./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur --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 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 --- 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-38b53e6 [2022-11-26 00:14:49,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:14:49,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:14:49,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:14:49,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:14:49,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:14:49,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:14:49,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:14:49,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:14:49,344 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:14:49,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:14:49,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:14:49,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:14:49,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:14:49,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:14:49,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:14:49,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:14:49,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:14:49,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:14:49,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:14:49,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:14:49,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:14:49,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:14:49,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:14:49,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:14:49,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:14:49,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:14:49,384 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:14:49,385 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:14:49,386 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:14:49,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:14:49,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:14:49,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:14:49,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:14:49,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:14:49,393 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:14:49,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:14:49,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:14:49,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:14:49,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:14:49,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:14:49,397 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:14:49,434 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:14:49,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:14:49,435 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:14:49,435 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:14:49,436 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:14:49,436 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:14:49,437 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:14:49,437 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:14:49,437 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:14:49,438 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:14:49,439 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:14:49,439 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:14:49,439 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:14:49,439 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:14:49,440 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:14:49,440 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:14:49,440 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:14:49,440 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:14:49,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:14:49,442 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:14:49,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:14:49,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:14:49,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:14:49,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:14:49,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:14:49,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:14:49,444 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:14:49,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:14:49,445 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:14:49,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:14:49,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:14:49,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:14:49,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:14:49,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:14:49,447 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:14:49,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:14:49,447 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:14:49,448 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:14:49,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:14:49,448 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:14:49,448 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:14:49,449 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_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 [2022-11-26 00:14:49,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:14:49,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:14:49,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:14:49,783 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:14:49,783 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:14:49,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2022-11-26 00:14:52,802 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:14:53,027 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:14:53,028 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2022-11-26 00:14:53,036 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/data/43b4c0433/2dd770fe95c84cd582a44e9a37638b85/FLAG75326f809 [2022-11-26 00:14:53,055 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/data/43b4c0433/2dd770fe95c84cd582a44e9a37638b85 [2022-11-26 00:14:53,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:14:53,061 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:14:53,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:14:53,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:14:53,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:14:53,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:14:53" (1/1) ... [2022-11-26 00:14:53,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1db44d95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:53, skipping insertion in model container [2022-11-26 00:14:53,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:14:53" (1/1) ... [2022-11-26 00:14:53,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:14:53,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:14:53,246 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_690c1093-f156-4bdc-864f-30bb8f7c6430/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2022-11-26 00:14:53,273 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:14:53,282 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:14:53,294 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_690c1093-f156-4bdc-864f-30bb8f7c6430/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2022-11-26 00:14:53,306 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:14:53,320 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:14:53,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:53 WrapperNode [2022-11-26 00:14:53,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:14:53,322 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:14:53,322 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:14:53,322 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:14:53,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:53" (1/1) ... [2022-11-26 00:14:53,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:53" (1/1) ... [2022-11-26 00:14:53,360 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 131 [2022-11-26 00:14:53,360 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:14:53,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:14:53,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:14:53,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:14:53,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:53" (1/1) ... [2022-11-26 00:14:53,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:53" (1/1) ... [2022-11-26 00:14:53,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:53" (1/1) ... [2022-11-26 00:14:53,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:53" (1/1) ... [2022-11-26 00:14:53,378 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:53" (1/1) ... [2022-11-26 00:14:53,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:53" (1/1) ... [2022-11-26 00:14:53,384 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:53" (1/1) ... [2022-11-26 00:14:53,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:53" (1/1) ... [2022-11-26 00:14:53,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:14:53,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:14:53,388 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:14:53,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:14:53,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:53" (1/1) ... [2022-11-26 00:14:53,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:14:53,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:14:53,428 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:14:53,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:14:53,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:14:53,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:14:53,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:14:53,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:14:53,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:14:53,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:14:53,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:14:53,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:14:53,559 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:14:53,561 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:14:53,808 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:14:53,903 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:14:53,904 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-26 00:14:53,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:14:53 BoogieIcfgContainer [2022-11-26 00:14:53,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:14:53,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:14:53,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:14:53,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:14:53,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:14:53" (1/3) ... [2022-11-26 00:14:53,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@169f449b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:14:53, skipping insertion in model container [2022-11-26 00:14:53,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:53" (2/3) ... [2022-11-26 00:14:53,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@169f449b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:14:53, skipping insertion in model container [2022-11-26 00:14:53,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:14:53" (3/3) ... [2022-11-26 00:14:53,915 INFO L112 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2022-11-26 00:14:53,935 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:14:53,936 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:14:54,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:14:54,024 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;@4387c9e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:14:54,024 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:14:54,028 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:54,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:14:54,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:54,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:54,042 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:54,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:54,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1379774409, now seen corresponding path program 1 times [2022-11-26 00:14:54,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:54,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324657547] [2022-11-26 00:14:54,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:54,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:54,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:54,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:54,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324657547] [2022-11-26 00:14:54,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324657547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:14:54,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:14:54,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:14:54,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004471286] [2022-11-26 00:14:54,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:14:54,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:14:54,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:54,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:14:54,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:14:54,440 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:54,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:54,506 INFO L93 Difference]: Finished difference Result 33 states and 51 transitions. [2022-11-26 00:14:54,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:14:54,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 00:14:54,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:54,517 INFO L225 Difference]: With dead ends: 33 [2022-11-26 00:14:54,517 INFO L226 Difference]: Without dead ends: 16 [2022-11-26 00:14:54,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:14:54,524 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:54,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:14:54,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-26 00:14:54,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-26 00:14:54,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:54,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 23 transitions. [2022-11-26 00:14:54,559 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 23 transitions. Word has length 9 [2022-11-26 00:14:54,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:54,559 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 23 transitions. [2022-11-26 00:14:54,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:54,560 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 23 transitions. [2022-11-26 00:14:54,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:14:54,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:54,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:54,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:14:54,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:54,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:54,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1484939476, now seen corresponding path program 1 times [2022-11-26 00:14:54,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:54,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108622927] [2022-11-26 00:14:54,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:54,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:14:54,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:54,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108622927] [2022-11-26 00:14:54,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108622927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:14:54,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:14:54,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:14:54,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185386807] [2022-11-26 00:14:54,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:14:54,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:14:54,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:54,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:14:54,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:14:54,776 INFO L87 Difference]: Start difference. First operand 16 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:54,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:54,824 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2022-11-26 00:14:54,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:14:54,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-26 00:14:54,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:54,826 INFO L225 Difference]: With dead ends: 29 [2022-11-26 00:14:54,826 INFO L226 Difference]: Without dead ends: 20 [2022-11-26 00:14:54,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:14:54,828 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:54,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 16 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:14:54,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-26 00:14:54,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2022-11-26 00:14:54,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:54,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 24 transitions. [2022-11-26 00:14:54,834 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 24 transitions. Word has length 10 [2022-11-26 00:14:54,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:54,835 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 24 transitions. [2022-11-26 00:14:54,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:54,835 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2022-11-26 00:14:54,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:14:54,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:54,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:54,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:14:54,837 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:54,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:54,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1350556832, now seen corresponding path program 1 times [2022-11-26 00:14:54,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:54,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530286985] [2022-11-26 00:14:54,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:54,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:14:54,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:54,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530286985] [2022-11-26 00:14:54,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530286985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:14:54,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:14:54,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:14:54,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984497885] [2022-11-26 00:14:54,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:14:54,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:14:54,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:54,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:14:54,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:14:54,916 INFO L87 Difference]: Start difference. First operand 17 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:54,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:54,955 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-11-26 00:14:54,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:14:54,956 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:14:54,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:54,957 INFO L225 Difference]: With dead ends: 27 [2022-11-26 00:14:54,957 INFO L226 Difference]: Without dead ends: 18 [2022-11-26 00:14:54,958 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 [2022-11-26 00:14:54,959 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:54,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 13 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:14:54,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-26 00:14:54,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-26 00:14:54,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:54,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2022-11-26 00:14:54,966 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 13 [2022-11-26 00:14:54,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:54,967 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-11-26 00:14:54,967 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:54,967 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2022-11-26 00:14:54,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:14:54,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:54,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:54,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:14:54,969 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:54,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:54,970 INFO L85 PathProgramCache]: Analyzing trace with hash 141282585, now seen corresponding path program 1 times [2022-11-26 00:14:54,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:54,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82877947] [2022-11-26 00:14:54,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:54,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:14:55,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:55,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82877947] [2022-11-26 00:14:55,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82877947] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:14:55,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071482972] [2022-11-26 00:14:55,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:55,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:55,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:14:55,299 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:14:55,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:14:55,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:55,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:14:55,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:14:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:14:55,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:14:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:14:55,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071482972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:14:55,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1989247816] [2022-11-26 00:14:55,559 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-26 00:14:55,559 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:14:55,563 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:14:55,569 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:14:55,569 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:14:55,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:55,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:55,717 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-26 00:14:55,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-26 00:14:55,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:55,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:55,847 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:14:55,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:14:55,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:55,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:55,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-26 00:14:56,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:56,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:56,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:56,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:56,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:56,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:56,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:56,176 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-26 00:14:56,178 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 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-26 00:14:56,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:56,360 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-26 00:14:56,361 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-26 00:14:56,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:56,492 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:14:56,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:14:56,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:56,625 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:14:56,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 30 [2022-11-26 00:14:57,249 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:14:58,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1989247816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:14:58,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:14:58,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 3, 3] total 12 [2022-11-26 00:14:58,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880948831] [2022-11-26 00:14:58,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:14:58,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:14:58,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:58,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:14:58,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:14:58,754 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:59,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:59,395 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2022-11-26 00:14:59,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:14:59,396 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-26 00:14:59,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:59,397 INFO L225 Difference]: With dead ends: 38 [2022-11-26 00:14:59,397 INFO L226 Difference]: Without dead ends: 24 [2022-11-26 00:14:59,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:14:59,399 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:59,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 15 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:14:59,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-26 00:14:59,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-11-26 00:14:59,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:59,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2022-11-26 00:14:59,424 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 15 [2022-11-26 00:14:59,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:59,425 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2022-11-26 00:14:59,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:59,425 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2022-11-26 00:14:59,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:14:59,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:59,426 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:59,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 00:14:59,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:59,632 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:59,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:59,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1119880071, now seen corresponding path program 1 times [2022-11-26 00:14:59,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:59,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216925256] [2022-11-26 00:14:59,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:59,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:14:59,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:59,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216925256] [2022-11-26 00:14:59,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216925256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:14:59,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098676124] [2022-11-26 00:14:59,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:59,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:59,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:14:59,843 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:14:59,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:14:59,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:59,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:14:59,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:14:59,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:14:59,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:14:59,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:14:59,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098676124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:14:59,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1556930362] [2022-11-26 00:15:00,003 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-26 00:15:00,003 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:15:00,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:15:00,004 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:15:00,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:15:00,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:00,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:00,094 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-26 00:15:00,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-26 00:15:00,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:00,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:00,194 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:15:00,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:15:00,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:00,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:00,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-26 00:15:00,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:00,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:00,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:00,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:00,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:00,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:00,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:00,401 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-26 00:15:00,402 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 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-26 00:15:00,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:00,515 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-26 00:15:00,515 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-26 00:15:00,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:00,592 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:15:00,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:15:00,764 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:00,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:01,118 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:01,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:01,283 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:01,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:01,486 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:15:02,546 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '551#(and (not (< (+ |ULTIMATE.start_main_~pos~0#1| 1) ~SIZE~0)) (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:15:02,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:15:02,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:15:02,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-11-26 00:15:02,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931594745] [2022-11-26 00:15:02,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:02,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:15:02,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:02,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:15:02,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:15:02,548 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:02,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:02,758 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2022-11-26 00:15:02,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:15:02,759 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-26 00:15:02,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:02,760 INFO L225 Difference]: With dead ends: 84 [2022-11-26 00:15:02,760 INFO L226 Difference]: Without dead ends: 65 [2022-11-26 00:15:02,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:15:02,761 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 95 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:02,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 37 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:15:02,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-26 00:15:02,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 30. [2022-11-26 00:15:02,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:02,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-11-26 00:15:02,775 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 19 [2022-11-26 00:15:02,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:02,775 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-11-26 00:15:02,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:02,776 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-11-26 00:15:02,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 00:15:02,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:02,776 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:02,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:02,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:02,989 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:15:02,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:02,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1902894455, now seen corresponding path program 2 times [2022-11-26 00:15:02,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:02,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434741558] [2022-11-26 00:15:02,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:02,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:15:03,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:03,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434741558] [2022-11-26 00:15:03,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434741558] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:03,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966355183] [2022-11-26 00:15:03,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:15:03,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:03,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:03,183 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:03,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:15:03,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:15:03,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:15:03,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:15:03,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:03,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:15:03,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:03,552 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-26 00:15:03,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2022-11-26 00:15:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:15:03,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966355183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:03,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1072384811] [2022-11-26 00:15:03,577 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-26 00:15:03,577 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:15:03,577 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:15:03,577 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:15:03,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:15:03,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:03,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:03,650 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-26 00:15:03,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-26 00:15:03,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:03,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:03,740 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:15:03,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:15:03,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:03,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:03,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-26 00:15:03,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:03,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:03,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:03,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:03,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:03,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:03,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:03,921 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-26 00:15:03,922 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 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-26 00:15:04,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:04,018 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-26 00:15:04,019 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-26 00:15:04,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:04,086 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:15:04,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:15:04,250 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:04,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:04,628 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:04,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:04,778 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:04,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:05,040 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:15:06,279 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '904#(and (not (< (+ |ULTIMATE.start_main_~pos~0#1| 1) ~SIZE~0)) (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:15:06,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:15:06,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:15:06,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2022-11-26 00:15:06,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715084772] [2022-11-26 00:15:06,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:06,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 00:15:06,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:06,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 00:15:06,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-11-26 00:15:06,282 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:06,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:06,731 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2022-11-26 00:15:06,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 00:15:06,732 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-26 00:15:06,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:06,732 INFO L225 Difference]: With dead ends: 71 [2022-11-26 00:15:06,732 INFO L226 Difference]: Without dead ends: 47 [2022-11-26 00:15:06,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=238, Invalid=1568, Unknown=0, NotChecked=0, Total=1806 [2022-11-26 00:15:06,735 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:06,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 57 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:15:06,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-26 00:15:06,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2022-11-26 00:15:06,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-11-26 00:15:06,748 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 23 [2022-11-26 00:15:06,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:06,748 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-11-26 00:15:06,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:06,749 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-11-26 00:15:06,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 00:15:06,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:06,749 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:06,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:06,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 00:15:06,955 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:15:06,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:06,956 INFO L85 PathProgramCache]: Analyzing trace with hash -346550703, now seen corresponding path program 1 times [2022-11-26 00:15:06,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:06,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618476402] [2022-11-26 00:15:06,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:06,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:15:07,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:07,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618476402] [2022-11-26 00:15:07,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618476402] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:07,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024543381] [2022-11-26 00:15:07,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:07,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:07,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:07,143 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:07,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:15:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:07,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:15:07,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:07,343 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:15:07,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:15:07,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024543381] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:07,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [46306285] [2022-11-26 00:15:07,424 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-26 00:15:07,425 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:15:07,425 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:15:07,425 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:15:07,426 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:15:07,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:07,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:07,518 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:15:07,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:15:07,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:07,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:07,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-26 00:15:07,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:07,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:07,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-26 00:15:07,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:07,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:07,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:07,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:07,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:07,749 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-26 00:15:07,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-26 00:15:08,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:08,082 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-26 00:15:08,083 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-26 00:15:08,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:08,146 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:15:08,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 30 [2022-11-26 00:15:08,286 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:08,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:08,596 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:08,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:08,724 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:08,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:08,905 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 [2022-11-26 00:15:08,933 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 0 case distinctions, treesize of input 95 treesize of output 88 [2022-11-26 00:15:08,964 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 [2022-11-26 00:15:09,030 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:15:10,060 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1279#(and (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:15:10,060 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:15:10,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:15:10,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-11-26 00:15:10,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063810618] [2022-11-26 00:15:10,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:10,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:15:10,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:10,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:15:10,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2022-11-26 00:15:10,063 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:10,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:10,188 INFO L93 Difference]: Finished difference Result 71 states and 95 transitions. [2022-11-26 00:15:10,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:15:10,189 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-26 00:15:10,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:10,189 INFO L225 Difference]: With dead ends: 71 [2022-11-26 00:15:10,189 INFO L226 Difference]: Without dead ends: 43 [2022-11-26 00:15:10,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2022-11-26 00:15:10,191 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:10,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 32 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:15:10,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-26 00:15:10,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-11-26 00:15:10,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:10,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2022-11-26 00:15:10,205 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 25 [2022-11-26 00:15:10,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:10,206 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2022-11-26 00:15:10,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:10,206 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2022-11-26 00:15:10,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-26 00:15:10,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:10,207 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:10,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:10,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:10,413 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:15:10,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:10,414 INFO L85 PathProgramCache]: Analyzing trace with hash -85398682, now seen corresponding path program 2 times [2022-11-26 00:15:10,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:10,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009418433] [2022-11-26 00:15:10,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:10,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:15:10,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:10,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009418433] [2022-11-26 00:15:10,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009418433] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:10,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743326020] [2022-11-26 00:15:10,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:15:10,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:10,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:10,818 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:10,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:15:10,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:15:10,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:15:10,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:15:10,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:11,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-11-26 00:15:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-26 00:15:11,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:11,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2022-11-26 00:15:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-26 00:15:11,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743326020] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:11,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1453592516] [2022-11-26 00:15:11,271 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-26 00:15:11,271 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:15:11,272 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:15:11,272 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:15:11,272 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:15:11,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:11,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:11,357 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:15:11,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:15:11,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:11,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:11,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-26 00:15:11,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:11,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:11,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-26 00:15:11,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:11,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:11,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:11,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:11,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:11,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:11,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:11,541 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-26 00:15:11,542 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 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-26 00:15:11,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:11,640 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-26 00:15:11,640 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-26 00:15:11,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:11,710 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:15:11,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:15:11,853 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:11,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:12,148 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:12,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:12,275 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:12,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:12,420 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 [2022-11-26 00:15:12,452 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 0 case distinctions, treesize of input 95 treesize of output 88 [2022-11-26 00:15:12,486 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 [2022-11-26 00:15:12,559 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:15:13,865 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1698#(and (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:15:13,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:15:13,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:15:13,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 26 [2022-11-26 00:15:13,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109487997] [2022-11-26 00:15:13,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:13,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-26 00:15:13,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:13,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-26 00:15:13,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=1104, Unknown=0, NotChecked=0, Total=1482 [2022-11-26 00:15:13,868 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:16,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:16,258 INFO L93 Difference]: Finished difference Result 387 states and 461 transitions. [2022-11-26 00:15:16,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-26 00:15:16,258 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-26 00:15:16,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:16,262 INFO L225 Difference]: With dead ends: 387 [2022-11-26 00:15:16,262 INFO L226 Difference]: Without dead ends: 359 [2022-11-26 00:15:16,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4015 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3042, Invalid=8300, Unknown=0, NotChecked=0, Total=11342 [2022-11-26 00:15:16,266 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 928 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:16,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [928 Valid, 143 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:15:16,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-11-26 00:15:16,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 73. [2022-11-26 00:15:16,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3333333333333333) internal successors, (96), 72 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:16,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2022-11-26 00:15:16,313 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 32 [2022-11-26 00:15:16,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:16,314 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2022-11-26 00:15:16,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:16,314 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2022-11-26 00:15:16,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-26 00:15:16,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:16,316 INFO L195 NwaCegarLoop]: trace histogram [16, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:16,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:16,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:16,522 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:15:16,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:16,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1069550116, now seen corresponding path program 3 times [2022-11-26 00:15:16,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:16,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512058893] [2022-11-26 00:15:16,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:16,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:17,177 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-26 00:15:17,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:17,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512058893] [2022-11-26 00:15:17,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512058893] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:17,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053916909] [2022-11-26 00:15:17,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:15:17,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:17,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:17,179 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:17,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:15:17,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:15:17,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:15:17,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-26 00:15:17,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:17,523 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2022-11-26 00:15:17,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 64 [2022-11-26 00:15:17,705 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2022-11-26 00:15:17,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 71 [2022-11-26 00:15:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-11-26 00:15:17,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:18,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-11-26 00:15:18,281 INFO L321 Elim1Store]: treesize reduction 5, result has 78.3 percent of original size [2022-11-26 00:15:18,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 396 treesize of output 301 [2022-11-26 00:15:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-11-26 00:15:18,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053916909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:18,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1292096825] [2022-11-26 00:15:18,370 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-26 00:15:18,370 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:15:18,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:15:18,370 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:15:18,371 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:15:18,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:18,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:18,459 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:15:18,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:15:18,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:18,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:18,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-26 00:15:18,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:18,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:18,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-26 00:15:18,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:18,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:18,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:18,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:18,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:18,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:18,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:18,648 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-26 00:15:18,649 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 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-26 00:15:18,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:18,775 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-26 00:15:18,776 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-26 00:15:18,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:18,853 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:15:18,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:15:19,015 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:19,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:19,337 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:19,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:19,455 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:19,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:19,564 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 [2022-11-26 00:15:19,596 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 0 case distinctions, treesize of input 95 treesize of output 88 [2022-11-26 00:15:19,624 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 [2022-11-26 00:15:19,687 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:15:21,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2785#(and (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:15:21,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:15:21,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:15:21,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 35 [2022-11-26 00:15:21,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611770637] [2022-11-26 00:15:21,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:21,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-26 00:15:21,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:21,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-26 00:15:21,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=1810, Unknown=0, NotChecked=0, Total=2162 [2022-11-26 00:15:21,076 INFO L87 Difference]: Start difference. First operand 73 states and 96 transitions. Second operand has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:23,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:23,883 INFO L93 Difference]: Finished difference Result 189 states and 238 transitions. [2022-11-26 00:15:23,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-26 00:15:23,884 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-26 00:15:23,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:23,885 INFO L225 Difference]: With dead ends: 189 [2022-11-26 00:15:23,885 INFO L226 Difference]: Without dead ends: 134 [2022-11-26 00:15:23,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=642, Invalid=4050, Unknown=0, NotChecked=0, Total=4692 [2022-11-26 00:15:23,888 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 131 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:23,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 167 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:15:23,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-26 00:15:23,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 92. [2022-11-26 00:15:23,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2747252747252746) internal successors, (116), 91 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:23,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2022-11-26 00:15:23,937 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 38 [2022-11-26 00:15:23,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:23,937 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2022-11-26 00:15:23,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:23,938 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2022-11-26 00:15:23,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-26 00:15:23,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:23,939 INFO L195 NwaCegarLoop]: trace histogram [17, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:23,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-26 00:15:24,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:24,145 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:15:24,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:24,145 INFO L85 PathProgramCache]: Analyzing trace with hash -873479051, now seen corresponding path program 1 times [2022-11-26 00:15:24,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:24,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80488751] [2022-11-26 00:15:24,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:24,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:15:24,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:24,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80488751] [2022-11-26 00:15:24,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80488751] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:24,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253225212] [2022-11-26 00:15:24,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:24,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:24,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:24,871 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:24,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:15:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:25,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:15:25,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:25,403 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:15:25,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:15:25,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253225212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:25,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [586268316] [2022-11-26 00:15:25,957 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:15:25,958 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:15:25,958 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:15:25,958 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:15:25,958 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:15:25,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:25,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:26,044 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:15:26,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:15:26,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:26,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:26,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-26 00:15:26,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:26,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:26,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-26 00:15:26,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:26,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:26,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:26,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:26,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:26,238 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-26 00:15:26,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-26 00:15:26,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:26,572 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-26 00:15:26,573 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-26 00:15:26,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:26,634 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:15:26,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:15:26,768 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:26,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:27,055 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:27,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:27,191 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:27,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:27,362 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 [2022-11-26 00:15:27,392 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 0 case distinctions, treesize of input 95 treesize of output 88 [2022-11-26 00:15:27,419 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 [2022-11-26 00:15:27,650 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:15:29,100 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3636#(and (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:15:29,100 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:15:29,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:15:29,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2022-11-26 00:15:29,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347125876] [2022-11-26 00:15:29,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:29,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-26 00:15:29,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:29,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-26 00:15:29,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=3236, Unknown=0, NotChecked=0, Total=4692 [2022-11-26 00:15:29,104 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand has 56 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 55 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:29,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:29,269 INFO L93 Difference]: Finished difference Result 188 states and 254 transitions. [2022-11-26 00:15:29,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-26 00:15:29,270 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 55 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-26 00:15:29,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:29,271 INFO L225 Difference]: With dead ends: 188 [2022-11-26 00:15:29,271 INFO L226 Difference]: Without dead ends: 115 [2022-11-26 00:15:29,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1456, Invalid=3236, Unknown=0, NotChecked=0, Total=4692 [2022-11-26 00:15:29,273 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:29,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 32 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:15:29,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-26 00:15:29,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2022-11-26 00:15:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.2272727272727273) internal successors, (135), 110 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:29,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 135 transitions. [2022-11-26 00:15:29,315 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 135 transitions. Word has length 42 [2022-11-26 00:15:29,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:29,316 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 135 transitions. [2022-11-26 00:15:29,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 55 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:29,316 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 135 transitions. [2022-11-26 00:15:29,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-26 00:15:29,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:29,318 INFO L195 NwaCegarLoop]: trace histogram [36, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:29,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-26 00:15:29,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:15:29,524 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:15:29,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:29,525 INFO L85 PathProgramCache]: Analyzing trace with hash -359713856, now seen corresponding path program 2 times [2022-11-26 00:15:29,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:29,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210933390] [2022-11-26 00:15:29,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:29,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:15:31,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:31,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210933390] [2022-11-26 00:15:31,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210933390] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:31,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722664842] [2022-11-26 00:15:31,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:15:31,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:31,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:31,342 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:31,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:15:31,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:15:31,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:15:31,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:15:31,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2022-11-26 00:15:31,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2022-11-26 00:15:31,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722664842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:31,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [578464271] [2022-11-26 00:15:31,900 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:15:31,900 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:15:31,900 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:15:31,900 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:15:31,900 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:15:31,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:31,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:31,979 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:15:31,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:15:31,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:31,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:31,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-26 00:15:32,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:32,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:32,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-26 00:15:32,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:32,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:32,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:32,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:32,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:32,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:32,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:32,153 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-26 00:15:32,153 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 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-26 00:15:32,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:32,235 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-26 00:15:32,235 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-26 00:15:32,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:32,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:32,454 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:15:32,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-11-26 00:15:32,744 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:32,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:32,875 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:32,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:33,008 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 [2022-11-26 00:15:33,063 INFO L321 Elim1Store]: treesize reduction 71, result has 38.3 percent of original size [2022-11-26 00:15:33,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 124 [2022-11-26 00:15:33,118 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-11-26 00:15:33,120 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-11-26 00:15:33,137 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 [2022-11-26 00:15:33,327 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:15:35,001 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4612#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:15:35,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:15:35,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:15:35,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 5, 5] total 46 [2022-11-26 00:15:35,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952974006] [2022-11-26 00:15:35,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:35,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-26 00:15:35,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:35,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-26 00:15:35,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=856, Invalid=2684, Unknown=0, NotChecked=0, Total=3540 [2022-11-26 00:15:35,005 INFO L87 Difference]: Start difference. First operand 111 states and 135 transitions. Second operand has 47 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 46 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:36,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:36,870 INFO L93 Difference]: Finished difference Result 453 states and 538 transitions. [2022-11-26 00:15:36,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-26 00:15:36,871 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 46 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-26 00:15:36,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:36,873 INFO L225 Difference]: With dead ends: 453 [2022-11-26 00:15:36,873 INFO L226 Difference]: Without dead ends: 380 [2022-11-26 00:15:36,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2065 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2362, Invalid=7340, Unknown=0, NotChecked=0, Total=9702 [2022-11-26 00:15:36,876 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 923 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:36,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 159 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:15:36,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-11-26 00:15:36,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 140. [2022-11-26 00:15:36,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.2661870503597121) internal successors, (176), 139 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:36,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2022-11-26 00:15:36,925 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 61 [2022-11-26 00:15:36,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:36,925 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2022-11-26 00:15:36,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 46 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:36,926 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2022-11-26 00:15:36,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-26 00:15:36,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:36,930 INFO L195 NwaCegarLoop]: trace histogram [37, 6, 6, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:36,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:37,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 00:15:37,136 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:15:37,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:37,137 INFO L85 PathProgramCache]: Analyzing trace with hash 160443957, now seen corresponding path program 3 times [2022-11-26 00:15:37,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:37,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184165970] [2022-11-26 00:15:37,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:37,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-26 00:15:39,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:39,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184165970] [2022-11-26 00:15:39,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184165970] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:39,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344682656] [2022-11-26 00:15:39,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:15:39,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:39,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:39,160 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:39,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:15:39,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:15:39,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:15:39,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-26 00:15:39,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:39,662 INFO L321 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2022-11-26 00:15:39,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 66 [2022-11-26 00:15:39,827 INFO L321 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2022-11-26 00:15:39,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 68 [2022-11-26 00:15:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2022-11-26 00:15:40,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:40,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-11-26 00:15:40,498 INFO L321 Elim1Store]: treesize reduction 5, result has 76.2 percent of original size [2022-11-26 00:15:40,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 77 [2022-11-26 00:15:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2022-11-26 00:15:40,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344682656] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:40,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [616017992] [2022-11-26 00:15:40,549 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:15:40,549 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:15:40,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:15:40,549 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:15:40,550 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:15:40,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:40,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:40,636 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:15:40,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:15:40,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:40,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:40,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-26 00:15:40,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:40,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:40,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-26 00:15:40,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:40,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:40,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:40,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:40,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:40,818 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-26 00:15:40,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-26 00:15:41,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:41,147 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-26 00:15:41,147 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-26 00:15:41,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:41,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:41,326 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:15:41,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-11-26 00:15:41,579 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:41,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:41,711 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:41,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:41,826 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 [2022-11-26 00:15:41,853 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 0 case distinctions, treesize of input 95 treesize of output 88 [2022-11-26 00:15:41,879 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 [2022-11-26 00:15:42,033 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:15:43,791 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6155#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:15:43,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:15:43,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:15:43,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 12, 12] total 57 [2022-11-26 00:15:43,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805375145] [2022-11-26 00:15:43,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:43,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-26 00:15:43,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:43,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-26 00:15:43,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=915, Invalid=3915, Unknown=0, NotChecked=0, Total=4830 [2022-11-26 00:15:43,796 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand has 57 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 57 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:48,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:48,841 INFO L93 Difference]: Finished difference Result 284 states and 358 transitions. [2022-11-26 00:15:48,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-26 00:15:48,841 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 57 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-26 00:15:48,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:48,843 INFO L225 Difference]: With dead ends: 284 [2022-11-26 00:15:48,843 INFO L226 Difference]: Without dead ends: 183 [2022-11-26 00:15:48,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1884 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1234, Invalid=6956, Unknown=0, NotChecked=0, Total=8190 [2022-11-26 00:15:48,846 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 81 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:48,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 148 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:15:48,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-26 00:15:48,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 149. [2022-11-26 00:15:48,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.2567567567567568) internal successors, (186), 148 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:48,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 186 transitions. [2022-11-26 00:15:48,889 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 186 transitions. Word has length 74 [2022-11-26 00:15:48,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:48,890 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 186 transitions. [2022-11-26 00:15:48,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 57 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:48,890 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 186 transitions. [2022-11-26 00:15:48,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-26 00:15:48,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:48,891 INFO L195 NwaCegarLoop]: trace histogram [38, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:48,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:49,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 00:15:49,095 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:15:49,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:49,096 INFO L85 PathProgramCache]: Analyzing trace with hash -2012434249, now seen corresponding path program 4 times [2022-11-26 00:15:49,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:49,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468317864] [2022-11-26 00:15:49,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:49,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-26 00:15:51,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:51,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468317864] [2022-11-26 00:15:51,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468317864] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:51,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664124544] [2022-11-26 00:15:51,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:15:51,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:51,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:51,099 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:51,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:15:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:51,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-26 00:15:51,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-26 00:15:52,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-26 00:15:54,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664124544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:54,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [555044792] [2022-11-26 00:15:54,652 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-26 00:15:54,652 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:15:54,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:15:54,653 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:15:54,653 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:15:54,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:54,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:54,732 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:15:54,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:15:54,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:54,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:54,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-26 00:15:54,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:54,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:54,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-26 00:15:54,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:54,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:54,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:54,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:54,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:54,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:54,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:54,919 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-26 00:15:54,920 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 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-26 00:15:54,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:55,001 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-26 00:15:55,001 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-26 00:15:55,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:55,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:55,165 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:15:55,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-11-26 00:15:55,458 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:55,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:55,582 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:15:55,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:15:55,751 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 [2022-11-26 00:15:55,809 INFO L321 Elim1Store]: treesize reduction 79, result has 31.3 percent of original size [2022-11-26 00:15:55,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 116 [2022-11-26 00:15:55,862 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-11-26 00:15:55,873 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 [2022-11-26 00:15:55,938 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:15:57,233 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7554#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:15:57,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:15:57,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:15:57,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 118 [2022-11-26 00:15:57,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79992268] [2022-11-26 00:15:57,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:57,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-11-26 00:15:57,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:57,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-11-26 00:15:57,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6713, Invalid=10317, Unknown=0, NotChecked=0, Total=17030 [2022-11-26 00:15:57,239 INFO L87 Difference]: Start difference. First operand 149 states and 186 transitions. Second operand has 119 states, 119 states have (on average 1.134453781512605) internal successors, (135), 118 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:57,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:57,525 INFO L93 Difference]: Finished difference Result 303 states and 416 transitions. [2022-11-26 00:15:57,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-26 00:15:57,526 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.134453781512605) internal successors, (135), 118 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-11-26 00:15:57,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:57,527 INFO L225 Difference]: With dead ends: 303 [2022-11-26 00:15:57,527 INFO L226 Difference]: Without dead ends: 194 [2022-11-26 00:15:57,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8429 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6713, Invalid=10317, Unknown=0, NotChecked=0, Total=17030 [2022-11-26 00:15:57,530 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:57,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 37 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:15:57,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-26 00:15:57,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 189. [2022-11-26 00:15:57,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.202127659574468) internal successors, (226), 188 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:57,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 226 transitions. [2022-11-26 00:15:57,610 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 226 transitions. Word has length 75 [2022-11-26 00:15:57,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:57,610 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 226 transitions. [2022-11-26 00:15:57,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.134453781512605) internal successors, (135), 118 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:57,611 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 226 transitions. [2022-11-26 00:15:57,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-26 00:15:57,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:57,612 INFO L195 NwaCegarLoop]: trace histogram [78, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:57,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:57,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 00:15:57,819 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:15:57,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:57,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1099479753, now seen corresponding path program 5 times [2022-11-26 00:15:57,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:57,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926497255] [2022-11-26 00:15:57,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:57,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3156 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-26 00:16:03,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:16:03,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926497255] [2022-11-26 00:16:03,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926497255] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:16:03,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840431818] [2022-11-26 00:16:03,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:16:03,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:16:03,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:16:03,844 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:16:03,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:16:04,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:16:04,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:16:04,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-26 00:16:04,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:16:04,907 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:16:04,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-11-26 00:16:05,004 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:16:05,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 33 [2022-11-26 00:16:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3156 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3142 trivial. 0 not checked. [2022-11-26 00:16:05,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:16:09,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-11-26 00:16:09,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:16:09,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 64 [2022-11-26 00:16:10,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3156 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3142 trivial. 0 not checked. [2022-11-26 00:16:10,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840431818] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:16:10,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [211088669] [2022-11-26 00:16:10,299 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-26 00:16:10,300 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:16:10,300 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:16:10,300 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:16:10,300 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:16:10,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:10,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:10,378 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:16:10,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:16:10,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:10,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:10,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-26 00:16:10,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:10,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:10,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-26 00:16:10,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:10,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:10,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:10,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:10,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:10,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:10,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:10,530 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-26 00:16:10,531 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 7 case distinctions, treesize of input 374 treesize of output 342 [2022-11-26 00:16:10,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:10,608 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-26 00:16:10,609 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-26 00:16:10,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:10,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:16:10,766 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:16:10,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-11-26 00:16:11,231 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:16:11,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:16:11,474 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:16:11,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:16:11,603 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 [2022-11-26 00:16:11,659 INFO L321 Elim1Store]: treesize reduction 79, result has 31.3 percent of original size [2022-11-26 00:16:11,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 116 [2022-11-26 00:16:11,707 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-11-26 00:16:11,716 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 [2022-11-26 00:16:11,840 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:16:13,594 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9267#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:16:13,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:16:13,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:16:13,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 10, 10] total 98 [2022-11-26 00:16:13,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034801901] [2022-11-26 00:16:13,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:16:13,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-11-26 00:16:13,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:16:13,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-11-26 00:16:13,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3875, Invalid=8332, Unknown=3, NotChecked=0, Total=12210 [2022-11-26 00:16:13,599 INFO L87 Difference]: Start difference. First operand 189 states and 226 transitions. Second operand has 99 states, 99 states have (on average 1.3636363636363635) internal successors, (135), 98 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:16:45,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:45,991 INFO L93 Difference]: Finished difference Result 888 states and 1038 transitions. [2022-11-26 00:16:45,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 342 states. [2022-11-26 00:16:45,991 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.3636363636363635) internal successors, (135), 98 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-11-26 00:16:45,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:45,995 INFO L225 Difference]: With dead ends: 888 [2022-11-26 00:16:45,995 INFO L226 Difference]: Without dead ends: 779 [2022-11-26 00:16:46,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 757 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 443 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65036 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=40857, Invalid=156717, Unknown=6, NotChecked=0, Total=197580 [2022-11-26 00:16:46,012 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2381 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2381 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:46,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2381 Valid, 314 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-26 00:16:46,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-11-26 00:16:46,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 196. [2022-11-26 00:16:46,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.2153846153846153) internal successors, (237), 195 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:16:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 237 transitions. [2022-11-26 00:16:46,081 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 237 transitions. Word has length 115 [2022-11-26 00:16:46,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:46,081 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 237 transitions. [2022-11-26 00:16:46,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.3636363636363635) internal successors, (135), 98 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:16:46,082 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 237 transitions. [2022-11-26 00:16:46,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-26 00:16:46,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:46,083 INFO L195 NwaCegarLoop]: trace histogram [79, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:16:46,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:16:46,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:16:46,284 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:16:46,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:46,285 INFO L85 PathProgramCache]: Analyzing trace with hash 777524853, now seen corresponding path program 4 times [2022-11-26 00:16:46,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:16:46,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361308524] [2022-11-26 00:16:46,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:46,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:16:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3231 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-26 00:16:52,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:16:52,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361308524] [2022-11-26 00:16:52,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361308524] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:16:52,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219502748] [2022-11-26 00:16:52,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:16:52,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:16:52,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:16:52,152 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:16:52,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:16:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:52,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 1675 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-26 00:16:52,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:16:56,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3231 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-26 00:16:56,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:05,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3231 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-26 00:17:05,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219502748] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:05,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [915710038] [2022-11-26 00:17:05,333 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:17:05,333 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:17:05,334 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:17:05,334 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:17:05,334 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:17:05,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:05,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:05,408 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-26 00:17:05,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-26 00:17:05,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:05,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:05,487 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:17:05,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:17:05,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:05,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:05,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-26 00:17:05,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:05,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:05,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:05,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:05,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:05,653 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-26 00:17:05,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-26 00:17:05,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:05,939 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-26 00:17:05,940 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-26 00:17:06,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:06,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:06,116 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:17:06,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-11-26 00:17:06,448 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:17:06,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:17:06,628 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:17:06,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:17:06,729 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 [2022-11-26 00:17:06,760 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 0 case distinctions, treesize of input 95 treesize of output 88 [2022-11-26 00:17:06,789 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 [2022-11-26 00:17:06,981 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:17:09,269 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12574#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:17:09,269 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:17:09,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:17:09,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 241 [2022-11-26 00:17:09,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313404758] [2022-11-26 00:17:09,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:17:09,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 242 states [2022-11-26 00:17:09,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:09,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 242 interpolants. [2022-11-26 00:17:09,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26129, Invalid=38641, Unknown=0, NotChecked=0, Total=64770 [2022-11-26 00:17:09,282 INFO L87 Difference]: Start difference. First operand 196 states and 237 transitions. Second operand has 242 states, 242 states have (on average 1.0743801652892562) internal successors, (260), 241 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:10,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:10,057 INFO L93 Difference]: Finished difference Result 396 states and 558 transitions. [2022-11-26 00:17:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-11-26 00:17:10,058 INFO L78 Accepts]: Start accepts. Automaton has has 242 states, 242 states have (on average 1.0743801652892562) internal successors, (260), 241 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2022-11-26 00:17:10,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:10,059 INFO L225 Difference]: With dead ends: 396 [2022-11-26 00:17:10,060 INFO L226 Difference]: Without dead ends: 281 [2022-11-26 00:17:10,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30564 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=26129, Invalid=38641, Unknown=0, NotChecked=0, Total=64770 [2022-11-26 00:17:10,066 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:10,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 33 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:17:10,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-11-26 00:17:10,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 277. [2022-11-26 00:17:10,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.1521739130434783) internal successors, (318), 276 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:10,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 318 transitions. [2022-11-26 00:17:10,218 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 318 transitions. Word has length 118 [2022-11-26 00:17:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:10,219 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 318 transitions. [2022-11-26 00:17:10,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 242 states, 242 states have (on average 1.0743801652892562) internal successors, (260), 241 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:10,220 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 318 transitions. [2022-11-26 00:17:10,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-26 00:17:10,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:10,223 INFO L195 NwaCegarLoop]: trace histogram [160, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:10,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:10,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 00:17:10,431 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:10,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:10,431 INFO L85 PathProgramCache]: Analyzing trace with hash 168583840, now seen corresponding path program 5 times [2022-11-26 00:17:10,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:10,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306519219] [2022-11-26 00:17:10,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:10,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12951 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-26 00:17:32,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:32,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306519219] [2022-11-26 00:17:32,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306519219] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:17:32,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364477663] [2022-11-26 00:17:32,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:17:32,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:32,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:32,147 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:32,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:17:32,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 00:17:32,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:17:32,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:17:32,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:33,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-11-26 00:17:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12951 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12933 trivial. 0 not checked. [2022-11-26 00:17:33,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12951 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12933 trivial. 0 not checked. [2022-11-26 00:17:35,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364477663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:35,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [998743942] [2022-11-26 00:17:35,695 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:17:35,695 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:17:35,696 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:17:35,696 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:17:35,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:17:35,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:35,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:35,767 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-26 00:17:35,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-26 00:17:35,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:35,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:35,903 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-26 00:17:35,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-26 00:17:35,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:35,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:35,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-26 00:17:36,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:36,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:36,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:36,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:36,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:36,086 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-26 00:17:36,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 354 treesize of output 344 [2022-11-26 00:17:36,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:36,390 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-26 00:17:36,390 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-26 00:17:36,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:36,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:36,566 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-26 00:17:36,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-11-26 00:17:36,837 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:17:36,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:17:36,963 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-26 00:17:36,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:17:37,073 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 [2022-11-26 00:17:37,128 INFO L321 Elim1Store]: treesize reduction 79, result has 31.3 percent of original size [2022-11-26 00:17:37,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 116 [2022-11-26 00:17:37,167 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-11-26 00:17:37,177 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 [2022-11-26 00:17:37,337 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:17:40,829 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15239#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:17:40,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:17:40,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:17:40,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [162, 12, 12] total 183 [2022-11-26 00:17:40,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029405505] [2022-11-26 00:17:40,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:17:40,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 184 states [2022-11-26 00:17:40,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:40,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2022-11-26 00:17:40,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15586, Invalid=23026, Unknown=0, NotChecked=0, Total=38612 [2022-11-26 00:17:40,838 INFO L87 Difference]: Start difference. First operand 277 states and 318 transitions. Second operand has 184 states, 184 states have (on average 1.184782608695652) internal successors, (218), 183 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:56,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:20:56,843 INFO L93 Difference]: Finished difference Result 3723 states and 4441 transitions. [2022-11-26 00:20:56,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 677 states. [2022-11-26 00:20:56,843 INFO L78 Accepts]: Start accepts. Automaton has has 184 states, 184 states have (on average 1.184782608695652) internal successors, (218), 183 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2022-11-26 00:20:56,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:20:56,855 INFO L225 Difference]: With dead ends: 3723 [2022-11-26 00:20:56,855 INFO L226 Difference]: Without dead ends: 3605 [2022-11-26 00:20:56,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1425 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 863 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243259 ImplicationChecksByTransitivity, 142.9s TimeCoverageRelationStatistics Valid=218746, Invalid=528614, Unknown=0, NotChecked=0, Total=747360 [2022-11-26 00:20:56,902 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 11829 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 3566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11829 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 5050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3566 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:20:56,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11829 Valid, 1072 Invalid, 5050 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3566 Valid, 1484 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-26 00:20:56,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3605 states. [2022-11-26 00:20:57,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3605 to 894. [2022-11-26 00:20:57,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 1.2161254199328106) internal successors, (1086), 893 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:57,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1086 transitions. [2022-11-26 00:20:57,587 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1086 transitions. Word has length 199 [2022-11-26 00:20:57,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:20:57,588 INFO L495 AbstractCegarLoop]: Abstraction has 894 states and 1086 transitions. [2022-11-26 00:20:57,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 184 states, 184 states have (on average 1.184782608695652) internal successors, (218), 183 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:57,588 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1086 transitions. [2022-11-26 00:20:57,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-11-26 00:20:57,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:20:57,591 INFO L195 NwaCegarLoop]: trace histogram [166, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:20:57,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:20:57,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-26 00:20:57,798 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:20:57,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:20:57,799 INFO L85 PathProgramCache]: Analyzing trace with hash -950521658, now seen corresponding path program 6 times [2022-11-26 00:20:57,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:20:57,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268778407] [2022-11-26 00:20:57,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:20:57,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:20:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:21:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 13948 backedges. 0 proven. 13861 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-26 00:21:19,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:21:19,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268778407] [2022-11-26 00:21:19,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268778407] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:21:19,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411901983] [2022-11-26 00:21:19,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:21:19,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:21:19,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:21:19,541 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:21:19,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690c1093-f156-4bdc-864f-30bb8f7c6430/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:21:20,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:21:20,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:21:20,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-26 00:21:20,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:21:21,302 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:21:21,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 37 [2022-11-26 00:21:21,445 INFO L321 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2022-11-26 00:21:21,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-11-26 00:21:21,591 INFO L321 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2022-11-26 00:21:21,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-11-26 00:21:21,745 INFO L321 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2022-11-26 00:21:21,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-11-26 00:21:21,891 INFO L321 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2022-11-26 00:21:21,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-11-26 00:21:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 13948 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 13912 trivial. 0 not checked. [2022-11-26 00:21:22,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:25:54,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 145 [2022-11-26 00:25:54,741 INFO L321 Elim1Store]: treesize reduction 10, result has 71.4 percent of original size [2022-11-26 00:25:54,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36929 treesize of output 26617