./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --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 e98c2efe8dc7dfa25efbae5d9b3e7693444730d8a672856a92fef54f1a5fbcae --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:50:53,377 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:50:53,483 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:50:53,492 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:50:53,493 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:50:53,529 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:50:53,530 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:50:53,530 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:50:53,531 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:50:53,532 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:50:53,532 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:50:53,533 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:50:53,534 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:50:53,534 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:50:53,535 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:50:53,536 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:50:53,536 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:50:53,537 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:50:53,538 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:50:53,538 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:50:53,539 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:50:53,540 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:50:53,541 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:50:53,542 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:50:53,545 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:50:53,546 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:50:53,546 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:50:53,547 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:50:53,547 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:50:53,548 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:50:53,548 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:50:53,549 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:50:53,549 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:50:53,550 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:50:53,550 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:50:53,550 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:50:53,551 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:50:53,551 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:50:53,551 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:50:53,551 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:50:53,552 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:50:53,553 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:50:53,553 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:50:53,553 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:50:53,554 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:50:53,554 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98c2efe8dc7dfa25efbae5d9b3e7693444730d8a672856a92fef54f1a5fbcae [2023-11-12 00:50:53,852 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:50:53,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:50:53,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:50:53,888 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:50:53,889 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:50:53,891 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c [2023-11-12 00:50:57,127 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:50:57,359 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:50:57,360 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c [2023-11-12 00:50:57,368 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/data/aaf9dc429/2f1c5b1620764f2880021eabfad1f9d3/FLAGf8e657413 [2023-11-12 00:50:57,393 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/data/aaf9dc429/2f1c5b1620764f2880021eabfad1f9d3 [2023-11-12 00:50:57,400 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:50:57,403 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:50:57,408 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:50:57,408 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:50:57,414 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:50:57,415 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:50:57" (1/1) ... [2023-11-12 00:50:57,416 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bc96399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:57, skipping insertion in model container [2023-11-12 00:50:57,417 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:50:57" (1/1) ... [2023-11-12 00:50:57,446 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:50:57,653 WARN L240 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_ce230523-4720-48fa-bd21-0b586882957c/sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c[331,344] [2023-11-12 00:50:57,687 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:50:57,698 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:50:57,714 WARN L240 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_ce230523-4720-48fa-bd21-0b586882957c/sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c[331,344] [2023-11-12 00:50:57,740 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:50:57,759 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:50:57,760 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:57 WrapperNode [2023-11-12 00:50:57,760 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:50:57,762 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:50:57,762 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:50:57,762 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:50:57,771 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:57" (1/1) ... [2023-11-12 00:50:57,792 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:57" (1/1) ... [2023-11-12 00:50:57,825 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2023-11-12 00:50:57,825 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:50:57,826 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:50:57,826 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:50:57,826 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:50:57,838 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:57" (1/1) ... [2023-11-12 00:50:57,838 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:57" (1/1) ... [2023-11-12 00:50:57,845 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:57" (1/1) ... [2023-11-12 00:50:57,845 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:57" (1/1) ... [2023-11-12 00:50:57,861 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:57" (1/1) ... [2023-11-12 00:50:57,865 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:57" (1/1) ... [2023-11-12 00:50:57,866 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:57" (1/1) ... [2023-11-12 00:50:57,867 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:57" (1/1) ... [2023-11-12 00:50:57,877 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:50:57,879 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:50:57,880 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:50:57,880 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:50:57,881 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:57" (1/1) ... [2023-11-12 00:50:57,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:50:57,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:57,920 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:50:57,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:50:57,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:50:57,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:50:57,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:50:57,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:50:57,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:50:57,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:50:57,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:50:57,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:50:58,049 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:50:58,052 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:50:58,266 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:50:58,449 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:50:58,453 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 00:50:58,464 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:50:58 BoogieIcfgContainer [2023-11-12 00:50:58,464 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:50:58,467 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:50:58,468 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:50:58,472 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:50:58,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:50:57" (1/3) ... [2023-11-12 00:50:58,473 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad84e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:50:58, skipping insertion in model container [2023-11-12 00:50:58,473 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:57" (2/3) ... [2023-11-12 00:50:58,474 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad84e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:50:58, skipping insertion in model container [2023-11-12 00:50:58,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:50:58" (3/3) ... [2023-11-12 00:50:58,475 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_3.c [2023-11-12 00:50:58,499 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:50:58,500 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:50:58,568 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:50:58,578 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=LoopHeads, 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;@68fd12af, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:50:58,581 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:50:58,586 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:50:58,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:50:58,593 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:58,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:50:58,595 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:58,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:58,604 INFO L85 PathProgramCache]: Analyzing trace with hash 113225757, now seen corresponding path program 1 times [2023-11-12 00:50:58,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:58,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936171812] [2023-11-12 00:50:58,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:58,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:58,725 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:50:58,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616275787] [2023-11-12 00:50:58,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:58,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:58,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:58,731 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:58,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:50:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:58,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:50:58,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:50:58,946 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:50:58,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:58,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936171812] [2023-11-12 00:50:58,947 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:50:58,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616275787] [2023-11-12 00:50:58,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616275787] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:58,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:50:58,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:50:58,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081440988] [2023-11-12 00:50:58,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:58,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:58,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:59,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:59,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:50:59,013 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:50:59,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:59,075 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2023-11-12 00:50:59,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:50:59,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-12 00:50:59,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:59,090 INFO L225 Difference]: With dead ends: 15 [2023-11-12 00:50:59,090 INFO L226 Difference]: Without dead ends: 8 [2023-11-12 00:50:59,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:50:59,099 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:59,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:50:59,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2023-11-12 00:50:59,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2023-11-12 00:50:59,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:50:59,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2023-11-12 00:50:59,135 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2023-11-12 00:50:59,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:59,136 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2023-11-12 00:50:59,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:50:59,136 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2023-11-12 00:50:59,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:50:59,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:59,137 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 00:50:59,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:50:59,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 00:50:59,344 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:59,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:59,345 INFO L85 PathProgramCache]: Analyzing trace with hash -777643133, now seen corresponding path program 1 times [2023-11-12 00:50:59,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:59,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780860995] [2023-11-12 00:50:59,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:59,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:59,366 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:50:59,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362467957] [2023-11-12 00:50:59,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:59,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:59,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:59,371 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:59,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:50:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:59,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:50:59,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:59,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:50:59,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:50:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:50:59,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:59,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780860995] [2023-11-12 00:50:59,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:50:59,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362467957] [2023-11-12 00:50:59,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362467957] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:50:59,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1268139005] [2023-11-12 00:50:59,587 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-11-12 00:50:59,588 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:50:59,592 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:50:59,598 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:50:59,598 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:51:00,189 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:51:00,303 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '92#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (mod (+ 2 (div (mod ~N~0 4294967296) (* 2 (mod |ULTIMATE.start_main_~R~0#1| 2147483648)))) 4294967296) (mod |ULTIMATE.start_main_~j~0#1| 4294967296)))' at error location [2023-11-12 00:51:00,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:51:00,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:51:00,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-12 00:51:00,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822071508] [2023-11-12 00:51:00,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:51:00,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:51:00,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:00,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:51:00,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:51:00,310 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:00,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:00,369 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2023-11-12 00:51:00,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:51:00,370 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-12 00:51:00,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:00,371 INFO L225 Difference]: With dead ends: 16 [2023-11-12 00:51:00,371 INFO L226 Difference]: Without dead ends: 11 [2023-11-12 00:51:00,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:51:00,375 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:00,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:51:00,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-12 00:51:00,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-12 00:51:00,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:00,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2023-11-12 00:51:00,389 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2023-11-12 00:51:00,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:00,390 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2023-11-12 00:51:00,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2023-11-12 00:51:00,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 00:51:00,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:00,393 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2023-11-12 00:51:00,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:00,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:00,600 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:00,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:00,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1028499043, now seen corresponding path program 2 times [2023-11-12 00:51:00,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:00,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046495924] [2023-11-12 00:51:00,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:00,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:00,625 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:51:00,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460051735] [2023-11-12 00:51:00,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:51:00,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:00,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:00,631 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:00,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:51:00,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-12 00:51:00,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:51:00,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 00:51:00,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:00,902 INFO L351 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 32 treesize of output 16 [2023-11-12 00:51:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:51:00,933 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:51:00,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:00,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046495924] [2023-11-12 00:51:00,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:51:00,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460051735] [2023-11-12 00:51:00,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460051735] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:00,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:51:00,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:51:00,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252801789] [2023-11-12 00:51:00,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:00,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:51:00,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:00,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:51:00,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:51:00,938 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:00,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:00,999 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2023-11-12 00:51:01,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:51:01,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-12 00:51:01,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:01,001 INFO L225 Difference]: With dead ends: 16 [2023-11-12 00:51:01,001 INFO L226 Difference]: Without dead ends: 14 [2023-11-12 00:51:01,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:51:01,003 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:01,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 5 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:51:01,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-12 00:51:01,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2023-11-12 00:51:01,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:01,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-11-12 00:51:01,015 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2023-11-12 00:51:01,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:01,015 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-11-12 00:51:01,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:01,016 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-11-12 00:51:01,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 00:51:01,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:01,017 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:01,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:01,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:01,223 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:01,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:01,223 INFO L85 PathProgramCache]: Analyzing trace with hash 286903242, now seen corresponding path program 1 times [2023-11-12 00:51:01,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:01,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346277310] [2023-11-12 00:51:01,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:01,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:01,243 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:51:01,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236692380] [2023-11-12 00:51:01,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:01,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:01,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:01,249 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:01,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:51:01,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:01,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:51:01,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:51:01,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:51:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:51:01,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:01,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346277310] [2023-11-12 00:51:01,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:51:01,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236692380] [2023-11-12 00:51:01,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236692380] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:51:01,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1634342918] [2023-11-12 00:51:01,512 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:51:01,513 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:51:01,514 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:51:01,514 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:51:01,514 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:51:02,043 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:51:02,361 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '284#(and (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|))' at error location [2023-11-12 00:51:02,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:51:02,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:51:02,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-12 00:51:02,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214883117] [2023-11-12 00:51:02,362 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:51:02,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 00:51:02,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:02,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 00:51:02,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:51:02,364 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:02,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:02,424 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2023-11-12 00:51:02,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:51:02,425 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-12 00:51:02,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:02,426 INFO L225 Difference]: With dead ends: 26 [2023-11-12 00:51:02,426 INFO L226 Difference]: Without dead ends: 19 [2023-11-12 00:51:02,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:51:02,429 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:02,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:51:02,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-12 00:51:02,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-12 00:51:02,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:02,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-11-12 00:51:02,444 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2023-11-12 00:51:02,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:02,448 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-11-12 00:51:02,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:02,449 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-11-12 00:51:02,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 00:51:02,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:02,450 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:02,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:02,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:02,657 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:02,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:02,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1076923786, now seen corresponding path program 2 times [2023-11-12 00:51:02,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:02,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004434612] [2023-11-12 00:51:02,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:02,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:02,685 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:51:02,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225149908] [2023-11-12 00:51:02,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:51:02,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:02,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:02,687 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:02,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:51:02,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:51:02,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:51:02,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 00:51:02,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:03,221 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:51:03,222 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 62 [2023-11-12 00:51:03,341 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-12 00:51:03,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:51:03,787 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:51:03,787 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 104 [2023-11-12 00:51:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-12 00:51:04,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:04,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004434612] [2023-11-12 00:51:04,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:51:04,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225149908] [2023-11-12 00:51:04,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225149908] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:51:04,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2070457043] [2023-11-12 00:51:04,880 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:51:04,880 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:51:04,880 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:51:04,880 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:51:04,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:51:05,356 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:51:05,715 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '474#(and (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|))' at error location [2023-11-12 00:51:05,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:51:05,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:51:05,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-12 00:51:05,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700364525] [2023-11-12 00:51:05,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:51:05,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 00:51:05,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:05,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 00:51:05,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-12 00:51:05,717 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:07,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-12 00:51:09,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-12 00:51:10,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:10,423 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2023-11-12 00:51:10,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:51:10,423 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-12 00:51:10,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:10,424 INFO L225 Difference]: With dead ends: 31 [2023-11-12 00:51:10,424 INFO L226 Difference]: Without dead ends: 29 [2023-11-12 00:51:10,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:51:10,426 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:10,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 9 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 2 Unknown, 0 Unchecked, 3.7s Time] [2023-11-12 00:51:10,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-12 00:51:10,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-11-12 00:51:10,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:10,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2023-11-12 00:51:10,436 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 18 [2023-11-12 00:51:10,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:10,437 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2023-11-12 00:51:10,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:10,437 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2023-11-12 00:51:10,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-12 00:51:10,438 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:10,438 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 4, 4, 1, 1, 1, 1] [2023-11-12 00:51:10,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:10,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:10,639 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:10,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:10,640 INFO L85 PathProgramCache]: Analyzing trace with hash 453300637, now seen corresponding path program 3 times [2023-11-12 00:51:10,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:10,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933583124] [2023-11-12 00:51:10,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:10,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:10,663 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:51:10,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177335285] [2023-11-12 00:51:10,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:51:10,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:10,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:10,665 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:10,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:51:10,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:51:10,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:51:10,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 00:51:10,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-12 00:51:10,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:51:11,278 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-12 00:51:11,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:11,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933583124] [2023-11-12 00:51:11,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:51:11,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177335285] [2023-11-12 00:51:11,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177335285] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:51:11,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1427956487] [2023-11-12 00:51:11,282 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:51:11,282 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:51:11,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:51:11,282 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:51:11,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:51:11,517 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:51:11,650 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '756#(and (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|))' at error location [2023-11-12 00:51:11,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:51:11,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:51:11,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-11-12 00:51:11,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754162652] [2023-11-12 00:51:11,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:51:11,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-12 00:51:11,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:11,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-12 00:51:11,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=467, Unknown=0, NotChecked=0, Total=756 [2023-11-12 00:51:11,653 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:11,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:11,739 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2023-11-12 00:51:11,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 00:51:11,740 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-12 00:51:11,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:11,741 INFO L225 Difference]: With dead ends: 56 [2023-11-12 00:51:11,741 INFO L226 Difference]: Without dead ends: 40 [2023-11-12 00:51:11,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=467, Unknown=0, NotChecked=0, Total=756 [2023-11-12 00:51:11,742 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:11,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:51:11,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-12 00:51:11,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-12 00:51:11,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:11,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2023-11-12 00:51:11,755 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 27 [2023-11-12 00:51:11,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:11,755 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2023-11-12 00:51:11,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:11,756 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2023-11-12 00:51:11,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-12 00:51:11,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:11,757 INFO L195 NwaCegarLoop]: trace histogram [22, 5, 4, 4, 1, 1, 1, 1] [2023-11-12 00:51:11,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:11,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:11,964 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:11,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:11,964 INFO L85 PathProgramCache]: Analyzing trace with hash 864169501, now seen corresponding path program 4 times [2023-11-12 00:51:11,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:11,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167389167] [2023-11-12 00:51:11,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:11,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:12,016 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:51:12,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776678327] [2023-11-12 00:51:12,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:51:12,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:12,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:12,018 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:12,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:51:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:12,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-12 00:51:12,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-12 00:51:12,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:51:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-12 00:51:13,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:13,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167389167] [2023-11-12 00:51:13,841 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:51:13,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776678327] [2023-11-12 00:51:13,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776678327] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:51:13,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1357711232] [2023-11-12 00:51:13,843 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:51:13,843 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:51:13,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:51:13,844 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:51:13,844 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:51:14,100 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:51:14,250 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1193#(and (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|))' at error location [2023-11-12 00:51:14,251 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:51:14,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:51:14,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2023-11-12 00:51:14,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393929320] [2023-11-12 00:51:14,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:51:14,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-12 00:51:14,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:14,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-12 00:51:14,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1141, Invalid=1511, Unknown=0, NotChecked=0, Total=2652 [2023-11-12 00:51:14,255 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:14,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:14,410 INFO L93 Difference]: Finished difference Result 80 states and 105 transitions. [2023-11-12 00:51:14,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-12 00:51:14,413 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-12 00:51:14,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:14,418 INFO L225 Difference]: With dead ends: 80 [2023-11-12 00:51:14,418 INFO L226 Difference]: Without dead ends: 64 [2023-11-12 00:51:14,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1141, Invalid=1511, Unknown=0, NotChecked=0, Total=2652 [2023-11-12 00:51:14,421 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:14,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:51:14,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-12 00:51:14,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-12 00:51:14,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:14,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2023-11-12 00:51:14,454 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 39 [2023-11-12 00:51:14,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:14,455 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2023-11-12 00:51:14,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:14,455 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2023-11-12 00:51:14,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-12 00:51:14,459 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:14,459 INFO L195 NwaCegarLoop]: trace histogram [46, 5, 4, 4, 1, 1, 1, 1] [2023-11-12 00:51:14,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:14,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 00:51:14,667 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:14,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:14,667 INFO L85 PathProgramCache]: Analyzing trace with hash -173496547, now seen corresponding path program 5 times [2023-11-12 00:51:14,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:14,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927928357] [2023-11-12 00:51:14,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:14,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:14,737 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:51:14,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73398984] [2023-11-12 00:51:14,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:51:14,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:14,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:14,739 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:14,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce230523-4720-48fa-bd21-0b586882957c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:51:16,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-12 00:51:16,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:51:16,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-12 00:51:16,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:18,523 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:51:18,524 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 187 treesize of output 395 [2023-11-12 00:51:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2023-11-12 00:51:18,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:51:40,567 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:51:40,568 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 606 treesize of output 1430