./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_two_index_09.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_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/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_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_two_index_09.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/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_6646663f-bbf5-4923-9f01-4277a7a7b2df/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 c10901f6cd435bfce49587e6dcf9dfedb0e3885a1bcbcf1013c88383e8232647 --- 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 07:01:14,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:01:14,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:01:14,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:01:14,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:01:14,425 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:01:14,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:01:14,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:01:14,430 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:01:14,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:01:14,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:01:14,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:01:14,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:01:14,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:01:14,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:01:14,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:01:14,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:01:14,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:01:14,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:01:14,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:01:14,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:01:14,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:01:14,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:01:14,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:01:14,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:01:14,449 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:01:14,449 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:01:14,450 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:01:14,450 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:01:14,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:01:14,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:01:14,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:01:14,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:01:14,453 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:01:14,454 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:01:14,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:01:14,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:01:14,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:01:14,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:01:14,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:01:14,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:01:14,457 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:01:14,477 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:01:14,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:01:14,478 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:01:14,478 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:01:14,478 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:01:14,479 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:01:14,479 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:01:14,479 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:01:14,479 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:01:14,479 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:01:14,479 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:01:14,480 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:01:14,480 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:01:14,480 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:01:14,480 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:01:14,480 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:01:14,480 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:01:14,481 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:01:14,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:01:14,481 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:01:14,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:01:14,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:01:14,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:01:14,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:01:14,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:01:14,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:01:14,483 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:01:14,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:01:14,483 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:01:14,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:01:14,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:01:14,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:01:14,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:01:14,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:01:14,484 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:01:14,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:01:14,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:01:14,484 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:01:14,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:01:14,485 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:01:14,485 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:01:14,485 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_6646663f-bbf5-4923-9f01-4277a7a7b2df/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c10901f6cd435bfce49587e6dcf9dfedb0e3885a1bcbcf1013c88383e8232647 [2022-12-14 07:01:14,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:01:14,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:01:14,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:01:14,691 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:01:14,691 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:01:14,692 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-examples/standard_two_index_09.i [2022-12-14 07:01:17,256 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:01:17,411 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:01:17,411 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/sv-benchmarks/c/array-examples/standard_two_index_09.i [2022-12-14 07:01:17,417 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/data/4513b640d/5ac988aea0be4fdaaf75cf3e171c5564/FLAGc43e92337 [2022-12-14 07:01:17,428 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/data/4513b640d/5ac988aea0be4fdaaf75cf3e171c5564 [2022-12-14 07:01:17,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:01:17,432 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:01:17,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:01:17,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:01:17,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:01:17,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:01:17" (1/1) ... [2022-12-14 07:01:17,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e30caee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:01:17, skipping insertion in model container [2022-12-14 07:01:17,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:01:17" (1/1) ... [2022-12-14 07:01:17,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:01:17,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:01:17,567 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_6646663f-bbf5-4923-9f01-4277a7a7b2df/sv-benchmarks/c/array-examples/standard_two_index_09.i[814,827] [2022-12-14 07:01:17,579 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:01:17,586 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:01:17,595 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_6646663f-bbf5-4923-9f01-4277a7a7b2df/sv-benchmarks/c/array-examples/standard_two_index_09.i[814,827] [2022-12-14 07:01:17,601 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:01:17,614 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:01:17,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:01:17 WrapperNode [2022-12-14 07:01:17,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:01:17,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:01:17,615 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:01:17,615 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:01:17,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:01:17" (1/1) ... [2022-12-14 07:01:17,626 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:01:17" (1/1) ... [2022-12-14 07:01:17,639 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-12-14 07:01:17,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:01:17,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:01:17,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:01:17,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:01:17,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:01:17" (1/1) ... [2022-12-14 07:01:17,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:01:17" (1/1) ... [2022-12-14 07:01:17,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:01:17" (1/1) ... [2022-12-14 07:01:17,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:01:17" (1/1) ... [2022-12-14 07:01:17,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:01:17" (1/1) ... [2022-12-14 07:01:17,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:01:17" (1/1) ... [2022-12-14 07:01:17,658 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:01:17" (1/1) ... [2022-12-14 07:01:17,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:01:17" (1/1) ... [2022-12-14 07:01:17,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:01:17,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:01:17,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:01:17,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:01:17,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:01:17" (1/1) ... [2022-12-14 07:01:17,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:01:17,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:01:17,687 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:01:17,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:01:17,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:01:17,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:01:17,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 07:01:17,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 07:01:17,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:01:17,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:01:17,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 07:01:17,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:01:17,775 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:01:17,777 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:01:17,876 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:01:17,901 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:01:17,901 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 07:01:17,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:01:17 BoogieIcfgContainer [2022-12-14 07:01:17,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:01:17,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:01:17,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:01:17,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:01:17,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:01:17" (1/3) ... [2022-12-14 07:01:17,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac87e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:01:17, skipping insertion in model container [2022-12-14 07:01:17,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:01:17" (2/3) ... [2022-12-14 07:01:17,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac87e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:01:17, skipping insertion in model container [2022-12-14 07:01:17,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:01:17" (3/3) ... [2022-12-14 07:01:17,911 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_09.i [2022-12-14 07:01:17,930 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:01:17,931 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:01:17,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:01:17,985 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;@6b66493b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:01:17,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 07:01:17,990 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 07:01:17,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:01:17,996 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:01:17,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:01:17,997 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:01:18,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:01:18,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1745982706, now seen corresponding path program 1 times [2022-12-14 07:01:18,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:01:18,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203828261] [2022-12-14 07:01:18,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:01:18,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:01:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:01:18,159 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 07:01:18,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:01:18,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203828261] [2022-12-14 07:01:18,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203828261] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:01:18,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:01:18,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:01:18,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029169402] [2022-12-14 07:01:18,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:01:18,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:01:18,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:01:18,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:01:18,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:01:18,190 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 07:01:18,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:01:18,222 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2022-12-14 07:01:18,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:01:18,225 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 07:01:18,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:01:18,230 INFO L225 Difference]: With dead ends: 17 [2022-12-14 07:01:18,230 INFO L226 Difference]: Without dead ends: 9 [2022-12-14 07:01:18,233 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 07:01:18,237 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 07:01:18,238 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 07:01:18,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-12-14 07:01:18,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-12-14 07:01:18,259 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 07:01:18,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-12-14 07:01:18,260 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2022-12-14 07:01:18,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:01:18,260 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-12-14 07:01:18,260 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 07:01:18,261 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-12-14 07:01:18,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 07:01:18,261 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:01:18,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:01:18,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:01:18,261 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:01:18,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:01:18,262 INFO L85 PathProgramCache]: Analyzing trace with hash 276578033, now seen corresponding path program 1 times [2022-12-14 07:01:18,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:01:18,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422887922] [2022-12-14 07:01:18,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:01:18,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:01:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:01:18,370 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 07:01:18,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:01:18,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422887922] [2022-12-14 07:01:18,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422887922] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:01:18,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313016428] [2022-12-14 07:01:18,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:01:18,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:01:18,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:01:18,373 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:01:18,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:01:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:01:18,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:01:18,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:01:18,445 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 07:01:18,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:01:18,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313016428] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:01:18,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:01:18,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-12-14 07:01:18,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239073355] [2022-12-14 07:01:18,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:01:18,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:01:18,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:01:18,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:01:18,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:01:18,448 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 07:01:18,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:01:18,469 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-12-14 07:01:18,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:01:18,470 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 07:01:18,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:01:18,470 INFO L225 Difference]: With dead ends: 20 [2022-12-14 07:01:18,470 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 07:01:18,470 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 07:01:18,472 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 07:01:18,472 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 07:01:18,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 07:01:18,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2022-12-14 07:01:18,474 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 07:01:18,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-12-14 07:01:18,474 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2022-12-14 07:01:18,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:01:18,475 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-12-14 07:01:18,475 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 07:01:18,475 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-12-14 07:01:18,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 07:01:18,475 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:01:18,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:01:18,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:01:18,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:01:18,677 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:01:18,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:01:18,679 INFO L85 PathProgramCache]: Analyzing trace with hash -51261225, now seen corresponding path program 1 times [2022-12-14 07:01:18,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:01:18,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259115171] [2022-12-14 07:01:18,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:01:18,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:01:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:01:18,855 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 07:01:18,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:01:18,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259115171] [2022-12-14 07:01:18,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259115171] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:01:18,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175926163] [2022-12-14 07:01:18,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:01:18,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:01:18,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:01:18,857 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:01:18,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 07:01:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:01:18,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:01:18,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:01:18,936 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 07:01:18,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:01:18,952 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 07:01:18,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175926163] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:01:18,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1744146454] [2022-12-14 07:01:18,969 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 07:01:18,969 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:01:18,972 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:01:18,975 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:01:18,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:01:19,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:19,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:19,076 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 07:01:19,077 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 07:01:19,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:19,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:19,128 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 07:01:19,129 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 07:01:19,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:19,166 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 07:01:19,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:19,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:01:19,286 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 07:01:19,287 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 07:01:19,403 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 07:01:19,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:19,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-12-14 07:01:19,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:19,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:19,497 INFO L321 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2022-12-14 07:01:19,498 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 07:01:19,566 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 07:01:19,566 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 07:01:19,578 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:01:19,690 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) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 36) |ULTIMATE.start_main_~#b~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |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_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:01:19,690 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:01:19,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:01:19,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 07:01:19,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266082373] [2022-12-14 07:01:19,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:01:19,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:01:19,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:01:19,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:01:19,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-12-14 07:01:19,692 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 07:01:19,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:01:19,721 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-12-14 07:01:19,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:01:19,722 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 07:01:19,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:01:19,722 INFO L225 Difference]: With dead ends: 31 [2022-12-14 07:01:19,722 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 07:01:19,723 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 07:01:19,724 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 07:01:19,724 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 07:01:19,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 07:01:19,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2022-12-14 07:01:19,726 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 07:01:19,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-12-14 07:01:19,727 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-12-14 07:01:19,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:01:19,727 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-12-14 07:01:19,727 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 07:01:19,727 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-12-14 07:01:19,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 07:01:19,727 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:01:19,727 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 07:01:19,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 07:01:19,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:01:19,929 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:01:19,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:01:19,931 INFO L85 PathProgramCache]: Analyzing trace with hash 490227022, now seen corresponding path program 2 times [2022-12-14 07:01:19,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:01:19,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827801973] [2022-12-14 07:01:19,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:01:19,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:01:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:01:20,114 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 07:01:20,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:01:20,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827801973] [2022-12-14 07:01:20,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827801973] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:01:20,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859958103] [2022-12-14 07:01:20,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:01:20,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:01:20,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:01:20,116 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:01:20,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 07:01:20,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 07:01:20,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:01:20,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:01:20,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:01:20,183 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 07:01:20,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:01:20,203 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 07:01:20,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859958103] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:01:20,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [403091170] [2022-12-14 07:01:20,205 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 07:01:20,205 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:01:20,205 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:01:20,205 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:01:20,206 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:01:20,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:20,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:20,242 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 07:01:20,242 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 07:01:20,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:20,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:20,281 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 07:01:20,281 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 07:01:20,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:20,304 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 07:01:20,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:20,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:01:20,373 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 07:01:20,373 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 07:01:20,459 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 07:01:20,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:20,474 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 07:01:20,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:20,538 INFO L321 Elim1Store]: treesize reduction 109, result has 33.5 percent of original size [2022-12-14 07:01:20,538 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 07:01:20,595 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 07:01:20,595 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 07:01:20,606 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:01:20,701 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) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 36) |ULTIMATE.start_main_~#b~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |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_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:01:20,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:01:20,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:01:20,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-14 07:01:20,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155572380] [2022-12-14 07:01:20,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:01:20,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 07:01:20,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:01:20,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 07:01:20,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2022-12-14 07:01:20,703 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 07:01:20,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:01:20,747 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-12-14 07:01:20,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:01:20,748 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 07:01:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:01:20,748 INFO L225 Difference]: With dead ends: 54 [2022-12-14 07:01:20,748 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 07:01:20,749 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 07:01:20,750 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 07:01:20,750 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 07:01:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 07:01:20,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 20. [2022-12-14 07:01:20,755 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 07:01:20,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-12-14 07:01:20,755 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2022-12-14 07:01:20,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:01:20,755 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-12-14 07:01:20,756 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 07:01:20,756 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-12-14 07:01:20,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 07:01:20,756 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:01:20,756 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 07:01:20,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 07:01:20,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:01:20,958 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:01:20,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:01:20,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1077845166, now seen corresponding path program 3 times [2022-12-14 07:01:20,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:01:20,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43375824] [2022-12-14 07:01:20,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:01:20,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:01:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:01:21,219 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 07:01:21,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:01:21,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43375824] [2022-12-14 07:01:21,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43375824] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:01:21,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342346679] [2022-12-14 07:01:21,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:01:21,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:01:21,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:01:21,221 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:01:21,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 07:01:21,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:01:21,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:01:21,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:01:21,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:01:21,318 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 07:01:21,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:01:21,382 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 07:01:21,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342346679] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:01:21,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2119661543] [2022-12-14 07:01:21,385 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 07:01:21,385 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:01:21,385 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:01:21,385 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:01:21,385 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:01:21,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:21,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:21,424 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 07:01:21,425 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 07:01:21,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:21,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:21,436 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 07:01:21,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:21,463 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 07:01:21,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:21,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:21,533 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 07:01:21,533 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 07:01:21,586 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 07:01:21,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:21,610 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 07:01:21,658 INFO L321 Elim1Store]: treesize reduction 119, result has 26.1 percent of original size [2022-12-14 07:01:21,659 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 4 case distinctions, treesize of input 86 treesize of output 108 [2022-12-14 07:01:21,708 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 07:01:21,709 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 07:01:21,720 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:01:21,853 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '556#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 36) |ULTIMATE.start_main_~#b~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |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_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:01:21,853 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:01:21,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:01:21,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2022-12-14 07:01:21,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217147022] [2022-12-14 07:01:21,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:01:21,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 07:01:21,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:01:21,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 07:01:21,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=425, Unknown=0, NotChecked=0, Total=756 [2022-12-14 07:01:21,856 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 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 07:01:21,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:01:21,940 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2022-12-14 07:01:21,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 07:01:21,940 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 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 07:01:21,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:01:21,941 INFO L225 Difference]: With dead ends: 88 [2022-12-14 07:01:21,941 INFO L226 Difference]: Without dead ends: 76 [2022-12-14 07:01:21,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=331, Invalid=425, Unknown=0, NotChecked=0, Total=756 [2022-12-14 07:01:21,943 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 79 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:01:21,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 42 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:01:21,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-12-14 07:01:21,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 36. [2022-12-14 07:01:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:01:21,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-12-14 07:01:21,949 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 18 [2022-12-14 07:01:21,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:01:21,949 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-12-14 07:01:21,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 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 07:01:21,950 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-12-14 07:01:21,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 07:01:21,950 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:01:21,950 INFO L195 NwaCegarLoop]: trace histogram [20, 8, 1, 1, 1, 1, 1, 1] [2022-12-14 07:01:21,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 07:01:22,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:01:22,151 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:01:22,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:01:22,151 INFO L85 PathProgramCache]: Analyzing trace with hash -936889138, now seen corresponding path program 4 times [2022-12-14 07:01:22,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:01:22,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877680888] [2022-12-14 07:01:22,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:01:22,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:01:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:01:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-12-14 07:01:22,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:01:22,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877680888] [2022-12-14 07:01:22,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877680888] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:01:22,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118711309] [2022-12-14 07:01:22,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:01:22,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:01:22,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:01:22,394 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:01:22,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 07:01:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:01:22,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 07:01:22,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:01:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 07:01:22,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:01:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 07:01:22,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118711309] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:01:22,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [809587785] [2022-12-14 07:01:22,881 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 07:01:22,881 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:01:22,881 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:01:22,881 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:01:22,881 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:01:22,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:22,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:22,911 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 07:01:22,911 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 07:01:22,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:22,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:22,943 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 07:01:22,943 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 07:01:22,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:22,960 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 07:01:23,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:23,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:23,012 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 07:01:23,013 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 07:01:23,060 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 07:01:23,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:23,085 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 22 treesize of output 22 [2022-12-14 07:01:23,132 INFO L321 Elim1Store]: treesize reduction 120, result has 23.1 percent of original size [2022-12-14 07:01:23,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 102 [2022-12-14 07:01:23,171 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 07:01:23,171 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 07:01:23,181 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:01:23,323 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1012#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 36) |ULTIMATE.start_main_~#b~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |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_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:01:23,324 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:01:23,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:01:23,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 22, 22] total 51 [2022-12-14 07:01:23,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183003440] [2022-12-14 07:01:23,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:01:23,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 07:01:23,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:01:23,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 07:01:23,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1437, Invalid=1643, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 07:01:23,329 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:01:23,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:01:23,484 INFO L93 Difference]: Finished difference Result 142 states and 177 transitions. [2022-12-14 07:01:23,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-14 07:01:23,484 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-12-14 07:01:23,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:01:23,485 INFO L225 Difference]: With dead ends: 142 [2022-12-14 07:01:23,485 INFO L226 Difference]: Without dead ends: 128 [2022-12-14 07:01:23,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1437, Invalid=1643, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 07:01:23,486 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 199 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:01:23,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 72 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:01:23,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-12-14 07:01:23,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 68. [2022-12-14 07:01:23,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 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 07:01:23,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2022-12-14 07:01:23,491 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 34 [2022-12-14 07:01:23,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:01:23,491 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2022-12-14 07:01:23,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:01:23,492 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2022-12-14 07:01:23,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 07:01:23,492 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:01:23,492 INFO L195 NwaCegarLoop]: trace histogram [48, 12, 1, 1, 1, 1, 1, 1] [2022-12-14 07:01:23,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 07:01:23,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:01:23,694 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:01:23,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:01:23,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1875309298, now seen corresponding path program 5 times [2022-12-14 07:01:23,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:01:23,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525034545] [2022-12-14 07:01:23,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:01:23,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:01:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:01:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2022-12-14 07:01:24,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:01:24,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525034545] [2022-12-14 07:01:24,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525034545] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:01:24,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936862845] [2022-12-14 07:01:24,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:01:24,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:01:24,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:01:24,171 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:01:24,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 07:01:25,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 07:01:25,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:01:25,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:01:25,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:01:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2022-12-14 07:01:25,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:01:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2022-12-14 07:01:25,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936862845] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:01:25,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [24395236] [2022-12-14 07:01:25,289 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 07:01:25,289 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:01:25,289 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:01:25,289 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:01:25,289 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:01:25,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:25,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:25,315 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 07:01:25,316 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 07:01:25,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:25,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:25,323 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 07:01:25,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:25,338 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 07:01:25,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:25,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:25,381 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 07:01:25,381 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 07:01:25,420 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 07:01:25,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:25,437 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 07:01:25,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:25,482 INFO L321 Elim1Store]: treesize reduction 109, result has 33.5 percent of original size [2022-12-14 07:01:25,483 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 07:01:25,524 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 07:01:25,524 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 07:01:25,533 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:01:25,661 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1794#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 36) |ULTIMATE.start_main_~#b~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |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_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:01:25,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:01:25,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:01:25,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2022-12-14 07:01:25,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497149222] [2022-12-14 07:01:25,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:01:25,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 07:01:25,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:01:25,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 07:01:25,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=616, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 07:01:25,663 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 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 07:01:25,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:01:25,823 INFO L93 Difference]: Finished difference Result 213 states and 229 transitions. [2022-12-14 07:01:25,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 07:01:25,824 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 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 66 [2022-12-14 07:01:25,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:01:25,825 INFO L225 Difference]: With dead ends: 213 [2022-12-14 07:01:25,825 INFO L226 Difference]: Without dead ends: 208 [2022-12-14 07:01:25,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=506, Invalid=616, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 07:01:25,825 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 304 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:01:25,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 78 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:01:25,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-12-14 07:01:25,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 82. [2022-12-14 07:01:25,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 0 states have call successors, (0), 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 07:01:25,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2022-12-14 07:01:25,832 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 66 [2022-12-14 07:01:25,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:01:25,832 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2022-12-14 07:01:25,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 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 07:01:25,832 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2022-12-14 07:01:25,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 07:01:25,833 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:01:25,833 INFO L195 NwaCegarLoop]: trace histogram [48, 26, 1, 1, 1, 1, 1, 1] [2022-12-14 07:01:25,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 07:01:26,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:01:26,035 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:01:26,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:01:26,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1291366514, now seen corresponding path program 6 times [2022-12-14 07:01:26,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:01:26,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283250346] [2022-12-14 07:01:26,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:01:26,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:01:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:01:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2022-12-14 07:01:26,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:01:26,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283250346] [2022-12-14 07:01:26,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283250346] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:01:26,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347534913] [2022-12-14 07:01:26,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:01:26,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:01:26,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:01:26,810 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:01:26,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 07:01:26,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:01:26,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:01:26,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 07:01:26,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:01:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-12-14 07:01:27,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:01:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-12-14 07:01:28,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347534913] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:01:28,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [433299157] [2022-12-14 07:01:28,734 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 07:01:28,734 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:01:28,734 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:01:28,734 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:01:28,734 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:01:28,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:28,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:28,762 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 07:01:28,762 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 07:01:28,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:28,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:28,789 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 07:01:28,789 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 07:01:28,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:28,808 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 07:01:28,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:28,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:01:28,863 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 07:01:28,864 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 07:01:28,932 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 07:01:28,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:28,943 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 07:01:28,990 INFO L321 Elim1Store]: treesize reduction 119, result has 26.1 percent of original size [2022-12-14 07:01:28,990 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 07:01:29,024 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 07:01:29,025 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 07:01:29,034 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:01:29,154 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2871#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 36) |ULTIMATE.start_main_~#b~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |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_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:01:29,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:01:29,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:01:29,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 50, 50] total 122 [2022-12-14 07:01:29,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861755262] [2022-12-14 07:01:29,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:01:29,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-12-14 07:01:29,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:01:29,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-12-14 07:01:29,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7756, Invalid=8246, Unknown=0, NotChecked=0, Total=16002 [2022-12-14 07:01:29,167 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 122 states, 122 states have (on average 1.1065573770491803) internal successors, (135), 122 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:01:29,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:01:29,909 INFO L93 Difference]: Finished difference Result 357 states and 438 transitions. [2022-12-14 07:01:29,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-12-14 07:01:29,909 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.1065573770491803) internal successors, (135), 122 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-12-14 07:01:29,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:01:29,910 INFO L225 Difference]: With dead ends: 357 [2022-12-14 07:01:29,910 INFO L226 Difference]: Without dead ends: 325 [2022-12-14 07:01:29,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9039 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=7756, Invalid=8246, Unknown=0, NotChecked=0, Total=16002 [2022-12-14 07:01:29,913 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 683 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:01:29,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 174 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:01:29,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-12-14 07:01:29,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 160. [2022-12-14 07:01:29,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0188679245283019) internal successors, (162), 159 states have internal predecessors, (162), 0 states have call successors, (0), 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 07:01:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2022-12-14 07:01:29,921 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 80 [2022-12-14 07:01:29,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:01:29,922 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2022-12-14 07:01:29,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.1065573770491803) internal successors, (135), 122 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:01:29,922 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2022-12-14 07:01:29,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 07:01:29,923 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:01:29,923 INFO L195 NwaCegarLoop]: trace histogram [119, 33, 1, 1, 1, 1, 1, 1] [2022-12-14 07:01:29,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 07:01:30,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:01:30,125 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:01:30,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:01:30,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1019003145, now seen corresponding path program 7 times [2022-12-14 07:01:30,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:01:30,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265464591] [2022-12-14 07:01:30,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:01:30,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:01:30,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:01:31,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7701 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2022-12-14 07:01:31,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:01:31,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265464591] [2022-12-14 07:01:31,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265464591] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:01:31,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178239639] [2022-12-14 07:01:31,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:01:31,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:01:31,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:01:31,483 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:01:31,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 07:01:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:01:31,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1437 conjuncts, 121 conjunts are in the unsatisfiable core [2022-12-14 07:01:31,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:01:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7701 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-12-14 07:01:32,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:01:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7701 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-12-14 07:01:38,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178239639] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:01:38,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1812753807] [2022-12-14 07:01:38,108 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 07:01:38,108 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:01:38,108 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:01:38,108 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:01:38,108 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:01:38,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:38,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:38,141 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 07:01:38,141 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 07:01:38,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:38,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:38,149 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 07:01:38,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:38,163 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 07:01:38,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:38,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:38,206 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 07:01:38,207 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 07:01:38,244 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 07:01:38,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:01:38,262 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 22 treesize of output 22 [2022-12-14 07:01:38,306 INFO L321 Elim1Store]: treesize reduction 120, result has 23.1 percent of original size [2022-12-14 07:01:38,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 102 [2022-12-14 07:01:38,343 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 07:01:38,344 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 07:01:38,353 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:01:38,544 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4969#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~j~0#1| 36) |ULTIMATE.start_main_~#b~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |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_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:01:38,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:01:38,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:01:38,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 121, 121] total 263 [2022-12-14 07:01:38,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78039046] [2022-12-14 07:01:38,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:01:38,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 263 states [2022-12-14 07:01:38,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:01:38,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 263 interpolants. [2022-12-14 07:01:38,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35251, Invalid=36305, Unknown=0, NotChecked=0, Total=71556 [2022-12-14 07:01:38,556 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 263 states, 263 states have (on average 1.079847908745247) internal successors, (284), 263 states have internal predecessors, (284), 0 states have call successors, (0), 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 07:01:42,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:01:42,850 INFO L93 Difference]: Finished difference Result 595 states and 754 transitions. [2022-12-14 07:01:42,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 263 states. [2022-12-14 07:01:42,851 INFO L78 Accepts]: Start accepts. Automaton has has 263 states, 263 states have (on average 1.079847908745247) internal successors, (284), 263 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2022-12-14 07:01:42,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:01:42,852 INFO L225 Difference]: With dead ends: 595 [2022-12-14 07:01:42,852 INFO L226 Difference]: Without dead ends: 556 [2022-12-14 07:01:42,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44361 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=35251, Invalid=36305, Unknown=0, NotChecked=0, Total=71556 [2022-12-14 07:01:42,856 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 983 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:01:42,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 312 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:01:42,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-12-14 07:01:42,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 316. [2022-12-14 07:01:42,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.0095238095238095) internal successors, (318), 315 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:01:42,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 318 transitions. [2022-12-14 07:01:42,868 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 318 transitions. Word has length 158 [2022-12-14 07:01:42,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:01:42,868 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 318 transitions. [2022-12-14 07:01:42,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 263 states, 263 states have (on average 1.079847908745247) internal successors, (284), 263 states have internal predecessors, (284), 0 states have call successors, (0), 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 07:01:42,868 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 318 transitions. [2022-12-14 07:01:42,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-12-14 07:01:42,872 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:01:42,872 INFO L195 NwaCegarLoop]: trace histogram [260, 48, 1, 1, 1, 1, 1, 1] [2022-12-14 07:01:42,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 07:01:43,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 07:01:43,072 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:01:43,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:01:43,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1473634254, now seen corresponding path program 8 times [2022-12-14 07:01:43,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:01:43,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682850369] [2022-12-14 07:01:43,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:01:43,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:01:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:01:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 35106 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 33930 trivial. 0 not checked. [2022-12-14 07:01:45,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:01:45,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682850369] [2022-12-14 07:01:45,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682850369] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:01:45,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922406553] [2022-12-14 07:01:45,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:01:45,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:01:45,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:01:45,674 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:01:45,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6646663f-bbf5-4923-9f01-4277a7a7b2df/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process