./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/bAnd1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/bAnd1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ad5600d67d8e26bbe74b5b2723c79b08c56f70a1300290f9b8c920a6b187d1e0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 06:35:21,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:35:21,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:35:21,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:35:21,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:35:21,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:35:21,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:35:21,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:35:21,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:35:21,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:35:21,210 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:35:21,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:35:21,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:35:21,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:35:21,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:35:21,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:35:21,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:35:21,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:35:21,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:35:21,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:35:21,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:35:21,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:35:21,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:35:21,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:35:21,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:35:21,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:35:21,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:35:21,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:35:21,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:35:21,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:35:21,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:35:21,224 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:35:21,225 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:35:21,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:35:21,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:35:21,226 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:35:21,227 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:35:21,227 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:35:21,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:35:21,228 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:35:21,228 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:35:21,229 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:35:21,244 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:35:21,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:35:21,244 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:35:21,244 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:35:21,245 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:35:21,245 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:35:21,245 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:35:21,245 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:35:21,253 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:35:21,253 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:35:21,253 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:35:21,253 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:35:21,253 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:35:21,254 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:35:21,254 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:35:21,254 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:35:21,254 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:35:21,254 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:35:21,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:35:21,255 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:35:21,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:35:21,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:35:21,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:35:21,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:35:21,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:35:21,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:35:21,257 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:35:21,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:35:21,257 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:35:21,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:35:21,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:35:21,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:35:21,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:35:21,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:35:21,258 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:35:21,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:35:21,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:35:21,259 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:35:21,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:35:21,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:35:21,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:35:21,260 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad5600d67d8e26bbe74b5b2723c79b08c56f70a1300290f9b8c920a6b187d1e0 [2022-12-14 06:35:21,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:35:21,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:35:21,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:35:21,503 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:35:21,503 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:35:21,505 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-crafted/bAnd1.i [2022-12-14 06:35:24,120 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:35:24,241 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:35:24,241 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/sv-benchmarks/c/array-crafted/bAnd1.i [2022-12-14 06:35:24,245 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/data/093433b5d/432c445c04824e10854e627ea928e3db/FLAG9d731d8f6 [2022-12-14 06:35:24,255 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/data/093433b5d/432c445c04824e10854e627ea928e3db [2022-12-14 06:35:24,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:35:24,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:35:24,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:35:24,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:35:24,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:35:24,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:35:24" (1/1) ... [2022-12-14 06:35:24,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25bc99e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:24, skipping insertion in model container [2022-12-14 06:35:24,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:35:24" (1/1) ... [2022-12-14 06:35:24,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:35:24,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:35:24,398 WARN L237 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_24d76a3a-d5dd-437c-9806-ae1374dcaba3/sv-benchmarks/c/array-crafted/bAnd1.i[1290,1303] [2022-12-14 06:35:24,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:35:24,409 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:35:24,426 WARN L237 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_24d76a3a-d5dd-437c-9806-ae1374dcaba3/sv-benchmarks/c/array-crafted/bAnd1.i[1290,1303] [2022-12-14 06:35:24,427 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:35:24,438 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:35:24,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:24 WrapperNode [2022-12-14 06:35:24,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:35:24,440 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:35:24,440 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:35:24,440 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:35:24,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:24" (1/1) ... [2022-12-14 06:35:24,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:24" (1/1) ... [2022-12-14 06:35:24,467 INFO L138 Inliner]: procedures = 16, calls = 31, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 75 [2022-12-14 06:35:24,467 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:35:24,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:35:24,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:35:24,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:35:24,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:24" (1/1) ... [2022-12-14 06:35:24,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:24" (1/1) ... [2022-12-14 06:35:24,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:24" (1/1) ... [2022-12-14 06:35:24,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:24" (1/1) ... [2022-12-14 06:35:24,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:24" (1/1) ... [2022-12-14 06:35:24,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:24" (1/1) ... [2022-12-14 06:35:24,486 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:24" (1/1) ... [2022-12-14 06:35:24,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:24" (1/1) ... [2022-12-14 06:35:24,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:35:24,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:35:24,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:35:24,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:35:24,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:24" (1/1) ... [2022-12-14 06:35:24,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:35:24,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:35:24,518 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:35:24,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:35:24,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:35:24,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:35:24,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 06:35:24,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 06:35:24,556 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2022-12-14 06:35:24,556 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2022-12-14 06:35:24,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:35:24,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:35:24,557 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 06:35:24,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 06:35:24,619 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:35:24,621 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:35:24,757 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:35:24,808 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:35:24,808 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 06:35:24,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:35:24 BoogieIcfgContainer [2022-12-14 06:35:24,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:35:24,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:35:24,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:35:24,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:35:24,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:35:24" (1/3) ... [2022-12-14 06:35:24,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c04a9db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:35:24, skipping insertion in model container [2022-12-14 06:35:24,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:24" (2/3) ... [2022-12-14 06:35:24,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c04a9db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:35:24, skipping insertion in model container [2022-12-14 06:35:24,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:35:24" (3/3) ... [2022-12-14 06:35:24,816 INFO L112 eAbstractionObserver]: Analyzing ICFG bAnd1.i [2022-12-14 06:35:24,831 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:35:24,831 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:35:24,865 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:35:24,871 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3dc33a83, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:35:24,871 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:35:24,875 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 06:35:24,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 06:35:24,887 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:35:24,888 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:35:24,888 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:35:24,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:35:24,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1693093707, now seen corresponding path program 1 times [2022-12-14 06:35:24,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:35:24,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887962163] [2022-12-14 06:35:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:24,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:35:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:25,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 06:35:25,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:35:25,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887962163] [2022-12-14 06:35:25,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887962163] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:35:25,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:35:25,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:35:25,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677675938] [2022-12-14 06:35:25,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:35:25,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:35:25,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:35:25,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:35:25,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:35:25,131 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 06:35:25,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:35:25,169 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-12-14 06:35:25,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:35:25,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2022-12-14 06:35:25,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:35:25,176 INFO L225 Difference]: With dead ends: 33 [2022-12-14 06:35:25,176 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 06:35:25,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:35:25,181 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:35:25,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:35:25,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 06:35:25,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-12-14 06:35:25,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 06:35:25,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-12-14 06:35:25,207 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2022-12-14 06:35:25,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:35:25,208 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-12-14 06:35:25,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 06:35:25,208 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-12-14 06:35:25,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 06:35:25,209 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:35:25,209 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:35:25,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:35:25,210 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:35:25,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:35:25,211 INFO L85 PathProgramCache]: Analyzing trace with hash -2008323644, now seen corresponding path program 1 times [2022-12-14 06:35:25,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:35:25,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629250752] [2022-12-14 06:35:25,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:25,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:35:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 06:35:25,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:35:25,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629250752] [2022-12-14 06:35:25,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629250752] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:35:25,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966803094] [2022-12-14 06:35:25,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:25,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:25,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:35:25,302 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:35:25,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:35:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:25,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:35:25,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:35:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 06:35:25,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:35:25,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966803094] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:35:25,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:35:25,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-14 06:35:25,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071365083] [2022-12-14 06:35:25,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:35:25,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:35:25,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:35:25,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:35:25,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:35:25,387 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 06:35:25,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:35:25,405 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2022-12-14 06:35:25,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:35:25,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-12-14 06:35:25,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:35:25,406 INFO L225 Difference]: With dead ends: 29 [2022-12-14 06:35:25,406 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 06:35:25,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:35:25,408 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:35:25,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:35:25,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 06:35:25,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-14 06:35:25,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 06:35:25,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-12-14 06:35:25,411 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2022-12-14 06:35:25,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:35:25,411 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-12-14 06:35:25,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 06:35:25,412 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-12-14 06:35:25,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 06:35:25,412 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:35:25,412 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:35:25,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:35:25,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 06:35:25,615 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:35:25,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:35:25,617 INFO L85 PathProgramCache]: Analyzing trace with hash 278142551, now seen corresponding path program 1 times [2022-12-14 06:35:25,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:35:25,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745891066] [2022-12-14 06:35:25,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:25,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:35:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 06:35:25,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:35:25,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745891066] [2022-12-14 06:35:25,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745891066] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:35:25,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840298208] [2022-12-14 06:35:25,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:25,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:25,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:35:25,811 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:35:25,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:35:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:25,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:35:25,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:35:25,894 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 06:35:25,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:35:25,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840298208] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:35:25,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:35:25,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-14 06:35:25,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014125742] [2022-12-14 06:35:25,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:35:25,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:35:25,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:35:25,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:35:25,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:35:25,897 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 06:35:25,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:35:25,923 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-12-14 06:35:25,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:35:25,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-12-14 06:35:25,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:35:25,924 INFO L225 Difference]: With dead ends: 27 [2022-12-14 06:35:25,925 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 06:35:25,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:35:25,926 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:35:25,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:35:25,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 06:35:25,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-12-14 06:35:25,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 06:35:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-12-14 06:35:25,929 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2022-12-14 06:35:25,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:35:25,930 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-12-14 06:35:25,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 06:35:25,931 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-12-14 06:35:25,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 06:35:25,931 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:35:25,931 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:35:25,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:35:26,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:26,134 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:35:26,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:35:26,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1291407525, now seen corresponding path program 1 times [2022-12-14 06:35:26,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:35:26,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505804526] [2022-12-14 06:35:26,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:26,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:35:26,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 06:35:26,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:35:26,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505804526] [2022-12-14 06:35:26,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505804526] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:35:26,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488028852] [2022-12-14 06:35:26,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:26,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:26,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:35:26,322 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:35:26,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:35:26,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:26,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:35:26,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:35:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 06:35:26,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:35:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 06:35:26,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488028852] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:35:26,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [940800028] [2022-12-14 06:35:26,458 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 06:35:26,459 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:35:26,463 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:35:26,468 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:35:26,469 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:35:26,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:26,569 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 06:35:26,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 06:35:26,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:26,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 06:35:26,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:26,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 06:35:26,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:26,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:26,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:26,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:26,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:26,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:26,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:26,788 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-12-14 06:35:26,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 298 treesize of output 289 [2022-12-14 06:35:26,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:35:27,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:27,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 06:35:27,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:27,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-12-14 06:35:27,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:27,175 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-12-14 06:35:27,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-12-14 06:35:27,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 06:35:27,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:35:27,340 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-12-14 06:35:27,425 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:35:32,209 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '524#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_bAnd_~res~0_BEFORE_RETURN_5 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_5 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_5 4294967296) (+ (mod v_bAnd_~res~0_BEFORE_RETURN_5 4294967296) (- 4294967296))))) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-12-14 06:35:32,209 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:35:32,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:35:32,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2022-12-14 06:35:32,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413606749] [2022-12-14 06:35:32,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:35:32,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:35:32,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:35:32,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:35:32,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-12-14 06:35:32,211 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 06:35:32,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:35:32,234 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-12-14 06:35:32,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:35:32,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2022-12-14 06:35:32,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:35:32,235 INFO L225 Difference]: With dead ends: 36 [2022-12-14 06:35:32,235 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 06:35:32,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-12-14 06:35:32,236 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:35:32,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:35:32,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 06:35:32,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 06:35:32,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 06:35:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-12-14 06:35:32,239 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2022-12-14 06:35:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:35:32,239 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-12-14 06:35:32,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 06:35:32,239 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-12-14 06:35:32,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 06:35:32,240 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:35:32,240 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:35:32,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:35:32,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:32,441 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:35:32,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:35:32,441 INFO L85 PathProgramCache]: Analyzing trace with hash -813437022, now seen corresponding path program 2 times [2022-12-14 06:35:32,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:35:32,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374504855] [2022-12-14 06:35:32,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:32,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:35:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 06:35:32,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:35:32,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374504855] [2022-12-14 06:35:32,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374504855] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:35:32,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051045337] [2022-12-14 06:35:32,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:35:32,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:32,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:35:32,502 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:35:32,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:35:32,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 06:35:32,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:35:32,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:35:32,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:35:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 06:35:32,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:35:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 06:35:32,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051045337] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:35:32,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1751763040] [2022-12-14 06:35:32,594 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 06:35:32,594 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:35:32,595 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:35:32,595 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:35:32,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:35:32,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:32,630 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 06:35:32,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 06:35:32,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:32,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 06:35:32,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:32,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2022-12-14 06:35:32,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:32,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:32,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:32,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:32,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:32,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:32,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:32,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:32,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:32,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:32,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:32,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:32,766 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-12-14 06:35:32,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 41 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 308 treesize of output 288 [2022-12-14 06:35:32,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:35:32,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:32,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 06:35:32,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:32,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:32,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 06:35:33,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:33,034 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 06:35:33,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-12-14 06:35:33,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 06:35:33,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:35:33,165 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-12-14 06:35:33,236 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:35:37,911 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(and (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|))' at error location [2022-12-14 06:35:37,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:35:37,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:35:37,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-14 06:35:37,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277696532] [2022-12-14 06:35:37,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:35:37,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:35:37,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:35:37,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:35:37,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2022-12-14 06:35:37,913 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 06:35:37,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:35:37,935 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-12-14 06:35:37,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:35:37,936 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2022-12-14 06:35:37,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:35:37,936 INFO L225 Difference]: With dead ends: 38 [2022-12-14 06:35:37,936 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 06:35:37,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2022-12-14 06:35:37,937 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:35:37,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:35:37,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 06:35:37,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-12-14 06:35:37,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 06:35:37,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-12-14 06:35:37,941 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2022-12-14 06:35:37,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:35:37,941 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-12-14 06:35:37,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 06:35:37,941 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-12-14 06:35:37,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 06:35:37,942 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:35:37,942 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:35:37,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:35:38,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:38,144 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:35:38,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:35:38,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1794020475, now seen corresponding path program 3 times [2022-12-14 06:35:38,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:35:38,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998077626] [2022-12-14 06:35:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:38,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:35:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-12-14 06:35:38,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:35:38,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998077626] [2022-12-14 06:35:38,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998077626] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:35:38,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569160580] [2022-12-14 06:35:38,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:35:38,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:38,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:35:38,275 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:35:38,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:35:38,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:35:38,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:35:38,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 06:35:38,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:35:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-12-14 06:35:38,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:35:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-12-14 06:35:38,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569160580] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:35:38,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [447805287] [2022-12-14 06:35:38,424 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 06:35:38,424 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:35:38,424 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:35:38,425 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:35:38,425 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:35:38,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:38,450 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 06:35:38,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 06:35:38,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:38,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 06:35:38,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:38,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 06:35:38,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:38,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:38,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:38,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:38,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:38,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:38,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:38,571 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-12-14 06:35:38,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 298 treesize of output 289 [2022-12-14 06:35:38,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:35:38,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:38,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 06:35:38,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:38,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:38,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 06:35:38,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:38,836 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 06:35:38,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-12-14 06:35:38,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 06:35:38,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:35:38,937 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-12-14 06:35:38,987 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:35:41,669 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1141#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_bAnd_~res~0_BEFORE_RETURN_17 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_17 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_17 4294967296) (+ (mod v_bAnd_~res~0_BEFORE_RETURN_17 4294967296) (- 4294967296))))) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-12-14 06:35:41,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:35:41,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:35:41,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2022-12-14 06:35:41,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790298593] [2022-12-14 06:35:41,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:35:41,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 06:35:41,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:35:41,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 06:35:41,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-12-14 06:35:41,671 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 06:35:41,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:35:41,701 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-12-14 06:35:41,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 06:35:41,701 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 37 [2022-12-14 06:35:41,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:35:41,702 INFO L225 Difference]: With dead ends: 49 [2022-12-14 06:35:41,702 INFO L226 Difference]: Without dead ends: 31 [2022-12-14 06:35:41,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-12-14 06:35:41,703 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:35:41,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:35:41,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-14 06:35:41,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-12-14 06:35:41,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 06:35:41,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-12-14 06:35:41,708 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2022-12-14 06:35:41,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:35:41,708 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-12-14 06:35:41,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 06:35:41,708 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-12-14 06:35:41,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 06:35:41,709 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:35:41,709 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:35:41,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:35:41,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 06:35:41,911 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:35:41,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:35:41,912 INFO L85 PathProgramCache]: Analyzing trace with hash 488767211, now seen corresponding path program 4 times [2022-12-14 06:35:41,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:35:41,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036773138] [2022-12-14 06:35:41,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:41,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:35:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:42,192 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-12-14 06:35:42,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:35:42,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036773138] [2022-12-14 06:35:42,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036773138] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:35:42,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660687413] [2022-12-14 06:35:42,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:35:42,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:42,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:35:42,194 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:35:42,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:35:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:42,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 06:35:42,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:35:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-12-14 06:35:42,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:35:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-12-14 06:35:42,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660687413] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:35:42,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1584719146] [2022-12-14 06:35:42,431 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 06:35:42,431 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:35:42,431 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:35:42,431 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:35:42,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:35:42,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:42,451 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 06:35:42,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 06:35:42,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:42,468 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 06:35:42,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 06:35:42,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:42,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2022-12-14 06:35:42,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:42,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:42,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:42,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:42,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:42,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:42,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:42,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:42,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:42,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:42,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:42,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:42,568 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-12-14 06:35:42,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 41 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 308 treesize of output 288 [2022-12-14 06:35:42,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:35:42,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:42,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 06:35:42,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:42,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:42,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 06:35:42,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:42,779 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 06:35:42,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-12-14 06:35:42,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 06:35:42,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:35:42,875 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-12-14 06:35:42,921 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:35:49,615 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1574#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-12-14 06:35:49,615 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:35:49,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:35:49,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2022-12-14 06:35:49,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383552916] [2022-12-14 06:35:49,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:35:49,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 06:35:49,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:35:49,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 06:35:49,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=1046, Unknown=1, NotChecked=0, Total=1406 [2022-12-14 06:35:49,617 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 06:35:49,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:35:49,651 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2022-12-14 06:35:49,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 06:35:49,652 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2022-12-14 06:35:49,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:35:49,652 INFO L225 Difference]: With dead ends: 62 [2022-12-14 06:35:49,652 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 06:35:49,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=359, Invalid=1046, Unknown=1, NotChecked=0, Total=1406 [2022-12-14 06:35:49,654 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:35:49,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:35:49,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 06:35:49,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-12-14 06:35:49,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 06:35:49,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-12-14 06:35:49,660 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 44 [2022-12-14 06:35:49,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:35:49,660 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-12-14 06:35:49,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 06:35:49,660 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-12-14 06:35:49,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 06:35:49,662 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:35:49,662 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:35:49,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:35:49,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 06:35:49,864 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:35:49,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:35:49,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1153146453, now seen corresponding path program 5 times [2022-12-14 06:35:49,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:35:49,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249060596] [2022-12-14 06:35:49,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:49,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:35:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:50,352 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-12-14 06:35:50,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:35:50,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249060596] [2022-12-14 06:35:50,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249060596] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:35:50,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443822653] [2022-12-14 06:35:50,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:35:50,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:50,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:35:50,353 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:35:50,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 06:35:50,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:35:50,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:35:50,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 06:35:50,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:35:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-12-14 06:35:50,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:35:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-12-14 06:35:50,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443822653] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:35:50,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1682015489] [2022-12-14 06:35:50,550 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 06:35:50,551 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:35:50,551 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:35:50,551 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:35:50,551 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:35:50,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,572 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 06:35:50,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 06:35:50,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,589 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 06:35:50,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 06:35:50,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2022-12-14 06:35:50,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,686 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-12-14 06:35:50,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 41 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 308 treesize of output 288 [2022-12-14 06:35:50,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:35:50,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 06:35:50,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-12-14 06:35:50,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,883 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-12-14 06:35:50,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2022-12-14 06:35:50,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 06:35:50,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:35:51,009 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-12-14 06:35:51,056 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:35:52,021 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2139#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (exists ((v_bAnd_~res~0_BEFORE_RETURN_29 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_29 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_29 4294967296) (+ (mod v_bAnd_~res~0_BEFORE_RETURN_29 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-12-14 06:35:52,021 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:35:52,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:35:52,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2022-12-14 06:35:52,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785904697] [2022-12-14 06:35:52,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:35:52,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 06:35:52,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:35:52,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 06:35:52,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 06:35:52,025 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 06:35:52,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:35:52,085 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2022-12-14 06:35:52,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 06:35:52,086 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2022-12-14 06:35:52,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:35:52,086 INFO L225 Difference]: With dead ends: 69 [2022-12-14 06:35:52,086 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 06:35:52,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 06:35:52,089 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:35:52,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:35:52,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 06:35:52,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-12-14 06:35:52,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 06:35:52,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-12-14 06:35:52,094 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 56 [2022-12-14 06:35:52,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:35:52,094 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-12-14 06:35:52,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 06:35:52,094 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-12-14 06:35:52,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 06:35:52,094 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:35:52,095 INFO L195 NwaCegarLoop]: trace histogram [30, 23, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:35:52,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 06:35:52,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:52,296 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:35:52,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:35:52,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1557704060, now seen corresponding path program 6 times [2022-12-14 06:35:52,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:35:52,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299366073] [2022-12-14 06:35:52,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:52,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:35:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-12-14 06:35:53,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:35:53,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299366073] [2022-12-14 06:35:53,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299366073] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:35:53,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227566629] [2022-12-14 06:35:53,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:35:53,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:53,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:35:53,084 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:35:53,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 06:35:53,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:35:53,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:35:53,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 06:35:53,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:35:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-12-14 06:35:53,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:35:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-12-14 06:35:53,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227566629] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:35:53,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [511458110] [2022-12-14 06:35:53,789 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 06:35:53,789 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:35:53,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:35:53,790 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:35:53,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:35:53,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:53,816 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 06:35:53,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 06:35:53,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:53,834 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 06:35:53,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 06:35:53,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:53,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2022-12-14 06:35:53,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:53,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:53,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:53,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:53,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:53,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:53,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:53,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:53,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:53,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:53,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:53,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:53,925 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-12-14 06:35:53,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 41 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 308 treesize of output 288 [2022-12-14 06:35:53,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:35:54,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:54,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 06:35:54,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:54,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-12-14 06:35:54,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:54,106 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-12-14 06:35:54,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-12-14 06:35:54,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 06:35:54,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:35:54,216 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-12-14 06:35:54,264 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:36:01,028 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2862#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_bAnd_~res~0_BEFORE_RETURN_36 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_36 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_36 4294967296) (+ (mod v_bAnd_~res~0_BEFORE_RETURN_36 4294967296) (- 4294967296))))) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-12-14 06:36:01,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:36:01,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:36:01,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 51 [2022-12-14 06:36:01,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354064601] [2022-12-14 06:36:01,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:36:01,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 06:36:01,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:01,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 06:36:01,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 06:36:01,030 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 06:36:01,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:01,087 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2022-12-14 06:36:01,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 06:36:01,088 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 75 [2022-12-14 06:36:01,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:01,088 INFO L225 Difference]: With dead ends: 100 [2022-12-14 06:36:01,088 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 06:36:01,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 06:36:01,089 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:01,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:36:01,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 06:36:01,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-12-14 06:36:01,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 06:36:01,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2022-12-14 06:36:01,094 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 75 [2022-12-14 06:36:01,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:01,094 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2022-12-14 06:36:01,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 06:36:01,094 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2022-12-14 06:36:01,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 06:36:01,095 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:01,095 INFO L195 NwaCegarLoop]: trace histogram [48, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:01,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 06:36:01,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:36:01,296 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:36:01,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:01,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1927870101, now seen corresponding path program 7 times [2022-12-14 06:36:01,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:01,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350695041] [2022-12-14 06:36:01,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:01,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-12-14 06:36:03,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:03,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350695041] [2022-12-14 06:36:03,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350695041] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:36:03,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650268154] [2022-12-14 06:36:03,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:36:03,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:36:03,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:36:03,162 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:36:03,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 06:36:03,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:03,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 06:36:03,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:36:03,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-12-14 06:36:03,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:36:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-12-14 06:36:05,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650268154] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:36:05,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [550911775] [2022-12-14 06:36:05,629 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 06:36:05,629 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:36:05,630 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:36:05,630 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:36:05,630 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:36:05,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:05,650 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 06:36:05,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 06:36:05,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:05,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 06:36:05,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:05,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 06:36:05,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:05,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:05,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:05,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:05,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:05,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:05,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:36:05,747 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-12-14 06:36:05,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 298 treesize of output 289 [2022-12-14 06:36:05,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:36:05,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:05,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 06:36:05,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:05,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:36:05,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 06:36:05,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:05,969 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 06:36:05,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-12-14 06:36:05,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 06:36:05,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:36:06,056 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-12-14 06:36:06,096 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:36:09,156 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3897#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (exists ((v_bAnd_~res~0_BEFORE_RETURN_42 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_42 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_42 4294967296) (+ (mod v_bAnd_~res~0_BEFORE_RETURN_42 4294967296) (- 4294967296))))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-12-14 06:36:09,156 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:36:09,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:36:09,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 51] total 101 [2022-12-14 06:36:09,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488346155] [2022-12-14 06:36:09,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:36:09,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-12-14 06:36:09,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:09,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-12-14 06:36:09,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-12-14 06:36:09,160 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 06:36:09,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:09,274 INFO L93 Difference]: Finished difference Result 150 states and 207 transitions. [2022-12-14 06:36:09,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-12-14 06:36:09,275 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 100 [2022-12-14 06:36:09,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:09,276 INFO L225 Difference]: With dead ends: 150 [2022-12-14 06:36:09,276 INFO L226 Difference]: Without dead ends: 125 [2022-12-14 06:36:09,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-12-14 06:36:09,279 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:09,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:36:09,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-12-14 06:36:09,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-12-14 06:36:09,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 06:36:09,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2022-12-14 06:36:09,289 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 100 [2022-12-14 06:36:09,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:09,289 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2022-12-14 06:36:09,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 06:36:09,290 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2022-12-14 06:36:09,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 06:36:09,292 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:09,292 INFO L195 NwaCegarLoop]: trace histogram [98, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:09,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 06:36:09,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 06:36:09,493 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:36:09,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:09,495 INFO L85 PathProgramCache]: Analyzing trace with hash -736615541, now seen corresponding path program 8 times [2022-12-14 06:36:09,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:09,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317819033] [2022-12-14 06:36:09,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:09,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-12-14 06:36:14,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:14,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317819033] [2022-12-14 06:36:14,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317819033] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:36:14,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950886272] [2022-12-14 06:36:14,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:36:14,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:36:14,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:36:14,174 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:36:14,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 06:36:14,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:36:14,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:36:14,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 06:36:14,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:36:14,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 5139 trivial. 0 not checked. [2022-12-14 06:36:14,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:36:14,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5385 trivial. 0 not checked. [2022-12-14 06:36:14,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950886272] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:36:14,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [576197609] [2022-12-14 06:36:14,508 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 06:36:14,508 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:36:14,508 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:36:14,508 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:36:14,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:36:14,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:14,524 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 06:36:14,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 06:36:14,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:14,539 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 06:36:14,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 06:36:14,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:14,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2022-12-14 06:36:14,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:14,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:14,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:14,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:14,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:14,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:14,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:14,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:14,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:14,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:14,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:14,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:14,628 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-12-14 06:36:14,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 41 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 308 treesize of output 288 [2022-12-14 06:36:14,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:36:14,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:14,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 06:36:14,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:14,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:36:14,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 06:36:14,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:14,794 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 06:36:14,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-12-14 06:36:14,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 06:36:14,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:36:14,891 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-12-14 06:36:14,935 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:36:22,404 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5438#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-12-14 06:36:22,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:36:22,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:36:22,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 107 [2022-12-14 06:36:22,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877713911] [2022-12-14 06:36:22,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:36:22,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-12-14 06:36:22,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:22,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-12-14 06:36:22,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5136, Invalid=9143, Unknown=1, NotChecked=0, Total=14280 [2022-12-14 06:36:22,408 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 06:36:22,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:22,515 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2022-12-14 06:36:22,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-12-14 06:36:22,515 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2022-12-14 06:36:22,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:22,516 INFO L225 Difference]: With dead ends: 155 [2022-12-14 06:36:22,516 INFO L226 Difference]: Without dead ends: 130 [2022-12-14 06:36:22,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=5136, Invalid=9143, Unknown=1, NotChecked=0, Total=14280 [2022-12-14 06:36:22,518 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:22,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:36:22,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-12-14 06:36:22,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-12-14 06:36:22,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 06:36:22,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2022-12-14 06:36:22,524 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 150 [2022-12-14 06:36:22,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:22,524 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2022-12-14 06:36:22,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 06:36:22,524 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2022-12-14 06:36:22,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-12-14 06:36:22,525 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:22,525 INFO L195 NwaCegarLoop]: trace histogram [99, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:22,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 06:36:22,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 06:36:22,727 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:36:22,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:22,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1758920132, now seen corresponding path program 9 times [2022-12-14 06:36:22,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:22,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315040742] [2022-12-14 06:36:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:22,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-12-14 06:36:27,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:27,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315040742] [2022-12-14 06:36:27,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315040742] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:36:27,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715061747] [2022-12-14 06:36:27,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:36:27,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:36:27,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:36:27,308 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:36:27,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 06:36:27,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:36:27,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:36:27,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 101 conjunts are in the unsatisfiable core [2022-12-14 06:36:27,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:36:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-12-14 06:36:27,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:36:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-12-14 06:36:30,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715061747] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:36:30,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [708290438] [2022-12-14 06:36:30,606 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 06:36:30,606 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:36:30,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:36:30,607 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:36:30,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:36:30,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:30,631 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 06:36:30,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 06:36:30,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:30,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 06:36:30,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:30,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2022-12-14 06:36:30,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:30,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:30,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:30,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:30,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:30,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:30,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:30,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:30,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:30,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:30,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:30,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:30,739 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-12-14 06:36:30,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 41 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 308 treesize of output 288 [2022-12-14 06:36:30,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:36:30,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:30,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 06:36:30,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:30,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:36:30,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 06:36:30,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:30,919 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 06:36:30,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-12-14 06:36:30,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 06:36:30,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:36:31,000 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-12-14 06:36:31,043 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:36:32,797 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7025#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (exists ((v_bAnd_~res~0_BEFORE_RETURN_53 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_53 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_53 4294967296) (+ (mod v_bAnd_~res~0_BEFORE_RETURN_53 4294967296) (- 4294967296))))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-12-14 06:36:32,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:36:32,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:36:32,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 102] total 103 [2022-12-14 06:36:32,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200581308] [2022-12-14 06:36:32,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:36:32,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-12-14 06:36:32,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:32,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-12-14 06:36:32,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5313, Invalid=8027, Unknown=0, NotChecked=0, Total=13340 [2022-12-14 06:36:32,800 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 103 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 103 states have internal predecessors, (116), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 06:36:32,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:32,902 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2022-12-14 06:36:32,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-12-14 06:36:32,902 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 103 states have internal predecessors, (116), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 155 [2022-12-14 06:36:32,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:32,903 INFO L225 Difference]: With dead ends: 160 [2022-12-14 06:36:32,903 INFO L226 Difference]: Without dead ends: 131 [2022-12-14 06:36:32,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 351 SyntacticMatches, 100 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6788 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=5313, Invalid=8027, Unknown=0, NotChecked=0, Total=13340 [2022-12-14 06:36:32,904 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:32,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:36:32,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-12-14 06:36:32,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-12-14 06:36:32,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 06:36:32,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2022-12-14 06:36:32,910 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 155 [2022-12-14 06:36:32,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:32,910 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2022-12-14 06:36:32,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 103 states have internal predecessors, (116), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 06:36:32,910 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2022-12-14 06:36:32,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 06:36:32,911 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:32,911 INFO L195 NwaCegarLoop]: trace histogram [100, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:32,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 06:36:33,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 06:36:33,113 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:36:33,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:33,114 INFO L85 PathProgramCache]: Analyzing trace with hash 406694187, now seen corresponding path program 10 times [2022-12-14 06:36:33,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:33,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218800911] [2022-12-14 06:36:33,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:33,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5605 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 5306 trivial. 0 not checked. [2022-12-14 06:36:33,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:33,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218800911] [2022-12-14 06:36:33,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218800911] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:36:33,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156902575] [2022-12-14 06:36:33,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:36:33,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:36:33,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:36:33,534 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:36:33,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 06:36:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:33,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 1202 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 06:36:33,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:36:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5605 backedges. 244 proven. 55 refuted. 0 times theorem prover too weak. 5306 trivial. 0 not checked. [2022-12-14 06:36:33,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:36:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5605 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 5306 trivial. 0 not checked. [2022-12-14 06:36:33,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156902575] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:36:33,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1136597522] [2022-12-14 06:36:33,955 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 06:36:33,955 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:36:33,955 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:36:33,956 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:36:33,956 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:36:33,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:33,975 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 06:36:33,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 06:36:33,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:33,994 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 06:36:33,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 06:36:34,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:34,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 06:36:34,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:34,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:34,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:34,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:34,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:34,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:34,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:36:34,089 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-12-14 06:36:34,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 298 treesize of output 289 [2022-12-14 06:36:34,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:36:34,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:34,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 06:36:34,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:34,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:36:34,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 06:36:34,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:34,296 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 06:36:34,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-12-14 06:36:34,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 06:36:34,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:36:34,390 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-12-14 06:36:34,433 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:36:37,170 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8552#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (exists ((v_bAnd_~res~0_BEFORE_RETURN_59 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_59 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_59 4294967296) (+ (- 4294967296) (mod v_bAnd_~res~0_BEFORE_RETURN_59 4294967296))))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-12-14 06:36:37,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:36:37,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:36:37,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-12-14 06:36:37,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851096207] [2022-12-14 06:36:37,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:36:37,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 06:36:37,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:37,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 06:36:37,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 06:36:37,172 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:36:37,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:37,201 INFO L93 Difference]: Finished difference Result 171 states and 192 transitions. [2022-12-14 06:36:37,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 06:36:37,201 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 156 [2022-12-14 06:36:37,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:37,202 INFO L225 Difference]: With dead ends: 171 [2022-12-14 06:36:37,202 INFO L226 Difference]: Without dead ends: 143 [2022-12-14 06:36:37,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 06:36:37,203 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:37,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:36:37,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-12-14 06:36:37,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-12-14 06:36:37,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0217391304347827) internal successors, (141), 138 states have internal predecessors, (141), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 06:36:37,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2022-12-14 06:36:37,213 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 156 [2022-12-14 06:36:37,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:37,213 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2022-12-14 06:36:37,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:36:37,213 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2022-12-14 06:36:37,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-12-14 06:36:37,215 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:37,216 INFO L195 NwaCegarLoop]: trace histogram [100, 66, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:37,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 06:36:37,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 06:36:37,417 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:36:37,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:37,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1679710059, now seen corresponding path program 11 times [2022-12-14 06:36:37,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:37,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375464419] [2022-12-14 06:36:37,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:37,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7423 backedges. 0 proven. 1313 refuted. 0 times theorem prover too weak. 6110 trivial. 0 not checked. [2022-12-14 06:36:38,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:38,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375464419] [2022-12-14 06:36:38,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375464419] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:36:38,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320789169] [2022-12-14 06:36:38,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:36:38,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:36:38,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:36:38,367 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:36:38,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 06:36:38,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 06:36:38,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:36:38,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 06:36:38,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:36:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7423 backedges. 1062 proven. 21 refuted. 0 times theorem prover too weak. 6340 trivial. 0 not checked. [2022-12-14 06:36:38,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:36:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7423 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7402 trivial. 0 not checked. [2022-12-14 06:36:38,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320789169] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:36:38,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [409414579] [2022-12-14 06:36:38,784 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 06:36:38,784 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:36:38,785 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:36:38,785 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:36:38,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:36:38,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:38,804 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 06:36:38,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 06:36:38,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:38,821 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 06:36:38,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 06:36:38,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:38,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 06:36:38,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:38,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:38,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:38,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:38,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:38,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:38,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:36:38,909 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-12-14 06:36:38,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 298 treesize of output 289 [2022-12-14 06:36:38,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:36:39,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:39,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 06:36:39,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:39,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:36:39,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 06:36:39,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:39,107 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 06:36:39,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-12-14 06:36:39,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 06:36:39,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:36:39,200 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-12-14 06:36:39,243 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:36:40,026 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10355#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (exists ((v_bAnd_~res~0_BEFORE_RETURN_66 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_66 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_66 4294967296) (+ (mod v_bAnd_~res~0_BEFORE_RETURN_66 4294967296) (- 4294967296))))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-12-14 06:36:40,026 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:36:40,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:36:40,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2022-12-14 06:36:40,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665745921] [2022-12-14 06:36:40,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:36:40,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 06:36:40,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:40,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 06:36:40,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=2173, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 06:36:40,028 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand has 39 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 06:36:40,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:40,080 INFO L93 Difference]: Finished difference Result 192 states and 210 transitions. [2022-12-14 06:36:40,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 06:36:40,080 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 192 [2022-12-14 06:36:40,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:40,082 INFO L225 Difference]: With dead ends: 192 [2022-12-14 06:36:40,082 INFO L226 Difference]: Without dead ends: 152 [2022-12-14 06:36:40,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 549 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=479, Invalid=2173, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 06:36:40,083 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:40,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 111 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:36:40,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-12-14 06:36:40,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-12-14 06:36:40,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0204081632653061) internal successors, (150), 147 states have internal predecessors, (150), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 06:36:40,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2022-12-14 06:36:40,088 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 192 [2022-12-14 06:36:40,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:40,088 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2022-12-14 06:36:40,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 06:36:40,089 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2022-12-14 06:36:40,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-12-14 06:36:40,090 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:40,090 INFO L195 NwaCegarLoop]: trace histogram [100, 69, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:40,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 06:36:40,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:36:40,291 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:36:40,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:40,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1000875472, now seen corresponding path program 12 times [2022-12-14 06:36:40,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:40,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452337636] [2022-12-14 06:36:40,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:40,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7717 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 6287 trivial. 0 not checked. [2022-12-14 06:36:41,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:41,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452337636] [2022-12-14 06:36:41,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452337636] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:36:41,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996465082] [2022-12-14 06:36:41,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:36:41,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:36:41,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:36:41,249 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:36:41,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 06:36:41,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:36:41,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:36:41,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 06:36:41,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:36:41,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7717 backedges. 1154 proven. 276 refuted. 0 times theorem prover too weak. 6287 trivial. 0 not checked. [2022-12-14 06:36:41,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:36:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7717 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 6287 trivial. 0 not checked. [2022-12-14 06:36:42,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996465082] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:36:42,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [258714151] [2022-12-14 06:36:42,077 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 06:36:42,077 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:36:42,078 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:36:42,078 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:36:42,078 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:36:42,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:42,098 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 06:36:42,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 06:36:42,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:42,115 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 06:36:42,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 06:36:42,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:42,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 06:36:42,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:42,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:42,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:42,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:42,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:42,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:42,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:36:42,227 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-12-14 06:36:42,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 298 treesize of output 289 [2022-12-14 06:36:42,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:36:42,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:42,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 06:36:42,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:42,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-12-14 06:36:42,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:42,452 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-12-14 06:36:42,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2022-12-14 06:36:42,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 06:36:42,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:36:42,565 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-12-14 06:36:42,619 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:36:47,380 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12296#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_bAnd_~res~0_BEFORE_RETURN_72 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_72 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_72 4294967296) (+ (mod v_bAnd_~res~0_BEFORE_RETURN_72 4294967296) (- 4294967296))))) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-12-14 06:36:47,380 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:36:47,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:36:47,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2022-12-14 06:36:47,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630390357] [2022-12-14 06:36:47,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:36:47,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 06:36:47,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:47,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 06:36:47,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 06:36:47,383 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:36:47,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:47,445 INFO L93 Difference]: Finished difference Result 226 states and 260 transitions. [2022-12-14 06:36:47,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 06:36:47,445 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 203 [2022-12-14 06:36:47,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:47,447 INFO L225 Difference]: With dead ends: 226 [2022-12-14 06:36:47,447 INFO L226 Difference]: Without dead ends: 177 [2022-12-14 06:36:47,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 571 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 06:36:47,448 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:47,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:36:47,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-12-14 06:36:47,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-12-14 06:36:47,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 06:36:47,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2022-12-14 06:36:47,455 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 203 [2022-12-14 06:36:47,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:47,455 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2022-12-14 06:36:47,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:36:47,456 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2022-12-14 06:36:47,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-12-14 06:36:47,457 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:47,457 INFO L195 NwaCegarLoop]: trace histogram [144, 100, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:47,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 06:36:47,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:36:47,658 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:36:47,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:47,660 INFO L85 PathProgramCache]: Analyzing trace with hash -539388085, now seen corresponding path program 13 times [2022-12-14 06:36:47,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:47,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917005665] [2022-12-14 06:36:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:47,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 15892 backedges. 0 proven. 5980 refuted. 0 times theorem prover too weak. 9912 trivial. 0 not checked. [2022-12-14 06:36:50,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:50,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917005665] [2022-12-14 06:36:50,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917005665] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:36:50,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756373876] [2022-12-14 06:36:50,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:36:50,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:36:50,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:36:50,415 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:36:50,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 06:36:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:50,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 1714 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 06:36:50,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:36:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 15892 backedges. 4804 proven. 1176 refuted. 0 times theorem prover too weak. 9912 trivial. 0 not checked. [2022-12-14 06:36:50,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:36:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 15892 backedges. 0 proven. 5980 refuted. 0 times theorem prover too weak. 9912 trivial. 0 not checked. [2022-12-14 06:36:52,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756373876] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:36:52,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [40990430] [2022-12-14 06:36:52,503 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 06:36:52,503 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:36:52,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:36:52,503 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:36:52,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:36:52,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:52,526 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 06:36:52,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 06:36:52,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:52,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 06:36:52,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:52,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 06:36:52,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:52,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:52,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:52,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:52,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:52,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:52,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:36:52,621 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-12-14 06:36:52,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 298 treesize of output 289 [2022-12-14 06:36:52,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:36:52,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:52,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 06:36:52,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:52,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:36:52,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 06:36:52,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:36:52,820 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 06:36:52,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-12-14 06:36:52,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 06:36:52,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:36:52,905 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-12-14 06:36:52,960 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:36:55,954 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14855#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-12-14 06:36:55,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:36:55,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:36:55,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2022-12-14 06:36:55,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141194206] [2022-12-14 06:36:55,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:36:55,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-12-14 06:36:55,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:55,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-12-14 06:36:55,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-12-14 06:36:55,957 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand has 101 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 101 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:36:56,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:56,078 INFO L93 Difference]: Finished difference Result 301 states and 360 transitions. [2022-12-14 06:36:56,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-12-14 06:36:56,079 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 101 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 278 [2022-12-14 06:36:56,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:56,080 INFO L225 Difference]: With dead ends: 301 [2022-12-14 06:36:56,080 INFO L226 Difference]: Without dead ends: 227 [2022-12-14 06:36:56,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 883 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-12-14 06:36:56,081 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:56,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:36:56,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-12-14 06:36:56,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-12-14 06:36:56,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.0135135135135136) internal successors, (225), 222 states have internal predecessors, (225), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 06:36:56,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 231 transitions. [2022-12-14 06:36:56,088 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 231 transitions. Word has length 278 [2022-12-14 06:36:56,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:56,088 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 231 transitions. [2022-12-14 06:36:56,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 101 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:36:56,088 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 231 transitions. [2022-12-14 06:36:56,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2022-12-14 06:36:56,090 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:56,090 INFO L195 NwaCegarLoop]: trace histogram [294, 100, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:56,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 06:36:56,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 06:36:56,292 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:36:56,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:56,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1693258069, now seen corresponding path program 14 times [2022-12-14 06:36:56,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:56,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378203219] [2022-12-14 06:36:56,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:56,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:05,767 INFO L134 CoverageAnalysis]: Checked inductivity of 49117 backedges. 0 proven. 24455 refuted. 0 times theorem prover too weak. 24662 trivial. 0 not checked. [2022-12-14 06:37:05,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:05,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378203219] [2022-12-14 06:37:05,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378203219] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:37:05,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588743422] [2022-12-14 06:37:05,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:37:05,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:37:05,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:37:05,769 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:37:05,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 06:37:07,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 06:37:07,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:37:07,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 06:37:07,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:37:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 49117 backedges. 19606 proven. 105 refuted. 0 times theorem prover too weak. 29406 trivial. 0 not checked. [2022-12-14 06:37:08,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:37:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 49117 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 49012 trivial. 0 not checked. [2022-12-14 06:37:08,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588743422] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:37:08,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [889602185] [2022-12-14 06:37:08,681 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 06:37:08,681 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:37:08,681 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:37:08,681 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:37:08,681 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:37:08,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:08,697 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 06:37:08,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 06:37:08,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:08,715 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 06:37:08,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 06:37:08,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:08,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 06:37:08,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:08,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:08,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:08,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:08,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:08,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:08,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:37:08,800 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-12-14 06:37:08,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 298 treesize of output 289 [2022-12-14 06:37:08,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:37:08,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:08,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 06:37:08,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:08,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:37:08,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 06:37:08,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:08,994 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 06:37:08,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-12-14 06:37:09,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 06:37:09,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:37:09,081 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-12-14 06:37:09,119 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:37:12,647 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18594#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (exists ((v_bAnd_~res~0_BEFORE_RETURN_84 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_84 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_84 4294967296) (+ (- 4294967296) (mod v_bAnd_~res~0_BEFORE_RETURN_84 4294967296))))) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-12-14 06:37:12,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:37:12,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:37:12,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 17, 17] total 131 [2022-12-14 06:37:12,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643430153] [2022-12-14 06:37:12,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:37:12,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-12-14 06:37:12,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:12,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-12-14 06:37:12,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5605, Invalid=14987, Unknown=0, NotChecked=0, Total=20592 [2022-12-14 06:37:12,651 INFO L87 Difference]: Start difference. First operand 227 states and 231 transitions. Second operand has 131 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 06:37:12,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:12,792 INFO L93 Difference]: Finished difference Result 368 states and 394 transitions. [2022-12-14 06:37:12,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-12-14 06:37:12,793 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 428 [2022-12-14 06:37:12,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:12,794 INFO L225 Difference]: With dead ends: 368 [2022-12-14 06:37:12,794 INFO L226 Difference]: Without dead ends: 244 [2022-12-14 06:37:12,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1383 GetRequests, 1241 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4808 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=5605, Invalid=14987, Unknown=0, NotChecked=0, Total=20592 [2022-12-14 06:37:12,795 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:12,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:37:12,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-12-14 06:37:12,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2022-12-14 06:37:12,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.0125523012552302) internal successors, (242), 239 states have internal predecessors, (242), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 06:37:12,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 248 transitions. [2022-12-14 06:37:12,803 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 248 transitions. Word has length 428 [2022-12-14 06:37:12,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:12,803 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 248 transitions. [2022-12-14 06:37:12,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 06:37:12,803 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 248 transitions. [2022-12-14 06:37:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-12-14 06:37:12,805 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:12,805 INFO L195 NwaCegarLoop]: trace histogram [297, 100, 30, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:37:12,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-14 06:37:13,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 06:37:13,007 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:37:13,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:13,008 INFO L85 PathProgramCache]: Analyzing trace with hash -892029040, now seen corresponding path program 15 times [2022-12-14 06:37:13,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:13,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132304056] [2022-12-14 06:37:13,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:13,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:37:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 50371 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 49906 trivial. 0 not checked. [2022-12-14 06:37:15,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:15,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132304056] [2022-12-14 06:37:15,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132304056] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:37:15,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864209433] [2022-12-14 06:37:15,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:37:15,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:37:15,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:37:15,864 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:37:15,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 06:37:16,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:37:16,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:37:16,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 2438 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 06:37:16,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:37:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 50371 backedges. 20004 proven. 465 refuted. 0 times theorem prover too weak. 29902 trivial. 0 not checked. [2022-12-14 06:37:16,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:37:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 50371 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 49906 trivial. 0 not checked. [2022-12-14 06:37:17,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864209433] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:37:17,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1178048800] [2022-12-14 06:37:17,360 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 06:37:17,360 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:37:17,360 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:37:17,360 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:37:17,360 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:37:17,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:17,379 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 06:37:17,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 06:37:17,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:17,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 06:37:17,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:17,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 06:37:17,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:17,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:17,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:17,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:17,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:17,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:17,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:37:17,468 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-12-14 06:37:17,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 34 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 298 treesize of output 289 [2022-12-14 06:37:17,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:37:17,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:17,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 06:37:17,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:17,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-12-14 06:37:17,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:17,687 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-12-14 06:37:17,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-12-14 06:37:17,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 06:37:17,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:37:17,784 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-12-14 06:37:17,839 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:37:20,871 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22549#(and (exists ((v_bAnd_~res~0_BEFORE_RETURN_89 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_89 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_89 4294967296) (+ (mod v_bAnd_~res~0_BEFORE_RETURN_89 4294967296) (- 4294967296))))) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-12-14 06:37:20,871 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:37:20,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:37:20,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-12-14 06:37:20,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077819263] [2022-12-14 06:37:20,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:37:20,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-14 06:37:20,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:20,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-14 06:37:20,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2140, Invalid=3866, Unknown=0, NotChecked=0, Total=6006 [2022-12-14 06:37:20,873 INFO L87 Difference]: Start difference. First operand 244 states and 248 transitions. Second operand has 65 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 06:37:20,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:20,927 INFO L93 Difference]: Finished difference Result 383 states and 419 transitions. [2022-12-14 06:37:20,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-12-14 06:37:20,927 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 447 [2022-12-14 06:37:20,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:20,928 INFO L225 Difference]: With dead ends: 383 [2022-12-14 06:37:20,929 INFO L226 Difference]: Without dead ends: 276 [2022-12-14 06:37:20,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1372 GetRequests, 1296 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2140, Invalid=3866, Unknown=0, NotChecked=0, Total=6006 [2022-12-14 06:37:20,929 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:20,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:37:20,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-12-14 06:37:20,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2022-12-14 06:37:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 271 states have (on average 1.011070110701107) internal successors, (274), 271 states have internal predecessors, (274), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 06:37:20,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 280 transitions. [2022-12-14 06:37:20,937 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 280 transitions. Word has length 447 [2022-12-14 06:37:20,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:20,938 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 280 transitions. [2022-12-14 06:37:20,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 06:37:20,938 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 280 transitions. [2022-12-14 06:37:20,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-12-14 06:37:20,940 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:20,940 INFO L195 NwaCegarLoop]: trace histogram [297, 100, 62, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:37:20,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 06:37:21,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:37:21,141 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:37:21,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:21,142 INFO L85 PathProgramCache]: Analyzing trace with hash -609477744, now seen corresponding path program 16 times [2022-12-14 06:37:21,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:21,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553275025] [2022-12-14 06:37:21,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:21,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:37:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 51859 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 49906 trivial. 0 not checked. [2022-12-14 06:37:27,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:27,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553275025] [2022-12-14 06:37:27,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553275025] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:37:27,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308018201] [2022-12-14 06:37:27,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:37:27,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:37:27,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:37:27,180 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:37:27,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 06:37:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:27,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 2662 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-14 06:37:27,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:37:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 51859 backedges. 20004 proven. 1953 refuted. 0 times theorem prover too weak. 29902 trivial. 0 not checked. [2022-12-14 06:37:27,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:37:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 51859 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 49906 trivial. 0 not checked. [2022-12-14 06:37:29,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308018201] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:37:29,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [809234300] [2022-12-14 06:37:29,988 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 06:37:29,988 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:37:29,988 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:37:29,988 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:37:29,988 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:37:29,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:30,006 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 06:37:30,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 06:37:30,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:30,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 06:37:30,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:30,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2022-12-14 06:37:30,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:30,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:30,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:30,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:30,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:30,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:30,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:30,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:30,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:30,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:30,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:30,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:30,101 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-12-14 06:37:30,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 41 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 13 case distinctions, treesize of input 308 treesize of output 288 [2022-12-14 06:37:30,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 06:37:30,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:30,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-12-14 06:37:30,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:30,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:37:30,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 06:37:30,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:37:30,271 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 06:37:30,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-12-14 06:37:30,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 06:37:30,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:37:30,377 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 12 for LOIs [2022-12-14 06:37:30,416 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:37:33,555 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26829#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 396 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 99 |ULTIMATE.start_main_~i~2#1|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (exists ((v_bAnd_~res~0_BEFORE_RETURN_95 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bAnd_~res~0_BEFORE_RETURN_95 4294967296) 2147483647) (mod v_bAnd_~res~0_BEFORE_RETURN_95 4294967296) (+ (mod v_bAnd_~res~0_BEFORE_RETURN_95 4294967296) (- 4294967296))))) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.base| 0))' at error location [2022-12-14 06:37:33,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:37:33,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:37:33,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 102 [2022-12-14 06:37:33,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162106401] [2022-12-14 06:37:33,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:37:33,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-12-14 06:37:33,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:33,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-12-14 06:37:33,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5211, Invalid=7899, Unknown=0, NotChecked=0, Total=13110 [2022-12-14 06:37:33,560 INFO L87 Difference]: Start difference. First operand 276 states and 280 transitions. Second operand has 102 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 102 states have internal predecessors, (117), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 06:37:33,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:33,671 INFO L93 Difference]: Finished difference Result 420 states and 461 transitions. [2022-12-14 06:37:33,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-12-14 06:37:33,671 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 102 states have internal predecessors, (117), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 479 [2022-12-14 06:37:33,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:33,674 INFO L225 Difference]: With dead ends: 420 [2022-12-14 06:37:33,674 INFO L226 Difference]: Without dead ends: 313 [2022-12-14 06:37:33,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1500 GetRequests, 1360 SyntacticMatches, 27 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3361 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=5211, Invalid=7899, Unknown=0, NotChecked=0, Total=13110 [2022-12-14 06:37:33,675 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:33,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:37:33,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-12-14 06:37:33,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2022-12-14 06:37:33,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 308 states have (on average 1.0097402597402598) internal successors, (311), 308 states have internal predecessors, (311), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 06:37:33,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 317 transitions. [2022-12-14 06:37:33,684 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 317 transitions. Word has length 479 [2022-12-14 06:37:33,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:33,684 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 317 transitions. [2022-12-14 06:37:33,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 102 states have internal predecessors, (117), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 06:37:33,685 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 317 transitions. [2022-12-14 06:37:33,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2022-12-14 06:37:33,687 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:33,687 INFO L195 NwaCegarLoop]: trace histogram [297, 100, 99, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:37:33,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 06:37:33,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24d76a3a-d5dd-437c-9806-ae1374dcaba3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:37:33,889 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:37:33,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:33,890 INFO L85 PathProgramCache]: Analyzing trace with hash -472278910, now seen corresponding path program 17 times [2022-12-14 06:37:33,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:33,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851154399] [2022-12-14 06:37:33,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:33,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:45:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 06:45:53,459 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.