./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_two_index_02.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_two_index_02.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 85e78694133d7e011f7a790be665c543ea082543f17d80457e8ec7e008ca566c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 07:02:44,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:02:44,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:02:44,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:02:44,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:02:44,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:02:44,503 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:02:44,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:02:44,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:02:44,506 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:02:44,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:02:44,508 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:02:44,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:02:44,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:02:44,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:02:44,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:02:44,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:02:44,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:02:44,515 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:02:44,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:02:44,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:02:44,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:02:44,520 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:02:44,521 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:02:44,524 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:02:44,524 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:02:44,524 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:02:44,525 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:02:44,526 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:02:44,527 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:02:44,527 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:02:44,528 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:02:44,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:02:44,529 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:02:44,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:02:44,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:02:44,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:02:44,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:02:44,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:02:44,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:02:44,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:02:44,533 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:02:44,552 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:02:44,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:02:44,552 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:02:44,553 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:02:44,553 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:02:44,553 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:02:44,554 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:02:44,554 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:02:44,554 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:02:44,554 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:02:44,554 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:02:44,554 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:02:44,554 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:02:44,555 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:02:44,555 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:02:44,555 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:02:44,555 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:02:44,555 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:02:44,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:02:44,556 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:02:44,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:02:44,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:02:44,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:02:44,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:02:44,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:02:44,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:02:44,557 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:02:44,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:02:44,557 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:02:44,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:02:44,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:02:44,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:02:44,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:02:44,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:02:44,558 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:02:44,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:02:44,559 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:02:44,559 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:02:44,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:02:44,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:02:44,559 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:02:44,559 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_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85e78694133d7e011f7a790be665c543ea082543f17d80457e8ec7e008ca566c [2022-12-14 07:02:44,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:02:44,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:02:44,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:02:44,756 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:02:44,757 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:02:44,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-examples/standard_two_index_02.i [2022-12-14 07:02:47,278 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:02:47,446 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:02:47,446 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/sv-benchmarks/c/array-examples/standard_two_index_02.i [2022-12-14 07:02:47,451 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/data/ce7b4b92f/f0948def24ee4732ab813d8b57480693/FLAGc5a88061d [2022-12-14 07:02:47,851 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/data/ce7b4b92f/f0948def24ee4732ab813d8b57480693 [2022-12-14 07:02:47,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:02:47,854 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:02:47,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:02:47,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:02:47,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:02:47,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:02:47" (1/1) ... [2022-12-14 07:02:47,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3339fbf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:02:47, skipping insertion in model container [2022-12-14 07:02:47,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:02:47" (1/1) ... [2022-12-14 07:02:47,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:02:47,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:02:47,983 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_4382bdd8-c3e1-4e8d-a191-437528658298/sv-benchmarks/c/array-examples/standard_two_index_02.i[814,827] [2022-12-14 07:02:47,992 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:02:47,998 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:02:48,007 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_4382bdd8-c3e1-4e8d-a191-437528658298/sv-benchmarks/c/array-examples/standard_two_index_02.i[814,827] [2022-12-14 07:02:48,011 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:02:48,020 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:02:48,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:02:48 WrapperNode [2022-12-14 07:02:48,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:02:48,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:02:48,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:02:48,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:02:48,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:02:48" (1/1) ... [2022-12-14 07:02:48,031 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:02:48" (1/1) ... [2022-12-14 07:02:48,042 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-12-14 07:02:48,043 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:02:48,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:02:48,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:02:48,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:02:48,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:02:48" (1/1) ... [2022-12-14 07:02:48,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:02:48" (1/1) ... [2022-12-14 07:02:48,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:02:48" (1/1) ... [2022-12-14 07:02:48,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:02:48" (1/1) ... [2022-12-14 07:02:48,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:02:48" (1/1) ... [2022-12-14 07:02:48,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:02:48" (1/1) ... [2022-12-14 07:02:48,056 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:02:48" (1/1) ... [2022-12-14 07:02:48,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:02:48" (1/1) ... [2022-12-14 07:02:48,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:02:48,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:02:48,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:02:48,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:02:48,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:02:48" (1/1) ... [2022-12-14 07:02:48,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:02:48,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:02:48,080 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:02:48,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:02:48,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:02:48,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:02:48,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 07:02:48,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 07:02:48,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:02:48,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:02:48,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 07:02:48,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:02:48,165 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:02:48,167 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:02:48,251 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:02:48,269 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:02:48,269 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 07:02:48,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:02:48 BoogieIcfgContainer [2022-12-14 07:02:48,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:02:48,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:02:48,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:02:48,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:02:48,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:02:47" (1/3) ... [2022-12-14 07:02:48,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a2f0c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:02:48, skipping insertion in model container [2022-12-14 07:02:48,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:02:48" (2/3) ... [2022-12-14 07:02:48,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a2f0c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:02:48, skipping insertion in model container [2022-12-14 07:02:48,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:02:48" (3/3) ... [2022-12-14 07:02:48,277 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_02.i [2022-12-14 07:02:48,295 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:02:48,296 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:02:48,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:02:48,335 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;@175d2137, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:02:48,335 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 07:02:48,338 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:02:48,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:02:48,342 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:02:48,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:02:48,343 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:02:48,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:02:48,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1745982706, now seen corresponding path program 1 times [2022-12-14 07:02:48,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:02:48,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985014966] [2022-12-14 07:02:48,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:48,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:02:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:02:48,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:02:48,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985014966] [2022-12-14 07:02:48,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985014966] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:02:48,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:02:48,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:02:48,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104460037] [2022-12-14 07:02:48,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:02:48,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:02:48,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:02:48,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:02:48,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:02:48,554 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:02:48,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:02:48,591 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2022-12-14 07:02:48,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:02:48,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 07:02:48,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:02:48,601 INFO L225 Difference]: With dead ends: 17 [2022-12-14 07:02:48,601 INFO L226 Difference]: Without dead ends: 9 [2022-12-14 07:02:48,603 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 [2022-12-14 07:02:48,606 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:02:48,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:02:48,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-12-14 07:02:48,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-12-14 07:02:48,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:02:48,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-12-14 07:02:48,636 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2022-12-14 07:02:48,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:02:48,636 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-12-14 07:02:48,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:02:48,637 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-12-14 07:02:48,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 07:02:48,637 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:02:48,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:02:48,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:02:48,637 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:02:48,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:02:48,638 INFO L85 PathProgramCache]: Analyzing trace with hash 276578033, now seen corresponding path program 1 times [2022-12-14 07:02:48,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:02:48,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419854801] [2022-12-14 07:02:48,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:48,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:02:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:02:48,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:02:48,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419854801] [2022-12-14 07:02:48,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419854801] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:02:48,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767236208] [2022-12-14 07:02:48,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:48,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:02:48,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:02:48,712 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:02:48,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:02:48,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:48,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:02:48,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:02:48,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:02:48,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:02:48,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767236208] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:02:48,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:02:48,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-12-14 07:02:48,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129680134] [2022-12-14 07:02:48,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:02:48,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:02:48,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:02:48,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:02:48,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:02:48,788 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:02:48,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:02:48,807 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-12-14 07:02:48,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:02:48,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 07:02:48,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:02:48,808 INFO L225 Difference]: With dead ends: 20 [2022-12-14 07:02:48,808 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 07:02:48,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:02:48,810 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:02:48,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:02:48,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 07:02:48,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2022-12-14 07:02:48,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:02:48,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-12-14 07:02:48,814 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2022-12-14 07:02:48,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:02:48,814 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-12-14 07:02:48,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:02:48,814 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-12-14 07:02:48,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 07:02:48,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:02:48,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:02:48,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:02:49,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:02:49,017 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:02:49,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:02:49,019 INFO L85 PathProgramCache]: Analyzing trace with hash -51261225, now seen corresponding path program 1 times [2022-12-14 07:02:49,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:02:49,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854130839] [2022-12-14 07:02:49,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:49,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:02:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:49,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:02:49,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:02:49,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854130839] [2022-12-14 07:02:49,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854130839] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:02:49,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611401760] [2022-12-14 07:02:49,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:49,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:02:49,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:02:49,169 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:02:49,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 07:02:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:49,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:02:49,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:02:49,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:02:49,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:02:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:02:49,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611401760] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:02:49,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2068534194] [2022-12-14 07:02:49,273 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 07:02:49,273 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:02:49,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:02:49,280 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:02:49,280 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:02:49,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:49,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:49,363 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 07:02:49,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 07:02:49,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:49,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:49,416 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 07:02:49,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 07:02:49,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:49,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 07:02:49,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:49,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:49,581 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 07:02:49,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-12-14 07:02:49,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:02:49,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:49,718 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 17 treesize of output 17 [2022-12-14 07:02:49,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:49,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:49,783 INFO L321 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2022-12-14 07:02:49,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 103 [2022-12-14 07:02:49,929 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 07:02:49,929 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 25 treesize of output 25 [2022-12-14 07:02:49,943 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:02:50,048 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '164#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 8) |ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:02:50,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:02:50,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:02:50,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 07:02:50,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012890876] [2022-12-14 07:02:50,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:02:50,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:02:50,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:02:50,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:02:50,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-12-14 07:02:50,050 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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) [2022-12-14 07:02:50,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:02:50,075 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-12-14 07:02:50,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:02:50,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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 8 [2022-12-14 07:02:50,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:02:50,076 INFO L225 Difference]: With dead ends: 31 [2022-12-14 07:02:50,076 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 07:02:50,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-12-14 07:02:50,077 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:02:50,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:02:50,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 07:02:50,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2022-12-14 07:02:50,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:02:50,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-12-14 07:02:50,080 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-12-14 07:02:50,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:02:50,080 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-12-14 07:02:50,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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) [2022-12-14 07:02:50,080 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-12-14 07:02:50,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 07:02:50,080 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:02:50,080 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 07:02:50,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 07:02:50,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:02:50,282 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:02:50,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:02:50,284 INFO L85 PathProgramCache]: Analyzing trace with hash 490227022, now seen corresponding path program 2 times [2022-12-14 07:02:50,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:02:50,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793241281] [2022-12-14 07:02:50,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:50,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:02:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 07:02:50,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:02:50,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793241281] [2022-12-14 07:02:50,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793241281] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:02:50,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798067102] [2022-12-14 07:02:50,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:02:50,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:02:50,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:02:50,467 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:02:50,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 07:02:50,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 07:02:50,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:02:50,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:02:50,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:02:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 07:02:50,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:02:50,546 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 07:02:50,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798067102] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:02:50,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1497740028] [2022-12-14 07:02:50,547 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 07:02:50,548 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:02:50,548 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:02:50,548 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:02:50,548 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:02:50,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:50,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:50,585 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 07:02:50,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 07:02:50,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:50,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:50,624 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 07:02:50,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 07:02:50,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:50,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 07:02:50,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:50,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:02:50,731 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 07:02:50,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-12-14 07:02:50,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:02:50,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:50,822 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 20 treesize of output 20 [2022-12-14 07:02:50,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:50,882 INFO L321 Elim1Store]: treesize reduction 109, result has 33.5 percent of original size [2022-12-14 07:02:50,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 109 [2022-12-14 07:02:50,940 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 07:02:50,941 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 25 treesize of output 25 [2022-12-14 07:02:50,958 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:02:51,051 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '312#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 8) |ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:02:51,051 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:02:51,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:02:51,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-14 07:02:51,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045140350] [2022-12-14 07:02:51,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:02:51,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 07:02:51,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:02:51,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 07:02:51,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2022-12-14 07:02:51,053 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2022-12-14 07:02:51,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:02:51,098 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-12-14 07:02:51,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:02:51,099 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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 12 [2022-12-14 07:02:51,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:02:51,099 INFO L225 Difference]: With dead ends: 54 [2022-12-14 07:02:51,100 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 07:02:51,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2022-12-14 07:02:51,101 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:02:51,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 18 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:02:51,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 07:02:51,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 20. [2022-12-14 07:02:51,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:02:51,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-12-14 07:02:51,106 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2022-12-14 07:02:51,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:02:51,106 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-12-14 07:02:51,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2022-12-14 07:02:51,106 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-12-14 07:02:51,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 07:02:51,107 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:02:51,107 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 07:02:51,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 07:02:51,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:02:51,309 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:02:51,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:02:51,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1077845166, now seen corresponding path program 3 times [2022-12-14 07:02:51,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:02:51,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362511056] [2022-12-14 07:02:51,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:51,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:02:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 07:02:51,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:02:51,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362511056] [2022-12-14 07:02:51,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362511056] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:02:51,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523201541] [2022-12-14 07:02:51,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:02:51,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:02:51,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:02:51,541 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:02:51,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 07:02:51,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:02:51,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:02:51,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:02:51,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:02:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 07:02:51,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:02:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 07:02:51,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523201541] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:02:51,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [406032231] [2022-12-14 07:02:51,691 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 07:02:51,691 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:02:51,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:02:51,692 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:02:51,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:02:51,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:51,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:51,732 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 07:02:51,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 07:02:51,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:51,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:51,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 07:02:51,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:51,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 07:02:51,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:51,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:51,816 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 07:02:51,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 258 treesize of output 246 [2022-12-14 07:02:51,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:02:51,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:51,892 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 25 treesize of output 25 [2022-12-14 07:02:51,942 INFO L321 Elim1Store]: treesize reduction 118, result has 26.3 percent of original size [2022-12-14 07:02:51,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 108 [2022-12-14 07:02:51,985 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 07:02:51,986 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 25 treesize of output 25 [2022-12-14 07:02:51,997 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:02:52,135 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '554#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 8) |ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:02:52,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:02:52,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:02:52,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2022-12-14 07:02:52,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981627090] [2022-12-14 07:02:52,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:02:52,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 07:02:52,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:02:52,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 07:02:52,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=368, Unknown=0, NotChecked=0, Total=650 [2022-12-14 07:02:52,136 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:02:52,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:02:52,223 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2022-12-14 07:02:52,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 07:02:52,223 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 07:02:52,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:02:52,224 INFO L225 Difference]: With dead ends: 100 [2022-12-14 07:02:52,224 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 07:02:52,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=368, Unknown=0, NotChecked=0, Total=650 [2022-12-14 07:02:52,225 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 104 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:02:52,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 48 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:02:52,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 07:02:52,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 37. [2022-12-14 07:02:52,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:02:52,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-12-14 07:02:52,229 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 18 [2022-12-14 07:02:52,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:02:52,229 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-12-14 07:02:52,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:02:52,230 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-12-14 07:02:52,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 07:02:52,230 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:02:52,230 INFO L195 NwaCegarLoop]: trace histogram [18, 11, 1, 1, 1, 1, 1, 1] [2022-12-14 07:02:52,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 07:02:52,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:02:52,431 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:02:52,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:02:52,432 INFO L85 PathProgramCache]: Analyzing trace with hash 878194042, now seen corresponding path program 4 times [2022-12-14 07:02:52,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:02:52,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631315596] [2022-12-14 07:02:52,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:52,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:02:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:52,747 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-12-14 07:02:52,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:02:52,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631315596] [2022-12-14 07:02:52,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631315596] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:02:52,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131720829] [2022-12-14 07:02:52,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:02:52,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:02:52,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:02:52,748 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:02:52,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 07:02:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:52,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:02:52,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:02:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 07:02:52,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:02:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 07:02:53,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131720829] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:02:53,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [839085551] [2022-12-14 07:02:53,243 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 07:02:53,243 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:02:53,243 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:02:53,243 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:02:53,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:02:53,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:53,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:53,272 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 07:02:53,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 07:02:53,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:53,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:53,303 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 07:02:53,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 07:02:53,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:53,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 07:02:53,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:53,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:53,369 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 07:02:53,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 258 treesize of output 246 [2022-12-14 07:02:53,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:02:53,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:53,434 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 20 treesize of output 20 [2022-12-14 07:02:53,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:02:53,481 INFO L321 Elim1Store]: treesize reduction 109, result has 33.5 percent of original size [2022-12-14 07:02:53,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 109 [2022-12-14 07:02:53,523 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 07:02:53,524 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 25 treesize of output 25 [2022-12-14 07:02:53,534 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:02:53,661 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1027#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 8) |ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:02:53,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:02:53,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:02:53,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 20] total 44 [2022-12-14 07:02:53,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010937192] [2022-12-14 07:02:53,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:02:53,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 07:02:53,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:02:53,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 07:02:53,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1087, Invalid=1265, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 07:02:53,665 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 44 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:02:53,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:02:53,850 INFO L93 Difference]: Finished difference Result 194 states and 231 transitions. [2022-12-14 07:02:53,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-14 07:02:53,850 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 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 35 [2022-12-14 07:02:53,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:02:53,852 INFO L225 Difference]: With dead ends: 194 [2022-12-14 07:02:53,852 INFO L226 Difference]: Without dead ends: 177 [2022-12-14 07:02:53,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1087, Invalid=1265, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 07:02:53,855 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 292 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:02:53,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 99 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:02:53,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-12-14 07:02:53,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 71. [2022-12-14 07:02:53,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:02:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2022-12-14 07:02:53,865 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 35 [2022-12-14 07:02:53,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:02:53,865 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2022-12-14 07:02:53,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:02:53,865 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2022-12-14 07:02:53,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 07:02:53,866 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:02:53,866 INFO L195 NwaCegarLoop]: trace histogram [41, 22, 1, 1, 1, 1, 1, 1] [2022-12-14 07:02:53,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 07:02:54,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 07:02:54,068 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:02:54,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:02:54,069 INFO L85 PathProgramCache]: Analyzing trace with hash -938265679, now seen corresponding path program 5 times [2022-12-14 07:02:54,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:02:54,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357752968] [2022-12-14 07:02:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:02:54,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:02:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:02:54,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-12-14 07:02:54,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:02:54,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357752968] [2022-12-14 07:02:54,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357752968] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:02:54,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221606710] [2022-12-14 07:02:54,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:02:54,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:02:54,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:02:54,738 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:02:54,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 07:03:12,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-14 07:03:12,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:03:12,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 07:03:12,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:03:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-12-14 07:03:12,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:03:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-12-14 07:03:12,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221606710] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:03:12,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [870330487] [2022-12-14 07:03:12,568 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 07:03:12,569 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:03:12,569 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:03:12,569 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:03:12,569 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:03:12,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:12,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:12,598 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 07:03:12,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 07:03:12,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:12,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:12,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 07:03:12,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:12,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 07:03:12,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:12,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:03:12,670 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 07:03:12,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-12-14 07:03:12,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:03:12,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:12,738 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 17 treesize of output 17 [2022-12-14 07:03:12,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:12,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:12,788 INFO L321 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2022-12-14 07:03:12,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 103 [2022-12-14 07:03:12,828 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 07:03:12,828 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 25 treesize of output 25 [2022-12-14 07:03:12,835 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:03:12,915 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1921#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 8) |ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:03:12,915 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:03:12,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:03:12,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-12-14 07:03:12,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098815168] [2022-12-14 07:03:12,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:03:12,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 07:03:12,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:03:12,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 07:03:12,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1336, Invalid=1526, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 07:03:12,917 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:03:13,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:03:13,221 INFO L93 Difference]: Finished difference Result 354 states and 386 transitions. [2022-12-14 07:03:13,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 07:03:13,222 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-12-14 07:03:13,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:03:13,223 INFO L225 Difference]: With dead ends: 354 [2022-12-14 07:03:13,223 INFO L226 Difference]: Without dead ends: 326 [2022-12-14 07:03:13,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1336, Invalid=1526, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 07:03:13,225 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 600 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:03:13,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 138 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:03:13,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-12-14 07:03:13,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 100. [2022-12-14 07:03:13,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:03:13,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-12-14 07:03:13,233 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 69 [2022-12-14 07:03:13,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:03:13,233 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-12-14 07:03:13,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:03:13,233 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-12-14 07:03:13,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 07:03:13,236 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:03:13,236 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2022-12-14 07:03:13,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 07:03:13,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:03:13,438 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:03:13,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:03:13,439 INFO L85 PathProgramCache]: Analyzing trace with hash 788832814, now seen corresponding path program 6 times [2022-12-14 07:03:13,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:03:13,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752017551] [2022-12-14 07:03:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:03:13,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:03:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-12-14 07:03:14,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:03:14,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752017551] [2022-12-14 07:03:14,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752017551] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:03:14,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603713205] [2022-12-14 07:03:14,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:03:14,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:03:14,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:03:14,931 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:03:14,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 07:03:15,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:03:15,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:03:15,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 07:03:15,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:03:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-12-14 07:03:15,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:03:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-12-14 07:03:17,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603713205] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:03:17,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [500188379] [2022-12-14 07:03:17,415 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 07:03:17,415 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:03:17,415 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:03:17,415 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:03:17,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:03:17,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:17,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:17,448 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 07:03:17,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 07:03:17,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:17,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:17,488 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 07:03:17,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 07:03:17,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:17,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 07:03:17,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:17,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:17,557 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 07:03:17,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 258 treesize of output 246 [2022-12-14 07:03:17,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:03:17,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:17,618 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 17 treesize of output 17 [2022-12-14 07:03:17,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:17,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:17,659 INFO L321 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2022-12-14 07:03:17,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 103 [2022-12-14 07:03:17,692 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 07:03:17,692 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 25 treesize of output 25 [2022-12-14 07:03:17,700 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:03:17,876 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3343#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 8) |ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:03:17,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:03:17,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:03:17,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 121 [2022-12-14 07:03:17,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34825675] [2022-12-14 07:03:17,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:03:17,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-12-14 07:03:17,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:03:17,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-12-14 07:03:17,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7632, Invalid=8118, Unknown=0, NotChecked=0, Total=15750 [2022-12-14 07:03:17,881 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 121 states, 121 states have (on average 1.2479338842975207) internal successors, (151), 121 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:03:19,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:03:19,636 INFO L93 Difference]: Finished difference Result 600 states and 700 transitions. [2022-12-14 07:03:19,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-12-14 07:03:19,637 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.2479338842975207) internal successors, (151), 121 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-12-14 07:03:19,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:03:19,638 INFO L225 Difference]: With dead ends: 600 [2022-12-14 07:03:19,638 INFO L226 Difference]: Without dead ends: 548 [2022-12-14 07:03:19,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5769 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7632, Invalid=8118, Unknown=0, NotChecked=0, Total=15750 [2022-12-14 07:03:19,641 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1284 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 510 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1284 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 510 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:03:19,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1284 Valid, 285 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [510 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:03:19,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-12-14 07:03:19,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 197. [2022-12-14 07:03:19,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.0153061224489797) internal successors, (199), 196 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:03:19,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2022-12-14 07:03:19,651 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 98 [2022-12-14 07:03:19,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:03:19,652 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2022-12-14 07:03:19,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.2479338842975207) internal successors, (151), 121 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:03:19,652 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2022-12-14 07:03:19,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-12-14 07:03:19,654 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:03:19,654 INFO L195 NwaCegarLoop]: trace histogram [118, 71, 1, 1, 1, 1, 1, 1] [2022-12-14 07:03:19,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 07:03:19,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:03:19,855 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:03:19,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:03:19,856 INFO L85 PathProgramCache]: Analyzing trace with hash 441992634, now seen corresponding path program 7 times [2022-12-14 07:03:19,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:03:19,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052371793] [2022-12-14 07:03:19,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:03:19,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:03:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9577 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 7021 trivial. 0 not checked. [2022-12-14 07:03:23,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:03:23,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052371793] [2022-12-14 07:03:23,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052371793] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:03:23,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059476544] [2022-12-14 07:03:23,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:03:23,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:03:23,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:03:23,214 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:03:23,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 07:03:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:23,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 1770 conjuncts, 120 conjunts are in the unsatisfiable core [2022-12-14 07:03:23,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:03:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9577 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2022-12-14 07:03:24,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:03:32,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9577 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2022-12-14 07:03:32,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059476544] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:03:32,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [554189736] [2022-12-14 07:03:32,844 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 07:03:32,844 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:03:32,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:03:32,845 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:03:32,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:03:32,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:32,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:32,881 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 07:03:32,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 07:03:32,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:32,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:32,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 07:03:32,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:32,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 07:03:32,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:32,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:03:32,975 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 07:03:32,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-12-14 07:03:33,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 07:03:33,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:03:33,053 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 25 treesize of output 25 [2022-12-14 07:03:33,094 INFO L321 Elim1Store]: treesize reduction 123, result has 23.1 percent of original size [2022-12-14 07:03:33,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 103 [2022-12-14 07:03:33,131 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 07:03:33,131 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 25 treesize of output 25 [2022-12-14 07:03:33,139 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:03:33,283 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6066#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 8) |ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:03:33,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:03:33,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:03:33,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 120, 120] total 254 [2022-12-14 07:03:33,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942417488] [2022-12-14 07:03:33,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:03:33,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 254 states [2022-12-14 07:03:33,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:03:33,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 254 interpolants. [2022-12-14 07:03:33,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32902, Invalid=33920, Unknown=0, NotChecked=0, Total=66822 [2022-12-14 07:03:33,306 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand has 254 states, 254 states have (on average 1.2598425196850394) internal successors, (320), 254 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:03:48,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:03:48,106 INFO L93 Difference]: Finished difference Result 1124 states and 1321 transitions. [2022-12-14 07:03:48,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 254 states. [2022-12-14 07:03:48,107 INFO L78 Accepts]: Start accepts. Automaton has has 254 states, 254 states have (on average 1.2598425196850394) internal successors, (320), 254 states have internal predecessors, (320), 0 states have call successors, (0), 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 195 [2022-12-14 07:03:48,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:03:48,110 INFO L225 Difference]: With dead ends: 1124 [2022-12-14 07:03:48,110 INFO L226 Difference]: Without dead ends: 1047 [2022-12-14 07:03:48,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25651 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=32902, Invalid=33920, Unknown=0, NotChecked=0, Total=66822 [2022-12-14 07:03:48,116 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2832 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 1032 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2832 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 1866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1032 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:03:48,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2832 Valid, 573 Invalid, 1866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1032 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 07:03:48,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2022-12-14 07:03:48,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 391. [2022-12-14 07:03:48,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.0076923076923077) internal successors, (393), 390 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:03:48,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 393 transitions. [2022-12-14 07:03:48,139 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 393 transitions. Word has length 195 [2022-12-14 07:03:48,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:03:48,139 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 393 transitions. [2022-12-14 07:03:48,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 254 states, 254 states have (on average 1.2598425196850394) internal successors, (320), 254 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:03:48,140 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 393 transitions. [2022-12-14 07:03:48,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-12-14 07:03:48,148 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:03:48,148 INFO L195 NwaCegarLoop]: trace histogram [251, 132, 1, 1, 1, 1, 1, 1] [2022-12-14 07:03:48,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 07:03:48,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:03:48,349 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:03:48,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:03:48,351 INFO L85 PathProgramCache]: Analyzing trace with hash 564943249, now seen corresponding path program 8 times [2022-12-14 07:03:48,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:03:48,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780508735] [2022-12-14 07:03:48,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:03:48,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:03:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 40404 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 31626 trivial. 0 not checked. [2022-12-14 07:03:58,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:03:58,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780508735] [2022-12-14 07:03:58,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780508735] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:03:58,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482101876] [2022-12-14 07:03:58,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:03:58,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:03:58,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:03:58,519 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:03:58,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4382bdd8-c3e1-4e8d-a191-437528658298/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process