./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/divbin2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/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_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench/divbin2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/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_6d30a487-c034-4e5f-a767-ea4ffd1cca33/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 c7e3f11d23b462949b18ec2057853f57240b0651aa6fb66cf591585739df9d3e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:14:55,160 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:14:55,286 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:14:55,298 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:14:55,299 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:14:55,337 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:14:55,338 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:14:55,338 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:14:55,339 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:14:55,345 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:14:55,345 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:14:55,347 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:14:55,347 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:14:55,349 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:14:55,350 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:14:55,350 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:14:55,350 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:14:55,351 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:14:55,369 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:14:55,369 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:14:55,370 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:14:55,371 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:14:55,372 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:14:55,372 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:14:55,373 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:14:55,373 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:14:55,373 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:14:55,374 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:14:55,374 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:14:55,375 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:14:55,375 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:14:55,375 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:14:55,377 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:14:55,378 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:14:55,378 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:14:55,378 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:14:55,379 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:14:55,379 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:14:55,380 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:14:55,380 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:14:55,380 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:14:55,381 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:14:55,381 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:14:55,381 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:14:55,382 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:14:55,382 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_6d30a487-c034-4e5f-a767-ea4ffd1cca33/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7e3f11d23b462949b18ec2057853f57240b0651aa6fb66cf591585739df9d3e [2023-11-12 00:14:55,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:14:55,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:14:55,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:14:55,758 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:14:55,758 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:14:55,761 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/nla-digbench/divbin2.i [2023-11-12 00:14:58,962 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:14:59,174 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:14:59,175 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/sv-benchmarks/c/nla-digbench/divbin2.i [2023-11-12 00:14:59,188 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/data/dc4ffeb12/e69265e243d24ca3bf860a3e54ffa56e/FLAGed3d9cb1f [2023-11-12 00:14:59,201 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/data/dc4ffeb12/e69265e243d24ca3bf860a3e54ffa56e [2023-11-12 00:14:59,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:14:59,206 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:14:59,207 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:14:59,207 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:14:59,213 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:14:59,214 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:14:59" (1/1) ... [2023-11-12 00:14:59,215 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@99a1e1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:59, skipping insertion in model container [2023-11-12 00:14:59,215 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:14:59" (1/1) ... [2023-11-12 00:14:59,238 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:14:59,412 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_6d30a487-c034-4e5f-a767-ea4ffd1cca33/sv-benchmarks/c/nla-digbench/divbin2.i[951,964] [2023-11-12 00:14:59,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:14:59,436 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:14:59,449 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_6d30a487-c034-4e5f-a767-ea4ffd1cca33/sv-benchmarks/c/nla-digbench/divbin2.i[951,964] [2023-11-12 00:14:59,455 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:14:59,470 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:14:59,470 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:59 WrapperNode [2023-11-12 00:14:59,471 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:14:59,472 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:14:59,472 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:14:59,473 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:14:59,480 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:59" (1/1) ... [2023-11-12 00:14:59,487 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:59" (1/1) ... [2023-11-12 00:14:59,505 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2023-11-12 00:14:59,506 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:14:59,506 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:14:59,506 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:14:59,507 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:14:59,515 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:59" (1/1) ... [2023-11-12 00:14:59,516 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:59" (1/1) ... [2023-11-12 00:14:59,517 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:59" (1/1) ... [2023-11-12 00:14:59,517 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:59" (1/1) ... [2023-11-12 00:14:59,521 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:59" (1/1) ... [2023-11-12 00:14:59,524 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:59" (1/1) ... [2023-11-12 00:14:59,525 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:59" (1/1) ... [2023-11-12 00:14:59,526 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:59" (1/1) ... [2023-11-12 00:14:59,528 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:14:59,529 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:14:59,529 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:14:59,530 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:14:59,531 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:59" (1/1) ... [2023-11-12 00:14:59,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:14:59,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:59,574 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:14:59,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:14:59,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:14:59,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:14:59,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:14:59,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:14:59,620 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:14:59,620 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:14:59,690 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:14:59,693 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:14:59,839 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:14:59,881 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:14:59,881 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 00:14:59,883 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:14:59 BoogieIcfgContainer [2023-11-12 00:14:59,884 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:14:59,887 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:14:59,887 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:14:59,890 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:14:59,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:14:59" (1/3) ... [2023-11-12 00:14:59,892 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505c652c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:14:59, skipping insertion in model container [2023-11-12 00:14:59,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:59" (2/3) ... [2023-11-12 00:14:59,893 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505c652c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:14:59, skipping insertion in model container [2023-11-12 00:14:59,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:14:59" (3/3) ... [2023-11-12 00:14:59,894 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2.i [2023-11-12 00:14:59,914 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:14:59,915 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:14:59,965 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:14:59,972 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;@77c858cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:14:59,972 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:14:59,977 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:14:59,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:14:59,984 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:59,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:59,985 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:59,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:59,990 INFO L85 PathProgramCache]: Analyzing trace with hash 394474291, now seen corresponding path program 1 times [2023-11-12 00:14:59,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:59,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706119057] [2023-11-12 00:14:59,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:59,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:00,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:00,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706119057] [2023-11-12 00:15:00,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 00:15:00,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234042447] [2023-11-12 00:15:00,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:00,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:00,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:00,121 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:15:00,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:15:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:00,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 00:15:00,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:00,235 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 00:15:00,236 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:15:00,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234042447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:00,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:00,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:15:00,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525371689] [2023-11-12 00:15:00,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:00,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:15:00,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:00,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:15:00,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:15:00,303 INFO L87 Difference]: Start difference. First operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:15:00,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:00,361 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2023-11-12 00:15:00,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:15:00,364 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 00:15:00,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:00,373 INFO L225 Difference]: With dead ends: 27 [2023-11-12 00:15:00,373 INFO L226 Difference]: Without dead ends: 13 [2023-11-12 00:15:00,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:15:00,384 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:00,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:15:00,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-12 00:15:00,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-12 00:15:00,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:15:00,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-11-12 00:15:00,445 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2023-11-12 00:15:00,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:00,445 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-11-12 00:15:00,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:15:00,446 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-11-12 00:15:00,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:15:00,447 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:00,447 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:15:00,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:00,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:00,655 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:15:00,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:00,656 INFO L85 PathProgramCache]: Analyzing trace with hash -336588208, now seen corresponding path program 1 times [2023-11-12 00:15:00,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:00,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49001611] [2023-11-12 00:15:00,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:00,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:00,681 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:15:00,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099209912] [2023-11-12 00:15:00,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:00,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:00,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:00,686 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:15:00,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:15:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:00,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 00:15:00,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:00,932 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 00:15:00,933 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:15:00,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:00,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49001611] [2023-11-12 00:15:00,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:15:00,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099209912] [2023-11-12 00:15:00,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099209912] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:00,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:00,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:15:00,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237016052] [2023-11-12 00:15:00,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:00,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:15:00,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:00,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:15:00,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:15:00,938 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:15:01,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:01,030 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-11-12 00:15:01,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:15:01,031 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 00:15:01,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:01,032 INFO L225 Difference]: With dead ends: 25 [2023-11-12 00:15:01,032 INFO L226 Difference]: Without dead ends: 22 [2023-11-12 00:15:01,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:15:01,035 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:01,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 35 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:15:01,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-12 00:15:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-12 00:15:01,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:15:01,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-11-12 00:15:01,045 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 8 [2023-11-12 00:15:01,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:01,046 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-11-12 00:15:01,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:15:01,046 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-11-12 00:15:01,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 00:15:01,047 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:01,047 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:15:01,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:01,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:01,254 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:15:01,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:01,255 INFO L85 PathProgramCache]: Analyzing trace with hash -475727605, now seen corresponding path program 1 times [2023-11-12 00:15:01,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:01,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512992739] [2023-11-12 00:15:01,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:01,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:01,270 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:15:01,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74805849] [2023-11-12 00:15:01,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:01,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:01,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:01,273 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:15:01,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:15:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:01,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 00:15:01,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:15:01,443 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:15:01,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:01,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512992739] [2023-11-12 00:15:01,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:15:01,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74805849] [2023-11-12 00:15:01,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74805849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:01,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:01,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:15:01,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328256005] [2023-11-12 00:15:01,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:01,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:15:01,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:01,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:15:01,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:15:01,447 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:15:01,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:01,499 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2023-11-12 00:15:01,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:15:01,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-12 00:15:01,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:01,501 INFO L225 Difference]: With dead ends: 32 [2023-11-12 00:15:01,501 INFO L226 Difference]: Without dead ends: 29 [2023-11-12 00:15:01,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:15:01,503 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:01,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 30 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:15:01,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-12 00:15:01,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2023-11-12 00:15:01,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:15:01,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-11-12 00:15:01,512 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 10 [2023-11-12 00:15:01,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:01,513 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-11-12 00:15:01,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:15:01,513 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-11-12 00:15:01,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 00:15:01,514 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:01,514 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:15:01,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:01,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:01,720 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:15:01,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:01,721 INFO L85 PathProgramCache]: Analyzing trace with hash -610399175, now seen corresponding path program 1 times [2023-11-12 00:15:01,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:01,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510183435] [2023-11-12 00:15:01,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:01,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:01,733 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:15:01,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140020690] [2023-11-12 00:15:01,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:01,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:01,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:01,735 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:15:01,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:15:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:01,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 00:15:01,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:01,852 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:15:01,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:01,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510183435] [2023-11-12 00:15:01,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:15:01,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140020690] [2023-11-12 00:15:01,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140020690] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:01,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:01,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:15:01,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760261235] [2023-11-12 00:15:01,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:01,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:15:01,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:01,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:15:01,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:01,857 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:15:01,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:01,883 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2023-11-12 00:15:01,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:15:01,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-12 00:15:01,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:01,885 INFO L225 Difference]: With dead ends: 35 [2023-11-12 00:15:01,885 INFO L226 Difference]: Without dead ends: 22 [2023-11-12 00:15:01,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 00:15:01,887 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:01,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:15:01,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-12 00:15:01,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-12 00:15:01,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:15:01,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-11-12 00:15:01,895 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2023-11-12 00:15:01,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:01,895 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-11-12 00:15:01,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:15:01,896 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-11-12 00:15:01,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-12 00:15:01,897 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:01,897 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:15:01,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:02,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:02,103 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:15:02,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:02,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1053414114, now seen corresponding path program 1 times [2023-11-12 00:15:02,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:02,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659607814] [2023-11-12 00:15:02,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:02,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:02,115 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:15:02,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207046228] [2023-11-12 00:15:02,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:02,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:02,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:02,117 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:15:02,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:15:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:02,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 00:15:02,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:02,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:15:03,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:03,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:03,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659607814] [2023-11-12 00:15:03,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:15:03,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207046228] [2023-11-12 00:15:03,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207046228] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:15:03,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [998247107] [2023-11-12 00:15:03,250 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-12 00:15:03,250 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:15:03,254 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:15:03,259 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:15:03,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:15:04,195 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2023-11-12 00:15:04,225 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:15:08,633 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '530#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_15| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_14| Int)) (not (= (mod (+ |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_14| (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_15| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_14|)) 4294967296) (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_14| 4294967296)))))' at error location [2023-11-12 00:15:08,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:15:08,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:15:08,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-12 00:15:08,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301946455] [2023-11-12 00:15:08,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:15:08,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 00:15:08,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:08,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 00:15:08,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=389, Unknown=1, NotChecked=0, Total=462 [2023-11-12 00:15:08,636 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:15:23,284 WARN L293 SmtUtils]: Spent 14.14s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-12 00:15:25,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-12 00:15:30,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-12 00:15:33,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-12 00:15:35,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-12 00:15:37,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-12 00:15:39,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-12 00:15:44,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:44,926 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2023-11-12 00:15:44,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 00:15:44,927 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-11-12 00:15:44,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:44,928 INFO L225 Difference]: With dead ends: 63 [2023-11-12 00:15:44,929 INFO L226 Difference]: Without dead ends: 45 [2023-11-12 00:15:44,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=116, Invalid=585, Unknown=1, NotChecked=0, Total=702 [2023-11-12 00:15:44,930 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 19 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:44,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 78 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 89 Invalid, 5 Unknown, 0 Unchecked, 15.9s Time] [2023-11-12 00:15:44,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-12 00:15:44,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2023-11-12 00:15:44,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.15625) internal successors, (37), 35 states have internal predecessors, (37), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 00:15:44,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2023-11-12 00:15:44,960 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 17 [2023-11-12 00:15:44,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:44,960 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2023-11-12 00:15:44,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:15:44,961 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2023-11-12 00:15:44,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-12 00:15:44,964 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:44,964 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:15:44,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:45,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:45,165 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:15:45,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:45,165 INFO L85 PathProgramCache]: Analyzing trace with hash 929034317, now seen corresponding path program 2 times [2023-11-12 00:15:45,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:45,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468910270] [2023-11-12 00:15:45,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:45,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:45,182 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:15:45,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057295271] [2023-11-12 00:15:45,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:15:45,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:45,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:45,184 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:15:45,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d30a487-c034-4e5f-a767-ea4ffd1cca33/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:15:45,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:15:45,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:15:45,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-12 00:15:45,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:15:46,657 INFO L327 TraceCheckSpWp]: Computing backward predicates...