./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba --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 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c --- 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-b5237d8 [2022-11-22 02:39:13,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:39:13,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:39:13,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:39:13,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:39:13,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:39:13,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:39:13,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:39:13,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:39:13,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:39:13,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:39:13,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:39:13,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:39:13,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:39:13,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:39:13,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:39:13,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:39:13,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:39:13,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:39:13,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:39:13,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:39:13,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:39:13,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:39:13,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:39:13,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:39:13,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:39:13,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:39:13,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:39:13,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:39:13,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:39:13,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:39:13,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:39:13,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:39:13,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:39:13,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:39:13,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:39:13,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:39:13,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:39:13,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:39:13,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:39:13,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:39:13,562 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:39:13,598 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:39:13,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:39:13,599 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:39:13,599 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:39:13,603 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:39:13,604 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:39:13,604 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:39:13,604 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:39:13,604 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:39:13,604 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:39:13,605 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:39:13,606 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:39:13,606 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:39:13,606 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:39:13,606 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:39:13,606 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:39:13,607 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:39:13,607 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:39:13,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:39:13,608 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:39:13,608 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:39:13,608 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:39:13,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:39:13,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:39:13,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:39:13,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:39:13,610 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:39:13,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:39:13,610 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:39:13,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:39:13,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:39:13,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:39:13,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:39:13,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:39:13,612 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:39:13,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:39:13,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:39:13,612 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:39:13,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:39:13,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:39:13,613 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:39:13,613 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_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c [2022-11-22 02:39:13,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:39:13,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:39:13,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:39:13,959 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:39:13,959 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:39:13,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2022-11-22 02:39:17,168 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:39:17,449 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:39:17,450 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2022-11-22 02:39:17,457 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/data/9286808d5/6eb6f5ad3ad1413eb6314162e19db19f/FLAG808a6d7bd [2022-11-22 02:39:17,479 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/data/9286808d5/6eb6f5ad3ad1413eb6314162e19db19f [2022-11-22 02:39:17,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:39:17,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:39:17,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:39:17,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:39:17,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:39:17,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:39:17" (1/1) ... [2022-11-22 02:39:17,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15db15d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:17, skipping insertion in model container [2022-11-22 02:39:17,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:39:17" (1/1) ... [2022-11-22 02:39:17,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:39:17,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:39:17,696 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_1f139dc9-a5e0-48f8-b54b-49b26d841294/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2022-11-22 02:39:17,715 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:39:17,725 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:39:17,736 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_1f139dc9-a5e0-48f8-b54b-49b26d841294/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2022-11-22 02:39:17,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:39:17,760 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:39:17,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:17 WrapperNode [2022-11-22 02:39:17,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:39:17,761 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:39:17,761 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:39:17,762 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:39:17,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:17" (1/1) ... [2022-11-22 02:39:17,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:17" (1/1) ... [2022-11-22 02:39:17,801 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-11-22 02:39:17,802 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:39:17,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:39:17,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:39:17,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:39:17,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:17" (1/1) ... [2022-11-22 02:39:17,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:17" (1/1) ... [2022-11-22 02:39:17,817 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:17" (1/1) ... [2022-11-22 02:39:17,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:17" (1/1) ... [2022-11-22 02:39:17,824 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:17" (1/1) ... [2022-11-22 02:39:17,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:17" (1/1) ... [2022-11-22 02:39:17,831 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:17" (1/1) ... [2022-11-22 02:39:17,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:17" (1/1) ... [2022-11-22 02:39:17,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:39:17,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:39:17,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:39:17,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:39:17,837 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:17" (1/1) ... [2022-11-22 02:39:17,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:39:17,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:39:17,877 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:39:17,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:39:17,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:39:17,922 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 02:39:17,922 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 02:39:17,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:39:17,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 02:39:17,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 02:39:17,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:39:17,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:39:17,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 02:39:17,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:39:18,013 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:39:18,015 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:39:18,213 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:39:18,268 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:39:18,268 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-22 02:39:18,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:39:18 BoogieIcfgContainer [2022-11-22 02:39:18,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:39:18,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:39:18,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:39:18,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:39:18,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:39:17" (1/3) ... [2022-11-22 02:39:18,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2365a071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:39:18, skipping insertion in model container [2022-11-22 02:39:18,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:17" (2/3) ... [2022-11-22 02:39:18,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2365a071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:39:18, skipping insertion in model container [2022-11-22 02:39:18,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:39:18" (3/3) ... [2022-11-22 02:39:18,281 INFO L112 eAbstractionObserver]: Analyzing ICFG array_min_and_copy_shift_sum_add.c [2022-11-22 02:39:18,302 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:39:18,302 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:39:18,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:39:18,361 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;@51abed0e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:39:18,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:39:18,368 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:39:18,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 02:39:18,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:18,379 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:39:18,380 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:39:18,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:18,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1232094444, now seen corresponding path program 1 times [2022-11-22 02:39:18,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:39:18,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132007946] [2022-11-22 02:39:18,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:39:18,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:39:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:39:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:39:18,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:39:18,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132007946] [2022-11-22 02:39:18,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132007946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:39:18,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:39:18,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:39:18,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507701498] [2022-11-22 02:39:18,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:39:18,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:39:18,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:39:18,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:39:18,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:39:18,938 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:39:19,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:39:19,037 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-11-22 02:39:19,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:39:19,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2022-11-22 02:39:19,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:39:19,049 INFO L225 Difference]: With dead ends: 25 [2022-11-22 02:39:19,049 INFO L226 Difference]: Without dead ends: 16 [2022-11-22 02:39:19,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:39:19,057 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:39:19,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:39:19,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-22 02:39:19,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-22 02:39:19,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:39:19,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-22 02:39:19,105 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 14 [2022-11-22 02:39:19,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:39:19,107 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-22 02:39:19,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 02:39:19,108 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-22 02:39:19,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 02:39:19,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:19,110 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:39:19,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:39:19,110 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:39:19,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:19,112 INFO L85 PathProgramCache]: Analyzing trace with hash -460272811, now seen corresponding path program 1 times [2022-11-22 02:39:19,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:39:19,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225863481] [2022-11-22 02:39:19,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:39:19,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:39:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:39:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:39:19,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:39:19,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225863481] [2022-11-22 02:39:19,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225863481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:39:19,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:39:19,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:39:19,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142918694] [2022-11-22 02:39:19,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:39:19,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:39:19,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:39:19,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:39:19,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:39:19,342 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:39:19,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:39:19,432 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2022-11-22 02:39:19,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:39:19,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2022-11-22 02:39:19,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:39:19,434 INFO L225 Difference]: With dead ends: 28 [2022-11-22 02:39:19,435 INFO L226 Difference]: Without dead ends: 20 [2022-11-22 02:39:19,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:39:19,437 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:39:19,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:39:19,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-22 02:39:19,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-11-22 02:39:19,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:39:19,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-11-22 02:39:19,453 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2022-11-22 02:39:19,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:39:19,454 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-11-22 02:39:19,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:39:19,456 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-11-22 02:39:19,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-22 02:39:19,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:19,459 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:39:19,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:39:19,460 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:39:19,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:19,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1912132504, now seen corresponding path program 1 times [2022-11-22 02:39:19,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:39:19,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074466881] [2022-11-22 02:39:19,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:39:19,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:39:19,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:39:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:39:20,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:39:20,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074466881] [2022-11-22 02:39:20,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074466881] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:39:20,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957702449] [2022-11-22 02:39:20,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:39:20,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:39:20,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:39:20,513 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:39:20,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:39:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:39:20,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 02:39:20,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:39:20,858 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 11 treesize of output 7 [2022-11-22 02:39:20,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:39:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:39:20,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:39:23,137 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:39:23,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-22 02:39:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:39:23,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957702449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:39:23,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1719941667] [2022-11-22 02:39:23,263 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 02:39:23,264 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:39:23,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:39:23,275 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:39:23,276 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:39:23,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:23,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:23,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:23,615 INFO L321 Elim1Store]: treesize reduction 80, result has 33.3 percent of original size [2022-11-22 02:39:23,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 63 [2022-11-22 02:39:23,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:23,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:23,776 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 02:39:23,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 02:39:26,247 INFO L321 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-11-22 02:39:26,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 266 treesize of output 312 [2022-11-22 02:39:27,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:39:27,055 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-22 02:39:27,055 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 29 treesize of output 31 [2022-11-22 02:39:27,213 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 02:39:27,215 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:39:28,698 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '304#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:39:28,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:39:28,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:39:28,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-11-22 02:39:28,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171360475] [2022-11-22 02:39:28,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:39:28,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 02:39:28,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:39:28,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 02:39:28,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=965, Unknown=1, NotChecked=0, Total=1122 [2022-11-22 02:39:28,703 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 02:39:28,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:39:28,978 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-11-22 02:39:28,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 02:39:28,979 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 21 [2022-11-22 02:39:28,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:39:28,979 INFO L225 Difference]: With dead ends: 26 [2022-11-22 02:39:28,980 INFO L226 Difference]: Without dead ends: 23 [2022-11-22 02:39:28,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=171, Invalid=1088, Unknown=1, NotChecked=0, Total=1260 [2022-11-22 02:39:28,981 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:39:28,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 94 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:39:28,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-22 02:39:28,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-11-22 02:39:28,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:39:28,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-11-22 02:39:28,987 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 21 [2022-11-22 02:39:28,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:39:28,991 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-11-22 02:39:28,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 02:39:28,992 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-11-22 02:39:28,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 02:39:28,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:28,995 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:39:29,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:39:29,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:39:29,201 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:39:29,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:29,202 INFO L85 PathProgramCache]: Analyzing trace with hash -853929431, now seen corresponding path program 2 times [2022-11-22 02:39:29,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:39:29,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463985394] [2022-11-22 02:39:29,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:39:29,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:39:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:39:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 02:39:29,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:39:29,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463985394] [2022-11-22 02:39:29,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463985394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:39:29,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946957724] [2022-11-22 02:39:29,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:39:29,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:39:29,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:39:29,320 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:39:29,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:39:29,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 02:39:29,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:39:29,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:39:29,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:39:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 02:39:29,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:39:29,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 02:39:29,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946957724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:39:29,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [873338701] [2022-11-22 02:39:29,552 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 02:39:29,552 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:39:29,553 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:39:29,553 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:39:29,553 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:39:29,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:29,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:29,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:29,754 INFO L321 Elim1Store]: treesize reduction 80, result has 33.3 percent of original size [2022-11-22 02:39:29,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 63 [2022-11-22 02:39:29,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:29,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:29,886 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 02:39:29,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 02:39:31,730 INFO L321 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-11-22 02:39:31,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 266 treesize of output 312 [2022-11-22 02:39:32,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:39:32,168 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-22 02:39:32,168 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 29 treesize of output 31 [2022-11-22 02:39:32,304 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 02:39:32,305 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:39:33,505 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '530#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:39:33,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:39:33,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:39:33,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-22 02:39:33,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979091578] [2022-11-22 02:39:33,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:39:33,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 02:39:33,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:39:33,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 02:39:33,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:39:33,510 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-22 02:39:33,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:39:33,650 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-11-22 02:39:33,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:39:33,652 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 22 [2022-11-22 02:39:33,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:39:33,653 INFO L225 Difference]: With dead ends: 38 [2022-11-22 02:39:33,654 INFO L226 Difference]: Without dead ends: 28 [2022-11-22 02:39:33,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-11-22 02:39:33,656 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:39:33,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 58 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:39:33,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-22 02:39:33,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2022-11-22 02:39:33,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:39:33,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-11-22 02:39:33,663 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 22 [2022-11-22 02:39:33,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:39:33,664 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-11-22 02:39:33,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-22 02:39:33,664 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-11-22 02:39:33,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 02:39:33,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:33,665 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:39:33,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:39:33,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:39:33,872 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:39:33,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:33,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1239390197, now seen corresponding path program 3 times [2022-11-22 02:39:33,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:39:33,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477277818] [2022-11-22 02:39:33,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:39:33,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:39:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:39:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:39:34,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:39:34,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477277818] [2022-11-22 02:39:34,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477277818] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:39:34,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840912573] [2022-11-22 02:39:34,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:39:34,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:39:34,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:39:34,004 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:39:34,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:39:34,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:39:34,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:39:34,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:39:34,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:39:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 02:39:34,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:39:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 02:39:34,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840912573] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:39:34,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2018319525] [2022-11-22 02:39:34,209 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 02:39:34,210 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:39:34,210 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:39:34,211 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:39:34,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:39:34,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:34,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:34,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:34,403 INFO L321 Elim1Store]: treesize reduction 80, result has 33.3 percent of original size [2022-11-22 02:39:34,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 63 [2022-11-22 02:39:34,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:34,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:34,499 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 02:39:34,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 02:39:35,947 INFO L321 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-11-22 02:39:35,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 266 treesize of output 312 [2022-11-22 02:39:36,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:39:36,313 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-22 02:39:36,314 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 29 treesize of output 31 [2022-11-22 02:39:36,440 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 02:39:36,442 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:39:37,641 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '809#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:39:37,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:39:37,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:39:37,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-22 02:39:37,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319587146] [2022-11-22 02:39:37,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:39:37,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 02:39:37,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:39:37,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 02:39:37,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:39:37,643 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-22 02:39:37,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:39:37,780 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-11-22 02:39:37,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:39:37,781 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2022-11-22 02:39:37,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:39:37,782 INFO L225 Difference]: With dead ends: 26 [2022-11-22 02:39:37,782 INFO L226 Difference]: Without dead ends: 23 [2022-11-22 02:39:37,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-11-22 02:39:37,784 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:39:37,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 40 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:39:37,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-22 02:39:37,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-22 02:39:37,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:39:37,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-11-22 02:39:37,791 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 27 [2022-11-22 02:39:37,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:39:37,791 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-11-22 02:39:37,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-22 02:39:37,791 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-11-22 02:39:37,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-22 02:39:37,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:37,792 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:39:37,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:39:38,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:39:38,006 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:39:38,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:38,006 INFO L85 PathProgramCache]: Analyzing trace with hash -234104468, now seen corresponding path program 4 times [2022-11-22 02:39:38,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:39:38,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043909051] [2022-11-22 02:39:38,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:39:38,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:39:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:39:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 02:39:39,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:39:39,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043909051] [2022-11-22 02:39:39,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043909051] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:39:39,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012409967] [2022-11-22 02:39:39,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:39:39,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:39:39,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:39:39,636 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:39:39,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:39:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:39:39,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-22 02:39:39,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:39:39,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 02:39:40,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:40,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-11-22 02:39:40,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:40,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2022-11-22 02:39:40,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2022-11-22 02:39:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 02:39:40,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:39:41,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012409967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:39:41,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1237711727] [2022-11-22 02:39:41,131 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 02:39:41,131 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:39:41,131 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:39:41,132 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:39:41,132 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:39:41,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:41,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:41,291 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 02:39:41,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 02:39:41,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:41,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:41,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:41,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 45 [2022-11-22 02:39:42,713 INFO L321 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-11-22 02:39:42,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-22 02:39:42,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:39:42,770 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-22 02:39:42,770 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 29 treesize of output 31 [2022-11-22 02:39:42,876 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 02:39:42,877 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:39:44,434 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1054#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:39:44,434 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:39:44,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:39:44,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2022-11-22 02:39:44,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866420793] [2022-11-22 02:39:44,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:39:44,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-22 02:39:44,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:39:44,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-22 02:39:44,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-11-22 02:39:44,437 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 25 states, 23 states have (on average 1.391304347826087) internal successors, (32), 25 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-22 02:39:47,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:39:47,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:39:47,765 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2022-11-22 02:39:47,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 02:39:47,765 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.391304347826087) internal successors, (32), 25 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 28 [2022-11-22 02:39:47,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:39:47,767 INFO L225 Difference]: With dead ends: 41 [2022-11-22 02:39:47,767 INFO L226 Difference]: Without dead ends: 37 [2022-11-22 02:39:47,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=376, Invalid=2930, Unknown=0, NotChecked=0, Total=3306 [2022-11-22 02:39:47,770 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:39:47,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 70 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 356 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-22 02:39:47,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-22 02:39:47,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2022-11-22 02:39:47,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:39:47,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-11-22 02:39:47,781 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 28 [2022-11-22 02:39:47,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:39:47,781 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-11-22 02:39:47,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.391304347826087) internal successors, (32), 25 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-22 02:39:47,782 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-11-22 02:39:47,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-22 02:39:47,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:47,783 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:39:47,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:39:47,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 02:39:47,989 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:39:47,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:47,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1332201173, now seen corresponding path program 5 times [2022-11-22 02:39:47,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:39:47,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234361981] [2022-11-22 02:39:47,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:39:47,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:39:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:39:48,101 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:39:48,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:39:48,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234361981] [2022-11-22 02:39:48,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234361981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:39:48,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116095429] [2022-11-22 02:39:48,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:39:48,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:39:48,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:39:48,104 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:39:48,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:39:48,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 02:39:48,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:39:48,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:39:48,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:39:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 02:39:48,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:39:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 02:39:48,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116095429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:39:48,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1168256801] [2022-11-22 02:39:48,317 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 02:39:48,317 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:39:48,318 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:39:48,318 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:39:48,319 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:39:48,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:48,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:48,491 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 02:39:48,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 02:39:48,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:48,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:48,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:48,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 45 [2022-11-22 02:39:50,032 INFO L321 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-11-22 02:39:50,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 265 treesize of output 311 [2022-11-22 02:39:50,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:39:50,389 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-22 02:39:50,390 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 29 treesize of output 31 [2022-11-22 02:39:50,489 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 02:39:50,490 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:39:51,547 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1385#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:39:51,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:39:51,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:39:51,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-11-22 02:39:51,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894932746] [2022-11-22 02:39:51,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:39:51,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 02:39:51,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:39:51,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 02:39:51,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-11-22 02:39:51,550 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-22 02:39:51,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:39:51,730 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2022-11-22 02:39:51,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 02:39:51,730 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 29 [2022-11-22 02:39:51,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:39:51,731 INFO L225 Difference]: With dead ends: 52 [2022-11-22 02:39:51,731 INFO L226 Difference]: Without dead ends: 37 [2022-11-22 02:39:51,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-11-22 02:39:51,732 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:39:51,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 68 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:39:51,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-22 02:39:51,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2022-11-22 02:39:51,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-22 02:39:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-11-22 02:39:51,744 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 29 [2022-11-22 02:39:51,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:39:51,745 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-11-22 02:39:51,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-22 02:39:51,745 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-11-22 02:39:51,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-22 02:39:51,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:51,746 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:39:51,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-22 02:39:51,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:39:51,953 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:39:51,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:51,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1872081512, now seen corresponding path program 6 times [2022-11-22 02:39:51,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:39:51,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137910010] [2022-11-22 02:39:51,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:39:51,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:39:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:39:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 02:39:55,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:39:55,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137910010] [2022-11-22 02:39:55,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137910010] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:39:55,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876546952] [2022-11-22 02:39:55,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:39:55,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:39:55,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:39:55,406 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:39:55,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:39:55,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:39:55,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:39:55,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-22 02:39:55,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:39:55,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 02:39:55,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:55,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:55,979 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 0 case distinctions, treesize of input 49 treesize of output 50 [2022-11-22 02:39:56,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:56,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:39:56,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:56,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:56,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 70 [2022-11-22 02:39:56,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:56,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:56,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 128 treesize of output 83 [2022-11-22 02:39:56,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 47 [2022-11-22 02:39:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 02:39:56,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:39:58,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876546952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:39:58,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2088387024] [2022-11-22 02:39:58,022 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 02:39:58,022 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:39:58,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:39:58,023 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:39:58,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:39:58,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:58,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:58,196 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 02:39:58,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 02:39:58,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:58,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:58,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:39:58,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 45 [2022-11-22 02:39:59,687 INFO L321 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-11-22 02:39:59,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 56 [2022-11-22 02:39:59,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:39:59,763 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-22 02:39:59,763 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 29 treesize of output 31 [2022-11-22 02:39:59,887 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 02:39:59,889 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:40:01,724 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1721#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:40:01,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:40:01,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:40:01,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 32 [2022-11-22 02:40:01,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421572643] [2022-11-22 02:40:01,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:40:01,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-22 02:40:01,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:40:01,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-22 02:40:01,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2582, Unknown=0, NotChecked=0, Total=2862 [2022-11-22 02:40:01,727 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-22 02:40:05,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:40:06,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:40:06,354 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2022-11-22 02:40:06,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 02:40:06,354 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 35 [2022-11-22 02:40:06,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:40:06,356 INFO L225 Difference]: With dead ends: 55 [2022-11-22 02:40:06,356 INFO L226 Difference]: Without dead ends: 51 [2022-11-22 02:40:06,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=576, Invalid=4536, Unknown=0, NotChecked=0, Total=5112 [2022-11-22 02:40:06,359 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 62 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 83 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:40:06,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 91 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 559 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-11-22 02:40:06,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-22 02:40:06,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2022-11-22 02:40:06,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 02:40:06,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2022-11-22 02:40:06,378 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 35 [2022-11-22 02:40:06,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:40:06,378 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2022-11-22 02:40:06,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-22 02:40:06,379 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2022-11-22 02:40:06,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-22 02:40:06,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:40:06,380 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:40:06,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-22 02:40:06,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:40:06,586 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:40:06,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:40:06,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1785004767, now seen corresponding path program 7 times [2022-11-22 02:40:06,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:40:06,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878458002] [2022-11-22 02:40:06,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:40:06,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:40:06,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-22 02:40:06,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:40:06,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878458002] [2022-11-22 02:40:06,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878458002] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:40:06,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993911261] [2022-11-22 02:40:06,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:40:06,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:40:06,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:40:06,727 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:40:06,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:40:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:06,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:40:06,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:40:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-22 02:40:06,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:40:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-22 02:40:07,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993911261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:40:07,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [262609131] [2022-11-22 02:40:07,097 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 02:40:07,097 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:40:07,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:40:07,097 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:40:07,098 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:40:07,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:40:07,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:40:07,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:40:07,265 INFO L321 Elim1Store]: treesize reduction 80, result has 33.3 percent of original size [2022-11-22 02:40:07,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 63 [2022-11-22 02:40:07,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:40:07,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:40:07,390 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 02:40:07,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 02:40:08,809 INFO L321 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-11-22 02:40:08,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 266 treesize of output 312 [2022-11-22 02:40:09,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:40:09,145 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-22 02:40:09,145 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 29 treesize of output 31 [2022-11-22 02:40:09,251 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 02:40:09,253 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:40:10,524 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2157#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:40:10,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:40:10,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:40:10,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-11-22 02:40:10,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244609247] [2022-11-22 02:40:10,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:40:10,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 02:40:10,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:40:10,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 02:40:10,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 02:40:10,527 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-22 02:40:11,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:40:11,013 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2022-11-22 02:40:11,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 02:40:11,013 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 35 [2022-11-22 02:40:11,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:40:11,014 INFO L225 Difference]: With dead ends: 59 [2022-11-22 02:40:11,014 INFO L226 Difference]: Without dead ends: 42 [2022-11-22 02:40:11,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=308, Invalid=2044, Unknown=0, NotChecked=0, Total=2352 [2022-11-22 02:40:11,016 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 55 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:40:11,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 106 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:40:11,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-22 02:40:11,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-11-22 02:40:11,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 02:40:11,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-11-22 02:40:11,031 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 35 [2022-11-22 02:40:11,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:40:11,031 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-11-22 02:40:11,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-22 02:40:11,032 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-11-22 02:40:11,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-22 02:40:11,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:40:11,033 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:40:11,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:40:11,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:40:11,239 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:40:11,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:40:11,239 INFO L85 PathProgramCache]: Analyzing trace with hash -8328893, now seen corresponding path program 8 times [2022-11-22 02:40:11,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:40:11,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212596921] [2022-11-22 02:40:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:40:11,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:40:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:11,448 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 02:40:11,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:40:11,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212596921] [2022-11-22 02:40:11,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212596921] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:40:11,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083535761] [2022-11-22 02:40:11,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:40:11,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:40:11,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:40:11,452 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:40:11,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:40:11,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-22 02:40:11,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:40:11,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-22 02:40:11,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:40:11,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 02:40:12,119 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-22 02:40:12,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 77 [2022-11-22 02:40:12,233 INFO L321 Elim1Store]: treesize reduction 60, result has 1.6 percent of original size [2022-11-22 02:40:12,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 90 [2022-11-22 02:40:12,427 INFO L321 Elim1Store]: treesize reduction 150, result has 16.2 percent of original size [2022-11-22 02:40:12,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 223 treesize of output 147 [2022-11-22 02:40:47,541 WARN L233 SmtUtils]: Spent 22.40s on a formula simplification. DAG size of input: 81 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:40:49,689 INFO L321 Elim1Store]: treesize reduction 107, result has 29.1 percent of original size [2022-11-22 02:40:49,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 255 treesize of output 96 [2022-11-22 02:40:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 02:40:49,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:40:59,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083535761] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:40:59,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [315362395] [2022-11-22 02:40:59,651 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 02:40:59,651 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:40:59,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:40:59,652 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:40:59,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:40:59,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:40:59,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:40:59,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:40:59,826 INFO L321 Elim1Store]: treesize reduction 80, result has 33.3 percent of original size [2022-11-22 02:40:59,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 63 [2022-11-22 02:40:59,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:40:59,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:40:59,952 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 02:40:59,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 02:41:01,160 INFO L321 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-11-22 02:41:01,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 56 [2022-11-22 02:41:01,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:41:01,215 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-22 02:41:01,215 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 29 treesize of output 31 [2022-11-22 02:41:01,308 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 02:41:01,309 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:41:03,343 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2555#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:41:03,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:41:03,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:41:03,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2022-11-22 02:41:03,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325924028] [2022-11-22 02:41:03,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:41:03,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-22 02:41:03,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:41:03,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-22 02:41:03,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=2277, Unknown=9, NotChecked=0, Total=2550 [2022-11-22 02:41:03,346 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 27 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 9 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-22 02:41:05,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:41:09,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:41:13,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:41:15,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:41:19,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:41:26,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:41:28,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:41:35,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:41:45,716 WARN L233 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 99 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:41:53,990 WARN L233 SmtUtils]: Spent 8.10s on a formula simplification. DAG size of input: 97 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:41:54,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:41:54,621 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-11-22 02:41:54,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-22 02:41:54,622 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 9 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 40 [2022-11-22 02:41:54,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:41:54,622 INFO L225 Difference]: With dead ends: 40 [2022-11-22 02:41:54,623 INFO L226 Difference]: Without dead ends: 33 [2022-11-22 02:41:54,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 81.7s TimeCoverageRelationStatistics Valid=592, Invalid=4224, Unknown=14, NotChecked=0, Total=4830 [2022-11-22 02:41:54,625 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 59 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:41:54,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 95 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 392 Invalid, 8 Unknown, 0 Unchecked, 17.4s Time] [2022-11-22 02:41:54,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-22 02:41:54,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-22 02:41:54,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 02:41:54,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-11-22 02:41:54,658 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 40 [2022-11-22 02:41:54,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:41:54,661 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-11-22 02:41:54,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 9 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-22 02:41:54,661 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-11-22 02:41:54,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-22 02:41:54,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:41:54,662 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:41:54,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:41:54,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 02:41:54,874 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:41:54,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:41:54,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1648562708, now seen corresponding path program 9 times [2022-11-22 02:41:54,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:41:54,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140618464] [2022-11-22 02:41:54,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:41:54,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:41:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:41:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-22 02:41:59,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:41:59,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140618464] [2022-11-22 02:41:59,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140618464] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:41:59,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476757184] [2022-11-22 02:41:59,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:41:59,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:41:59,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:41:59,619 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:41:59,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:41:59,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:41:59,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:41:59,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-22 02:41:59,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:41:59,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 02:42:00,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 62 [2022-11-22 02:42:00,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:42:00,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 82 [2022-11-22 02:42:00,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:42:00,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:00,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 102 [2022-11-22 02:42:01,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:01,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:01,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:01,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 243 treesize of output 132 [2022-11-22 02:42:02,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 81 [2022-11-22 02:42:02,401 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-22 02:42:02,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:42:04,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476757184] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:42:04,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [805279958] [2022-11-22 02:42:04,394 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 02:42:04,394 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:42:04,394 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:42:04,395 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:42:04,395 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:42:04,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:04,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:04,548 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 02:42:04,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 02:42:04,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:04,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:04,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:04,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 45 [2022-11-22 02:42:05,713 INFO L321 Elim1Store]: treesize reduction 182, result has 30.3 percent of original size [2022-11-22 02:42:05,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 265 treesize of output 311 [2022-11-22 02:42:06,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:42:06,022 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-22 02:42:06,023 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 29 treesize of output 31 [2022-11-22 02:42:06,136 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 02:42:06,138 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:42:08,584 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2945#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:42:08,584 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:42:08,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:42:08,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 39 [2022-11-22 02:42:08,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477626853] [2022-11-22 02:42:08,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:42:08,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-22 02:42:08,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:08,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-22 02:42:08,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=3582, Unknown=0, NotChecked=0, Total=3906 [2022-11-22 02:42:08,587 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 39 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 39 states have internal predecessors, (48), 11 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-22 02:42:13,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:42:15,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:15,876 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-11-22 02:42:15,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-22 02:42:15,877 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 39 states have internal predecessors, (48), 11 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 42 [2022-11-22 02:42:15,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:15,878 INFO L225 Difference]: With dead ends: 58 [2022-11-22 02:42:15,878 INFO L226 Difference]: Without dead ends: 54 [2022-11-22 02:42:15,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2490 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=742, Invalid=7448, Unknown=0, NotChecked=0, Total=8190 [2022-11-22 02:42:15,883 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 59 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 98 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:15,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 62 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 892 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2022-11-22 02:42:15,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-22 02:42:15,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2022-11-22 02:42:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-22 02:42:15,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2022-11-22 02:42:15,910 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 42 [2022-11-22 02:42:15,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:15,910 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2022-11-22 02:42:15,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 39 states have internal predecessors, (48), 11 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-22 02:42:15,910 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2022-11-22 02:42:15,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-22 02:42:15,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:15,911 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:15,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:42:16,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:16,116 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:42:16,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:16,116 INFO L85 PathProgramCache]: Analyzing trace with hash 433668693, now seen corresponding path program 10 times [2022-11-22 02:42:16,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:16,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30833472] [2022-11-22 02:42:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:16,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:16,326 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-22 02:42:16,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:16,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30833472] [2022-11-22 02:42:16,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30833472] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:42:16,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181670230] [2022-11-22 02:42:16,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:42:16,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:16,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:16,328 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:16,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 02:42:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:16,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:42:16,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-22 02:42:16,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:42:16,714 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-22 02:42:16,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181670230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:42:16,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1359712048] [2022-11-22 02:42:16,715 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 02:42:16,716 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:42:16,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:42:16,716 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:42:16,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:42:16,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:16,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:16,875 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 02:42:16,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 02:42:16,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:16,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:16,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:16,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 45 [2022-11-22 02:42:18,126 INFO L321 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-11-22 02:42:18,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-22 02:42:18,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:42:18,183 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-22 02:42:18,183 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 29 treesize of output 31 [2022-11-22 02:42:18,272 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 02:42:18,273 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:42:19,440 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3459#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:42:19,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:42:19,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:42:19,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-22 02:42:19,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248853515] [2022-11-22 02:42:19,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:42:19,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:42:19,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:19,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:42:19,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2022-11-22 02:42:19,442 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-22 02:42:19,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:19,681 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2022-11-22 02:42:19,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 02:42:19,681 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 43 [2022-11-22 02:42:19,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:19,682 INFO L225 Difference]: With dead ends: 64 [2022-11-22 02:42:19,682 INFO L226 Difference]: Without dead ends: 43 [2022-11-22 02:42:19,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 99 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=226, Invalid=1180, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 02:42:19,683 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:19,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 61 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:42:19,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-22 02:42:19,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2022-11-22 02:42:19,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-22 02:42:19,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-11-22 02:42:19,701 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 43 [2022-11-22 02:42:19,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:19,701 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-11-22 02:42:19,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-22 02:42:19,702 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-11-22 02:42:19,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-22 02:42:19,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:19,703 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:19,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 02:42:19,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:19,907 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:42:19,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:19,908 INFO L85 PathProgramCache]: Analyzing trace with hash 127792201, now seen corresponding path program 11 times [2022-11-22 02:42:19,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:19,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684004001] [2022-11-22 02:42:19,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:19,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:20,203 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-22 02:42:20,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:20,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684004001] [2022-11-22 02:42:20,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684004001] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:42:20,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691418024] [2022-11-22 02:42:20,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:42:20,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:20,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:20,206 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:20,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 02:42:20,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 02:42:20,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:42:20,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:42:20,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-22 02:42:20,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:42:20,554 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-22 02:42:20,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691418024] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:42:20,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [176543290] [2022-11-22 02:42:20,556 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 02:42:20,556 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:42:20,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:42:20,556 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:42:20,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:42:20,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:20,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:20,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:20,703 INFO L321 Elim1Store]: treesize reduction 80, result has 33.3 percent of original size [2022-11-22 02:42:20,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 63 [2022-11-22 02:42:20,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:20,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:20,790 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 02:42:20,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 02:42:22,029 INFO L321 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-11-22 02:42:22,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-22 02:42:22,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:42:22,087 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-22 02:42:22,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-22 02:42:22,171 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 02:42:22,172 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:42:23,297 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3955#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:42:23,297 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:42:23,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:42:23,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-22 02:42:23,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212466651] [2022-11-22 02:42:23,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:42:23,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:42:23,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:23,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:42:23,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2022-11-22 02:42:23,299 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-22 02:42:23,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:23,591 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-11-22 02:42:23,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 02:42:23,592 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 48 [2022-11-22 02:42:23,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:23,592 INFO L225 Difference]: With dead ends: 41 [2022-11-22 02:42:23,592 INFO L226 Difference]: Without dead ends: 38 [2022-11-22 02:42:23,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 115 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=268, Invalid=1538, Unknown=0, NotChecked=0, Total=1806 [2022-11-22 02:42:23,593 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:23,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 78 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:42:23,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-22 02:42:23,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-22 02:42:23,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-22 02:42:23,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2022-11-22 02:42:23,610 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 48 [2022-11-22 02:42:23,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:23,611 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2022-11-22 02:42:23,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 6 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-22 02:42:23,611 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2022-11-22 02:42:23,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-22 02:42:23,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:23,612 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:23,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-22 02:42:23,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 02:42:23,816 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:42:23,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:23,817 INFO L85 PathProgramCache]: Analyzing trace with hash -333903976, now seen corresponding path program 12 times [2022-11-22 02:42:23,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:23,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892697322] [2022-11-22 02:42:23,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:23,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 6 proven. 65 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 02:42:31,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:31,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892697322] [2022-11-22 02:42:31,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892697322] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:42:31,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711713419] [2022-11-22 02:42:31,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:42:31,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:31,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:31,583 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:31,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 02:42:31,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:42:31,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:42:31,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-22 02:42:31,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:31,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 02:42:32,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:32,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:32,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:32,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:32,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:32,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:32,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:32,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:32,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:42:32,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 85 [2022-11-22 02:42:32,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:32,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:42:32,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:32,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:32,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:32,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 105 [2022-11-22 02:42:33,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:33,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:33,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:33,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:33,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:33,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:33,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 103 [2022-11-22 02:42:33,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:33,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:33,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:33,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:33,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:33,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:33,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:33,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:42:33,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:33,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:33,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:33,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:33,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 17 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 123 [2022-11-22 02:42:33,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:33,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:33,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:33,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:33,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 396 treesize of output 191 [2022-11-22 02:42:35,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 11 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 405 treesize of output 125 [2022-11-22 02:42:49,981 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 02:42:49,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:42:59,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711713419] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:42:59,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [764292205] [2022-11-22 02:42:59,301 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 02:42:59,301 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:42:59,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:42:59,302 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:42:59,302 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:42:59,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:59,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:59,437 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 02:42:59,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 02:42:59,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:59,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:59,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:42:59,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 45 [2022-11-22 02:43:00,673 INFO L321 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-11-22 02:43:00,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-22 02:43:00,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:43:00,728 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-22 02:43:00,728 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 29 treesize of output 31 [2022-11-22 02:43:00,832 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 02:43:00,833 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:43:03,599 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4373#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:43:03,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:43:03,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:43:03,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 45 [2022-11-22 02:43:03,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462351185] [2022-11-22 02:43:03,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:43:03,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-22 02:43:03,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:03,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-22 02:43:03,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=4655, Unknown=1, NotChecked=0, Total=4970 [2022-11-22 02:43:03,603 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 45 states, 43 states have (on average 1.302325581395349) internal successors, (56), 44 states have internal predecessors, (56), 13 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-22 02:43:09,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:43:12,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:43:12,497 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2022-11-22 02:43:12,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-22 02:43:12,498 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.302325581395349) internal successors, (56), 44 states have internal predecessors, (56), 13 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 49 [2022-11-22 02:43:12,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:43:12,498 INFO L225 Difference]: With dead ends: 58 [2022-11-22 02:43:12,498 INFO L226 Difference]: Without dead ends: 54 [2022-11-22 02:43:12,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=751, Invalid=9148, Unknown=1, NotChecked=0, Total=9900 [2022-11-22 02:43:12,502 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 96 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:43:12,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 119 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1213 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-11-22 02:43:12,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-22 02:43:12,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2022-11-22 02:43:12,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-22 02:43:12,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-11-22 02:43:12,539 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 49 [2022-11-22 02:43:12,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:43:12,539 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-11-22 02:43:12,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.302325581395349) internal successors, (56), 44 states have internal predecessors, (56), 13 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-22 02:43:12,539 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-11-22 02:43:12,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-22 02:43:12,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:12,540 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:43:12,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 02:43:12,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 02:43:12,746 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:12,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:12,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1761583575, now seen corresponding path program 13 times [2022-11-22 02:43:12,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:12,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919755088] [2022-11-22 02:43:12,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:12,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 16 proven. 40 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-22 02:43:12,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:43:12,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919755088] [2022-11-22 02:43:12,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919755088] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:43:12,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093239104] [2022-11-22 02:43:12,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:43:12,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:43:12,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:43:12,999 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:43:13,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 02:43:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:13,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:43:13,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:43:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-22 02:43:13,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:43:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-22 02:43:13,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093239104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:43:13,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2107761574] [2022-11-22 02:43:13,477 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 02:43:13,477 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:43:13,477 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:43:13,478 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:43:13,478 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:43:13,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:13,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:13,641 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 02:43:13,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 02:43:13,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:13,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:13,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:13,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 45 [2022-11-22 02:43:14,776 INFO L321 Elim1Store]: treesize reduction 47, result has 48.4 percent of original size [2022-11-22 02:43:14,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-22 02:43:14,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:43:14,828 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-22 02:43:14,829 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 29 treesize of output 31 [2022-11-22 02:43:14,922 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-22 02:43:14,923 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:43:16,131 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4930#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~N~0#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~N~0#1| 2147483648)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_~k~0#1|) 1 0)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_~N~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 02:43:16,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:43:16,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:43:16,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-11-22 02:43:16,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037416253] [2022-11-22 02:43:16,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:43:16,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-22 02:43:16,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:16,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-22 02:43:16,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2022-11-22 02:43:16,134 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-22 02:43:16,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:43:16,453 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2022-11-22 02:43:16,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-22 02:43:16,453 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 50 [2022-11-22 02:43:16,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:43:16,454 INFO L225 Difference]: With dead ends: 79 [2022-11-22 02:43:16,454 INFO L226 Difference]: Without dead ends: 55 [2022-11-22 02:43:16,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 117 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=279, Invalid=1443, Unknown=0, NotChecked=0, Total=1722 [2022-11-22 02:43:16,455 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:43:16,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 85 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:43:16,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-22 02:43:16,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2022-11-22 02:43:16,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-22 02:43:16,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2022-11-22 02:43:16,486 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 50 [2022-11-22 02:43:16,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:43:16,486 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2022-11-22 02:43:16,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-22 02:43:16,487 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2022-11-22 02:43:16,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-22 02:43:16,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:16,488 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:43:16,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 02:43:16,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f139dc9-a5e0-48f8-b54b-49b26d841294/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 02:43:16,695 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:16,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:16,696 INFO L85 PathProgramCache]: Analyzing trace with hash 499614316, now seen corresponding path program 14 times [2022-11-22 02:43:16,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:16,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378330061] [2022-11-22 02:43:16,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:16,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat