557675] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:20,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607910796] [2021-11-25 19:59:20,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:59:20,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:20,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:20,817 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:20,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:59:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:20,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 19:59:20,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:21,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:59:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:21,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607910796] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:59:21,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [790873320] [2021-11-25 19:59:21,885 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:59:21,885 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:59:21,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:59:21,886 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:59:21,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:59:22,038 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:59:22,597 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4632#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (< 2147483646 |ULTIMATE.start_main_~j~0#1|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:59:22,597 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:59:22,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:59:22,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-11-25 19:59:22,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102284412] [2021-11-25 19:59:22,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:59:22,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 19:59:22,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:22,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 19:59:22,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1148, Invalid=1822, Unknown=0, NotChecked=0, Total=2970 [2021-11-25 19:59:22,601 INFO L87 Difference]: Start difference. First operand 236 states and 259 transitions. Second operand has 48 states, 47 states have (on average 4.914893617021277) internal successors, (231), 48 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:22,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:22,745 INFO L93 Difference]: Finished difference Result 239 states and 262 transitions. [2021-11-25 19:59:22,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-25 19:59:22,746 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.914893617021277) internal successors, (231), 48 states have internal predecessors, (231), 0 states have call successors, (0), 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 116 [2021-11-25 19:59:22,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:22,748 INFO L225 Difference]: With dead ends: 239 [2021-11-25 19:59:22,748 INFO L226 Difference]: Without dead ends: 238 [2021-11-25 19:59:22,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1148, Invalid=1822, Unknown=0, NotChecked=0, Total=2970 [2021-11-25 19:59:22,750 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 69 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:22,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 149 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:59:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-25 19:59:22,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2021-11-25 19:59:22,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 236 states have (on average 1.0084745762711864) internal successors, (238), 237 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:22,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2021-11-25 19:59:22,767 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 116 [2021-11-25 19:59:22,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:22,768 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2021-11-25 19:59:22,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.914893617021277) internal successors, (231), 48 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:22,768 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2021-11-25 19:59:22,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-25 19:59:22,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:22,773 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1] [2021-11-25 19:59:22,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:22,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:22,987 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:59:22,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:22,988 INFO L85 PathProgramCache]: Analyzing trace with hash 33754370, now seen corresponding path program 5 times [2021-11-25 19:59:22,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:22,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809701209] [2021-11-25 19:59:22,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:22,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:25,732 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:25,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809701209] [2021-11-25 19:59:25,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809701209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:25,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735679379] [2021-11-25 19:59:25,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:59:25,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:25,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:25,733 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:25,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:59:25,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-25 19:59:25,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:59:25,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-25 19:59:25,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:26,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:59:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:32,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735679379] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:59:32,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1730790159] [2021-11-25 19:59:32,728 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:59:32,729 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:59:32,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:59:32,729 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:59:32,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:59:32,877 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:59:33,973 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6798#(and (<= 1 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (= |ULTIMATE.start_main_#t~post4#1| |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~k~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:59:33,973 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:59:33,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:59:33,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 189 [2021-11-25 19:59:33,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473285330] [2021-11-25 19:59:33,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:59:33,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2021-11-25 19:59:33,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:33,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2021-11-25 19:59:33,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9142, Invalid=29470, Unknown=0, NotChecked=0, Total=38612 [2021-11-25 19:59:33,982 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand has 190 states, 189 states have (on average 2.4708994708994707) internal successors, (467), 190 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:39,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:39,430 INFO L93 Difference]: Finished difference Result 525 states and 572 transitions. [2021-11-25 19:59:39,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-11-25 19:59:39,432 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 189 states have (on average 2.4708994708994707) internal successors, (467), 190 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2021-11-25 19:59:39,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:39,435 INFO L225 Difference]: With dead ends: 525 [2021-11-25 19:59:39,435 INFO L226 Difference]: Without dead ends: 524 [2021-11-25 19:59:39,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 889 GetRequests, 600 SyntacticMatches, 0 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19441 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=22632, Invalid=61758, Unknown=0, NotChecked=0, Total=84390 [2021-11-25 19:59:39,445 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 1178 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:39,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1178 Valid, 275 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:59:39,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-11-25 19:59:39,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 476. [2021-11-25 19:59:39,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 474 states have (on average 1.1033755274261603) internal successors, (523), 475 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:39,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 523 transitions. [2021-11-25 19:59:39,468 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 523 transitions. Word has length 234 [2021-11-25 19:59:39,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:39,469 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 523 transitions. [2021-11-25 19:59:39,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 189 states have (on average 2.4708994708994707) internal successors, (467), 190 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:39,470 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 523 transitions. [2021-11-25 19:59:39,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-25 19:59:39,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:39,475 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1, 1] [2021-11-25 19:59:39,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:39,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 19:59:39,691 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:59:39,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:39,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1921787196, now seen corresponding path program 5 times [2021-11-25 19:59:39,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:39,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240070673] [2021-11-25 19:59:39,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:39,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:40,643 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:40,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240070673] [2021-11-25 19:59:40,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240070673] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:40,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787342258] [2021-11-25 19:59:40,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:59:40,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:40,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:40,649 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:40,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 19:59:40,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-25 19:59:40,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:59:40,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-25 19:59:40,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:41,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:59:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:43,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787342258] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:59:43,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [979670883] [2021-11-25 19:59:43,943 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:59:43,943 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:59:43,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:59:43,943 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:59:43,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:59:44,082 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:59:44,853 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9690#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (< 2147483646 |ULTIMATE.start_main_~j~0#1|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:59:44,853 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:59:44,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:59:44,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2021-11-25 19:59:44,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515296979] [2021-11-25 19:59:44,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:59:44,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-25 19:59:44,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:44,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-25 19:59:44,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4580, Invalid=5926, Unknown=0, NotChecked=0, Total=10506 [2021-11-25 19:59:44,858 INFO L87 Difference]: Start difference. First operand 476 states and 523 transitions. Second operand has 96 states, 95 states have (on average 4.957894736842105) internal successors, (471), 96 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:45,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:45,197 INFO L93 Difference]: Finished difference Result 479 states and 526 transitions. [2021-11-25 19:59:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-25 19:59:45,198 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 4.957894736842105) internal successors, (471), 96 states have internal predecessors, (471), 0 states have call successors, (0), 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 236 [2021-11-25 19:59:45,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:45,201 INFO L225 Difference]: With dead ends: 479 [2021-11-25 19:59:45,201 INFO L226 Difference]: Without dead ends: 478 [2021-11-25 19:59:45,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 653 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4580, Invalid=5926, Unknown=0, NotChecked=0, Total=10506 [2021-11-25 19:59:45,203 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 141 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:45,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 293 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:59:45,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-11-25 19:59:45,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 478. [2021-11-25 19:59:45,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 476 states have (on average 1.004201680672269) internal successors, (478), 477 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:45,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 478 transitions. [2021-11-25 19:59:45,221 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 478 transitions. Word has length 236 [2021-11-25 19:59:45,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:45,222 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 478 transitions. [2021-11-25 19:59:45,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 4.957894736842105) internal successors, (471), 96 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:45,222 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 478 transitions. [2021-11-25 19:59:45,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-11-25 19:59:45,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:45,232 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 94, 94, 94, 1, 1, 1] [2021-11-25 19:59:45,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:45,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 19:59:45,450 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:59:45,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:45,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1625343230, now seen corresponding path program 6 times [2021-11-25 19:59:45,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:45,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844436762] [2021-11-25 19:59:45,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:45,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:55,889 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:55,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844436762] [2021-11-25 19:59:55,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844436762] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:55,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797041747] [2021-11-25 19:59:55,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:59:55,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:55,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:55,891 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:55,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 19:59:56,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:59:56,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:59:56,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 191 conjunts are in the unsatisfiable core [2021-11-25 19:59:56,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:57,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:00:21,275 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:00:21,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797041747] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:00:21,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [843395707] [2021-11-25 20:00:21,278 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 20:00:21,278 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:00:21,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:00:21,279 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:00:21,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:00:21,476 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:00:23,180 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14064#(and (<= 1 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (= |ULTIMATE.start_main_#t~post4#1| |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~k~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:00:23,181 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:00:23,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:00:23,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 381 [2021-11-25 20:00:23,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630433129] [2021-11-25 20:00:23,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:00:23,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 382 states [2021-11-25 20:00:23,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:00:23,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 382 interpolants. [2021-11-25 20:00:23,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36694, Invalid=114238, Unknown=0, NotChecked=0, Total=150932 [2021-11-25 20:00:23,205 INFO L87 Difference]: Start difference. First operand 478 states and 478 transitions. Second operand has 382 states, 381 states have (on average 2.4855643044619424) internal successors, (947), 382 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:00:49,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:00:49,185 INFO L93 Difference]: Finished difference Result 1053 states and 1148 transitions. [2021-11-25 20:00:49,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 383 states. [2021-11-25 20:00:49,186 INFO L78 Accepts]: Start accepts. Automaton has has 382 states, 381 states have (on average 2.4855643044619424) internal successors, (947), 382 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 474 [2021-11-25 20:00:49,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:00:49,192 INFO L225 Difference]: With dead ends: 1053 [2021-11-25 20:00:49,193 INFO L226 Difference]: Without dead ends: 1052 [2021-11-25 20:00:49,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1801 GetRequests, 1224 SyntacticMatches, 0 SemanticMatches, 577 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75793 ImplicationChecksByTransitivity, 51.0s TimeCoverageRelationStatistics Valid=91320, Invalid=243342, Unknown=0, NotChecked=0, Total=334662 [2021-11-25 20:00:49,214 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 2985 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2985 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:00:49,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2985 Valid, 511 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 20:00:49,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-11-25 20:00:49,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 956. [2021-11-25 20:00:49,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 954 states have (on average 1.10167714884696) internal successors, (1051), 955 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:00:49,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1051 transitions. [2021-11-25 20:00:49,248 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1051 transitions. Word has length 474 [2021-11-25 20:00:49,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:00:49,249 INFO L470 AbstractCegarLoop]: Abstraction has 956 states and 1051 transitions. [2021-11-25 20:00:49,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 382 states, 381 states have (on average 2.4855643044619424) internal successors, (947), 382 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:00:49,250 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1051 transitions. [2021-11-25 20:00:49,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-11-25 20:00:49,262 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:00:49,263 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 94, 94, 1, 1, 1] [2021-11-25 20:00:49,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:00:49,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:00:49,475 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 20:00:49,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:00:49,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1413253316, now seen corresponding path program 6 times [2021-11-25 20:00:49,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:00:49,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469585439] [2021-11-25 20:00:49,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:00:49,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:00:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:00:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:00:53,459 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:00:53,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469585439] [2021-11-25 20:00:53,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469585439] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:00:53,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697351823] [2021-11-25 20:00:53,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:00:53,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:00:53,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:00:53,488 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:00:53,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 20:00:53,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:00:53,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:00:53,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-25 20:00:53,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:00:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:00:54,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:01:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:01:04,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697351823] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:01:04,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [46822220] [2021-11-25 20:01:04,340 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 20:01:04,341 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:01:04,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:01:04,341 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:01:04,342 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:01:04,478 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:01:05,052 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19884#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (< 2147483646 |ULTIMATE.start_main_~j~0#1|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:01:05,052 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:01:05,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:01:05,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2021-11-25 20:01:05,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094657547] [2021-11-25 20:01:05,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:01:05,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-11-25 20:01:05,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:01:05,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-11-25 20:01:05,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18357, Invalid=21045, Unknown=0, NotChecked=0, Total=39402 [2021-11-25 20:01:05,064 INFO L87 Difference]: Start difference. First operand 956 states and 1051 transitions. Second operand has 192 states, 191 states have (on average 4.979057591623037) internal successors, (951), 192 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:01:06,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:01:06,704 INFO L93 Difference]: Finished difference Result 959 states and 1054 transitions. [2021-11-25 20:01:06,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-25 20:01:06,705 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 191 states have (on average 4.979057591623037) internal successors, (951), 192 states have internal predecessors, (951), 0 states have call successors, (0), 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 476 [2021-11-25 20:01:06,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:01:06,711 INFO L225 Difference]: With dead ends: 959 [2021-11-25 20:01:06,712 INFO L226 Difference]: Without dead ends: 958 [2021-11-25 20:01:06,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1522 GetRequests, 1325 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=18357, Invalid=21045, Unknown=0, NotChecked=0, Total=39402 [2021-11-25 20:01:06,716 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 190 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:01:06,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 582 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:01:06,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-11-25 20:01:06,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 958. [2021-11-25 20:01:06,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 956 states have (on average 1.002092050209205) internal successors, (958), 957 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:01:06,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 958 transitions. [2021-11-25 20:01:06,750 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 958 transitions. Word has length 476 [2021-11-25 20:01:06,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:01:06,751 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 958 transitions. [2021-11-25 20:01:06,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 191 states have (on average 4.979057591623037) internal successors, (951), 192 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:01:06,752 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 958 transitions. [2021-11-25 20:01:06,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2021-11-25 20:01:06,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:01:06,762 INFO L514 BasicCegarLoop]: trace histogram [191, 190, 190, 190, 190, 1, 1, 1] [2021-11-25 20:01:06,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 20:01:06,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 20:01:06,987 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 20:01:06,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:01:06,988 INFO L85 PathProgramCache]: Analyzing trace with hash 711694082, now seen corresponding path program 7 times [2021-11-25 20:01:06,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:01:06,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339631492] [2021-11-25 20:01:06,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:01:06,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:01:08,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:01:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:01:44,974 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:01:44,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339631492] [2021-11-25 20:01:44,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339631492] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:01:44,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099759748] [2021-11-25 20:01:44,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:01:44,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:01:44,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:01:44,982 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:01:44,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 20:01:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:01:45,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 2125 conjuncts, 383 conjunts are in the unsatisfiable core [2021-11-25 20:01:45,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:01:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:01:47,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:03:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:23,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099759748] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:03:23,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [517425183] [2021-11-25 20:03:23,461 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 20:03:23,461 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:03:23,461 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:03:23,461 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:03:23,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:03:23,607 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:03:25,458 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28674#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_#t~post4#1| 2147483647) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~j~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:03:25,459 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:03:25,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:03:25,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [383, 383, 383] total 765 [2021-11-25 20:03:25,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340440380] [2021-11-25 20:03:25,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:03:25,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 766 states [2021-11-25 20:03:25,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:25,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 766 interpolants. [2021-11-25 20:03:25,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147094, Invalid=449662, Unknown=0, NotChecked=0, Total=596756 [2021-11-25 20:03:25,536 INFO L87 Difference]: Start difference. First operand 958 states and 958 transitions. Second operand has 766 states, 765 states have (on average 2.49281045751634) internal successors, (1907), 766 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:07:11,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:11,521 INFO L93 Difference]: Finished difference Result 2109 states and 2300 transitions. [2021-11-25 20:07:11,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 767 states. [2021-11-25 20:07:11,523 INFO L78 Accepts]: Start accepts. Automaton has has 766 states, 765 states have (on average 2.49281045751634) internal successors, (1907), 766 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 954 [2021-11-25 20:07:11,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:11,536 INFO L225 Difference]: With dead ends: 2109 [2021-11-25 20:07:11,536 INFO L226 Difference]: Without dead ends: 2108 [2021-11-25 20:07:11,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3625 GetRequests, 2472 SyntacticMatches, 0 SemanticMatches, 1153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299089 ImplicationChecksByTransitivity, 199.4s TimeCoverageRelationStatistics Valid=366936, Invalid=965934, Unknown=0, NotChecked=0, Total=1332870 [2021-11-25 20:07:11,621 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 5271 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5271 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 2139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:11,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5271 Valid, 1005 Invalid, 2139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1940 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 20:07:11,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-11-25 20:07:11,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1916. [2021-11-25 20:07:11,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1914 states have (on average 1.100835945663532) internal successors, (2107), 1915 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:07:11,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2107 transitions. [2021-11-25 20:07:11,675 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2107 transitions. Word has length 954 [2021-11-25 20:07:11,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:11,677 INFO L470 AbstractCegarLoop]: Abstraction has 1916 states and 2107 transitions. [2021-11-25 20:07:11,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 766 states, 765 states have (on average 2.49281045751634) internal successors, (1907), 766 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:07:11,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2107 transitions. [2021-11-25 20:07:11,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 957 [2021-11-25 20:07:11,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:11,688 INFO L514 BasicCegarLoop]: trace histogram [191, 191, 191, 190, 190, 1, 1, 1] [2021-11-25 20:07:11,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-25 20:07:11,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 20:07:11,903 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 20:07:11,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:11,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1038214340, now seen corresponding path program 7 times [2021-11-25 20:07:11,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:07:11,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633567471] [2021-11-25 20:07:11,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:11,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:07:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:07:24,537 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:07:24,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633567471] [2021-11-25 20:07:24,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633567471] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:07:24,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366330850] [2021-11-25 20:07:24,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:07:24,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:07:24,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:07:24,538 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:07:24,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 20:07:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:24,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 2129 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-25 20:07:24,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:07:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:07:26,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:08:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:08:01,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366330850] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:08:01,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [574090956] [2021-11-25 20:08:01,759 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 20:08:01,760 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:08:01,760 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:08:01,760 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:08:01,760 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:08:01,899 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:08:02,841 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40350#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (< 2147483646 |ULTIMATE.start_main_~j~0#1|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:08:02,841 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:08:02,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:08:02,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 383 [2021-11-25 20:08:02,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600475733] [2021-11-25 20:08:02,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:08:02,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2021-11-25 20:08:02,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:08:02,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2021-11-25 20:08:02,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73557, Invalid=78933, Unknown=0, NotChecked=0, Total=152490 [2021-11-25 20:08:02,868 INFO L87 Difference]: Start difference. First operand 1916 states and 2107 transitions. Second operand has 384 states, 383 states have (on average 4.989556135770235) internal successors, (1911), 384 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:08:09,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:09,877 INFO L93 Difference]: Finished difference Result 1919 states and 2110 transitions. [2021-11-25 20:08:09,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-25 20:08:09,878 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 383 states have (on average 4.989556135770235) internal successors, (1911), 384 states have internal predecessors, (1911), 0 states have call successors, (0), 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 956 [2021-11-25 20:08:09,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:09,889 INFO L225 Difference]: With dead ends: 1919 [2021-11-25 20:08:09,889 INFO L226 Difference]: Without dead ends: 1918 [2021-11-25 20:08:09,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3058 GetRequests, 2669 SyntacticMatches, 0 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4000 ImplicationChecksByTransitivity, 46.3s TimeCoverageRelationStatistics Valid=73557, Invalid=78933, Unknown=0, NotChecked=0, Total=152490 [2021-11-25 20:08:09,901 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 382 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:09,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 1157 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:08:09,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-11-25 20:08:09,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1918. [2021-11-25 20:08:09,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1916 states have (on average 1.001043841336117) internal successors, (1918), 1917 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:08:09,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 1918 transitions. [2021-11-25 20:08:09,953 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 1918 transitions. Word has length 956 [2021-11-25 20:08:09,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:09,955 INFO L470 AbstractCegarLoop]: Abstraction has 1918 states and 1918 transitions. [2021-11-25 20:08:09,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 383 states have (on average 4.989556135770235) internal successors, (1911), 384 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:08:09,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 1918 transitions. [2021-11-25 20:08:09,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1915 [2021-11-25 20:08:09,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:09,984 INFO L514 BasicCegarLoop]: trace histogram [383, 382, 382, 382, 382, 1, 1, 1] [2021-11-25 20:08:10,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 20:08:10,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23ace4e6-4b86-440f-b3a3-4a4b229bcdd8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 20:08:10,211 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 20:08:10,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:10,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1521201406, now seen corresponding path program 8 times [2021-11-25 20:08:10,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:08:10,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691788391] [2021-11-25 20:08:10,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:10,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:08:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat