./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/heavy-1.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_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/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_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/heavy-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/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_856533c7-009d-4269-9d82-c3d9b0d737db/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 544ff1a31d34f1c818140bb31fb5c7091aef904c3b9f7e17a0cc8560e99eb61a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:12:49,464 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:12:49,589 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:12:49,598 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:12:49,599 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:12:49,636 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:12:49,637 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:12:49,638 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:12:49,639 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:12:49,644 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:12:49,644 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:12:49,645 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:12:49,645 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:12:49,647 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:12:49,647 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:12:49,648 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:12:49,648 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:12:49,649 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:12:49,649 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:12:49,650 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:12:49,650 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:12:49,651 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:12:49,652 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:12:49,652 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:12:49,653 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:12:49,653 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:12:49,653 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:12:49,654 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:12:49,654 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:12:49,655 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:12:49,656 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:12:49,656 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:12:49,657 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:12:49,657 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:12:49,657 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:12:49,657 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:12:49,658 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:12:49,658 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:12:49,658 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:12:49,658 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:12:49,659 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:12:49,659 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:12:49,659 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:12:49,660 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:12:49,660 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:12:49,661 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_856533c7-009d-4269-9d82-c3d9b0d737db/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 544ff1a31d34f1c818140bb31fb5c7091aef904c3b9f7e17a0cc8560e99eb61a [2023-11-12 00:12:49,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:12:49,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:12:49,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:12:49,989 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:12:49,990 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:12:49,991 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/loops/heavy-1.c [2023-11-12 00:12:53,214 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:12:53,465 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:12:53,466 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/sv-benchmarks/c/loops/heavy-1.c [2023-11-12 00:12:53,474 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/data/aa45090a6/13c2f1bef2574142a291814325b3c876/FLAG52a9714e1 [2023-11-12 00:12:53,490 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/data/aa45090a6/13c2f1bef2574142a291814325b3c876 [2023-11-12 00:12:53,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:12:53,494 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:12:53,496 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:12:53,496 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:12:53,502 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:12:53,503 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:12:53" (1/1) ... [2023-11-12 00:12:53,504 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9c1eeea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:53, skipping insertion in model container [2023-11-12 00:12:53,504 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:12:53" (1/1) ... [2023-11-12 00:12:53,524 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:12:53,704 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_856533c7-009d-4269-9d82-c3d9b0d737db/sv-benchmarks/c/loops/heavy-1.c[600,613] [2023-11-12 00:12:53,712 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:12:53,770 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:12:53,794 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_856533c7-009d-4269-9d82-c3d9b0d737db/sv-benchmarks/c/loops/heavy-1.c[600,613] [2023-11-12 00:12:53,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:12:53,851 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:12:53,852 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:53 WrapperNode [2023-11-12 00:12:53,852 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:12:53,853 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:12:53,854 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:12:53,854 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:12:53,861 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:53" (1/1) ... [2023-11-12 00:12:53,870 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:53" (1/1) ... [2023-11-12 00:12:53,893 INFO L138 Inliner]: procedures = 12, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 59 [2023-11-12 00:12:53,894 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:12:53,894 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:12:53,895 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:12:53,895 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:12:53,904 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:53" (1/1) ... [2023-11-12 00:12:53,904 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:53" (1/1) ... [2023-11-12 00:12:53,906 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:53" (1/1) ... [2023-11-12 00:12:53,906 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:53" (1/1) ... [2023-11-12 00:12:53,911 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:53" (1/1) ... [2023-11-12 00:12:53,915 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:53" (1/1) ... [2023-11-12 00:12:53,916 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:53" (1/1) ... [2023-11-12 00:12:53,917 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:53" (1/1) ... [2023-11-12 00:12:53,919 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:12:53,920 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:12:53,921 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:12:53,921 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:12:53,922 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:53" (1/1) ... [2023-11-12 00:12:53,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:12:53,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:53,981 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:12:54,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:12:54,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:12:54,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:12:54,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:12:54,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:12:54,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:12:54,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:12:54,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-12 00:12:54,147 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:12:54,150 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:12:54,395 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:12:54,436 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:12:54,436 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 00:12:54,439 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:12:54 BoogieIcfgContainer [2023-11-12 00:12:54,440 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:12:54,443 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:12:54,443 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:12:54,447 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:12:54,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:12:53" (1/3) ... [2023-11-12 00:12:54,449 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1204516f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:12:54, skipping insertion in model container [2023-11-12 00:12:54,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:12:53" (2/3) ... [2023-11-12 00:12:54,450 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1204516f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:12:54, skipping insertion in model container [2023-11-12 00:12:54,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:12:54" (3/3) ... [2023-11-12 00:12:54,452 INFO L112 eAbstractionObserver]: Analyzing ICFG heavy-1.c [2023-11-12 00:12:54,474 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:12:54,475 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:12:54,530 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:12:54,537 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;@255e53ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:12:54,538 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:12:54,542 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:12:54,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 00:12:54,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:54,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 00:12:54,550 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:54,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:54,556 INFO L85 PathProgramCache]: Analyzing trace with hash 2496104, now seen corresponding path program 1 times [2023-11-12 00:12:54,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:54,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216866475] [2023-11-12 00:12:54,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:54,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:54,903 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 00:12:54,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:54,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216866475] [2023-11-12 00:12:54,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216866475] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:54,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:12:54,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:12:54,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637352106] [2023-11-12 00:12:54,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:54,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:12:54,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:54,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:12:54,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:12:54,971 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 00:12:55,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:55,056 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2023-11-12 00:12:55,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:12:55,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2023-11-12 00:12:55,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:55,068 INFO L225 Difference]: With dead ends: 17 [2023-11-12 00:12:55,068 INFO L226 Difference]: Without dead ends: 10 [2023-11-12 00:12:55,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:12:55,075 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:55,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:12:55,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-12 00:12:55,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2023-11-12 00:12:55,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.4285714285714286) 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 00:12:55,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2023-11-12 00:12:55,113 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 4 [2023-11-12 00:12:55,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:55,113 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2023-11-12 00:12:55,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 00:12:55,114 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2023-11-12 00:12:55,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:12:55,115 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:55,115 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 00:12:55,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:12:55,116 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:55,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:55,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1936420166, now seen corresponding path program 1 times [2023-11-12 00:12:55,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:55,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950553950] [2023-11-12 00:12:55,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:55,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:55,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:55,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950553950] [2023-11-12 00:12:55,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950553950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:55,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:12:55,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:12:55,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834548748] [2023-11-12 00:12:55,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:55,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:12:55,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:55,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:12:55,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:12:55,271 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) 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 00:12:55,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:55,308 INFO L93 Difference]: Finished difference Result 16 states and 22 transitions. [2023-11-12 00:12:55,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:12:55,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) 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 6 [2023-11-12 00:12:55,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:55,310 INFO L225 Difference]: With dead ends: 16 [2023-11-12 00:12:55,310 INFO L226 Difference]: Without dead ends: 10 [2023-11-12 00:12:55,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:12:55,314 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:55,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:12:55,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-12 00:12:55,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2023-11-12 00:12:55,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:12:55,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2023-11-12 00:12:55,323 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2023-11-12 00:12:55,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:55,324 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2023-11-12 00:12:55,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) 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 00:12:55,325 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2023-11-12 00:12:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:12:55,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:55,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:55,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:12:55,327 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:55,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:55,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2032239394, now seen corresponding path program 1 times [2023-11-12 00:12:55,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:55,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360212069] [2023-11-12 00:12:55,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:55,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:55,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:55,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:55,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360212069] [2023-11-12 00:12:55,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360212069] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:12:55,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:12:55,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:12:55,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362201767] [2023-11-12 00:12:55,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:12:55,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:12:55,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:12:55,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:12:55,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:12:55,441 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 00:12:55,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:12:55,464 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2023-11-12 00:12:55,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:12:55,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-12 00:12:55,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:12:55,466 INFO L225 Difference]: With dead ends: 17 [2023-11-12 00:12:55,466 INFO L226 Difference]: Without dead ends: 10 [2023-11-12 00:12:55,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:12:55,468 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:12:55,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:12:55,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-12 00:12:55,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-12 00:12:55,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:12:55,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2023-11-12 00:12:55,472 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 8 [2023-11-12 00:12:55,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:12:55,472 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2023-11-12 00:12:55,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 00:12:55,473 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2023-11-12 00:12:55,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 00:12:55,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:12:55,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:12:55,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:12:55,474 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:12:55,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:12:55,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1594945054, now seen corresponding path program 1 times [2023-11-12 00:12:55,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:12:55,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367605958] [2023-11-12 00:12:55,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:55,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:12:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:12:55,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:12:55,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367605958] [2023-11-12 00:12:55,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367605958] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:12:55,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932318069] [2023-11-12 00:12:55,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:12:55,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:12:55,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:12:55,604 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:12:55,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:12:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:12:55,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:12:55,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:12:55,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:12:55,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:12:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:12:55,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932318069] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:12:55,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1560143572] [2023-11-12 00:12:55,782 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:12:55,782 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:12:55,786 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:12:55,792 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:12:55,792 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:12:59,899 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:13:00,309 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '194#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1| 1) (<= 1048576 (mod |ULTIMATE.start_main_~i~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |~#array~0.offset| 0) (= 4 |~#array~0.base|))' at error location [2023-11-12 00:13:00,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:13:00,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:13:00,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-11-12 00:13:00,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601257736] [2023-11-12 00:13:00,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:13:00,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:13:00,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:00,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:13:00,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:13:00,324 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:13:00,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:00,609 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2023-11-12 00:13:00,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 00:13:00,611 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-12 00:13:00,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:00,612 INFO L225 Difference]: With dead ends: 37 [2023-11-12 00:13:00,613 INFO L226 Difference]: Without dead ends: 29 [2023-11-12 00:13:00,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2023-11-12 00:13:00,614 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 24 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:00,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 15 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:13:00,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-12 00:13:00,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-12 00:13:00,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 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 00:13:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2023-11-12 00:13:00,627 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 9 [2023-11-12 00:13:00,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:00,627 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2023-11-12 00:13:00,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:13:00,628 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2023-11-12 00:13:00,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-12 00:13:00,629 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:00,629 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 4, 4, 4, 1, 1, 1, 1] [2023-11-12 00:13:00,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:00,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:00,830 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:13:00,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:00,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1475480496, now seen corresponding path program 2 times [2023-11-12 00:13:00,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:00,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895232794] [2023-11-12 00:13:00,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:00,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 38 proven. 3 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-12 00:13:01,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:01,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895232794] [2023-11-12 00:13:01,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895232794] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:13:01,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799589214] [2023-11-12 00:13:01,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:13:01,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:01,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:01,227 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:01,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:13:01,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-12 00:13:01,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:13:01,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 00:13:01,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-12 00:13:01,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:13:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 38 proven. 3 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-12 00:13:01,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799589214] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:13:01,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1020048036] [2023-11-12 00:13:01,510 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:13:01,510 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:13:01,510 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:13:01,511 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:13:01,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:13:03,571 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:13:03,770 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '509#(and (not (= (mod |ULTIMATE.start_main_~a~0#1| 4294967296) 0)) (<= 1048576 (mod |ULTIMATE.start_main_~i~0#1| 4294967296)))' at error location [2023-11-12 00:13:03,771 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:13:03,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:13:03,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-12 00:13:03,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386059594] [2023-11-12 00:13:03,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:13:03,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:13:03,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:03,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:13:03,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:13:03,778 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 00:13:03,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:03,938 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2023-11-12 00:13:03,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:13:03,939 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 28 [2023-11-12 00:13:03,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:03,940 INFO L225 Difference]: With dead ends: 71 [2023-11-12 00:13:03,940 INFO L226 Difference]: Without dead ends: 45 [2023-11-12 00:13:03,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-11-12 00:13:03,942 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:03,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:13:03,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-12 00:13:03,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-12 00:13:03,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 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 00:13:03,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2023-11-12 00:13:03,955 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 28 [2023-11-12 00:13:03,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:03,956 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2023-11-12 00:13:03,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 00:13:03,956 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2023-11-12 00:13:03,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 00:13:03,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:03,958 INFO L195 NwaCegarLoop]: trace histogram [24, 4, 4, 4, 4, 1, 1, 1, 1] [2023-11-12 00:13:03,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:04,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:04,165 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:13:04,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:04,166 INFO L85 PathProgramCache]: Analyzing trace with hash 34186832, now seen corresponding path program 3 times [2023-11-12 00:13:04,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:04,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786970070] [2023-11-12 00:13:04,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:04,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 158 proven. 21 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2023-11-12 00:13:04,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:04,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786970070] [2023-11-12 00:13:04,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786970070] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:13:04,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660325419] [2023-11-12 00:13:04,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:13:04,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:04,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:04,870 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:04,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:13:05,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:13:05,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:13:05,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 00:13:05,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 348 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-12 00:13:05,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:13:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 10 proven. 338 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-12 00:13:05,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660325419] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:13:05,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [977603940] [2023-11-12 00:13:05,785 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:13:05,785 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:13:05,785 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:13:05,786 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:13:05,786 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:13:07,307 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:13:07,750 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1025#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1| 1) (<= 1048576 (mod |ULTIMATE.start_main_~i~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |~#array~0.offset| 0) (= 4 |~#array~0.base|))' at error location [2023-11-12 00:13:07,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:13:07,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:13:07,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 29 [2023-11-12 00:13:07,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109662036] [2023-11-12 00:13:07,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:13:07,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-12 00:13:07,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:07,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-12 00:13:07,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2023-11-12 00:13:07,754 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 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 00:13:13,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:13:13,904 INFO L93 Difference]: Finished difference Result 157 states and 201 transitions. [2023-11-12 00:13:13,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-11-12 00:13:13,904 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 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 44 [2023-11-12 00:13:13,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:13:13,906 INFO L225 Difference]: With dead ends: 157 [2023-11-12 00:13:13,907 INFO L226 Difference]: Without dead ends: 115 [2023-11-12 00:13:13,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3683 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1917, Invalid=9213, Unknown=0, NotChecked=0, Total=11130 [2023-11-12 00:13:13,914 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 70 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:13:13,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 67 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-12 00:13:13,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-12 00:13:13,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2023-11-12 00:13:13,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1842105263157894) internal successors, (135), 114 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:13:13,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2023-11-12 00:13:13,944 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 44 [2023-11-12 00:13:13,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:13:13,944 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2023-11-12 00:13:13,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 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 00:13:13,945 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2023-11-12 00:13:13,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-12 00:13:13,949 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:13:13,950 INFO L195 NwaCegarLoop]: trace histogram [70, 10, 10, 10, 10, 1, 1, 1, 1] [2023-11-12 00:13:13,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:13:14,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:14,161 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:13:14,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:13:14,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1777706280, now seen corresponding path program 4 times [2023-11-12 00:13:14,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:13:14,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852661640] [2023-11-12 00:13:14,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:13:14,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:13:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3405 backedges. 605 proven. 28 refuted. 0 times theorem prover too weak. 2772 trivial. 0 not checked. [2023-11-12 00:13:16,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:13:16,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852661640] [2023-11-12 00:13:16,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852661640] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:13:16,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288656526] [2023-11-12 00:13:16,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:13:16,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:13:16,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:13:16,098 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:13:16,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_856533c7-009d-4269-9d82-c3d9b0d737db/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:13:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:13:16,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-12 00:13:16,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:13:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3405 backedges. 605 proven. 28 refuted. 0 times theorem prover too weak. 2772 trivial. 0 not checked. [2023-11-12 00:13:16,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:13:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3405 backedges. 1472 proven. 1465 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2023-11-12 00:13:17,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288656526] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:13:17,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1388667018] [2023-11-12 00:13:17,481 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:13:17,482 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:13:17,482 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:13:17,482 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:13:17,483 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:13:20,670 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:13:21,131 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2425#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1| 1) (<= 1048576 (mod |ULTIMATE.start_main_~i~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |~#array~0.offset| 0) (= 4 |~#array~0.base|))' at error location [2023-11-12 00:13:21,131 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:13:21,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:13:21,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 18] total 35 [2023-11-12 00:13:21,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140015618] [2023-11-12 00:13:21,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:13:21,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-12 00:13:21,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:13:21,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-12 00:13:21,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2023-11-12 00:13:21,135 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 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)