./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/underapprox_1-2.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_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/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_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/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_a41e6a47-aadc-40f0-afa9-55718b2c0a86/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 3627a732530e36fdf7a132fca7d3f33785550e6f2e2a95fdbae864743bbd37d1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:45:02,142 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:45:02,275 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:45:02,282 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:45:02,283 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:45:02,327 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:45:02,328 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:45:02,329 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:45:02,330 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:45:02,335 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:45:02,335 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:45:02,337 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:45:02,337 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:45:02,339 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:45:02,339 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:45:02,340 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:45:02,340 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:45:02,341 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:45:02,341 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:45:02,342 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:45:02,342 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:45:02,343 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:45:02,344 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:45:02,345 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:45:02,345 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:45:02,346 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:45:02,346 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:45:02,346 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:45:02,347 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:45:02,347 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:45:02,349 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:45:02,349 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:45:02,349 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:45:02,350 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:45:02,350 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:45:02,350 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:45:02,351 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:45:02,351 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:45:02,351 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:45:02,352 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:45:02,352 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:45:02,352 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:45:02,353 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:45:02,353 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:45:02,354 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:45:02,354 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_a41e6a47-aadc-40f0-afa9-55718b2c0a86/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3627a732530e36fdf7a132fca7d3f33785550e6f2e2a95fdbae864743bbd37d1 [2023-11-12 00:45:02,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:45:02,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:45:02,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:45:02,750 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:45:02,751 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:45:02,753 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/loop-acceleration/underapprox_1-2.c [2023-11-12 00:45:05,856 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:45:06,100 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:45:06,101 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/sv-benchmarks/c/loop-acceleration/underapprox_1-2.c [2023-11-12 00:45:06,110 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/data/fb31d5a7d/6e6b2b0ec9454fc3ab54e00cdf00b402/FLAGdcdd4e82f [2023-11-12 00:45:06,126 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/data/fb31d5a7d/6e6b2b0ec9454fc3ab54e00cdf00b402 [2023-11-12 00:45:06,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:45:06,130 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:45:06,132 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:45:06,132 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:45:06,137 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:45:06,137 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:45:06" (1/1) ... [2023-11-12 00:45:06,139 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52c6919a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:06, skipping insertion in model container [2023-11-12 00:45:06,139 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:45:06" (1/1) ... [2023-11-12 00:45:06,160 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:45:06,313 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_a41e6a47-aadc-40f0-afa9-55718b2c0a86/sv-benchmarks/c/loop-acceleration/underapprox_1-2.c[327,340] [2023-11-12 00:45:06,326 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:45:06,335 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:45:06,348 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_a41e6a47-aadc-40f0-afa9-55718b2c0a86/sv-benchmarks/c/loop-acceleration/underapprox_1-2.c[327,340] [2023-11-12 00:45:06,351 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:45:06,365 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:45:06,366 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:06 WrapperNode [2023-11-12 00:45:06,366 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:45:06,367 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:45:06,368 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:45:06,368 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:45:06,376 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:06" (1/1) ... [2023-11-12 00:45:06,382 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:06" (1/1) ... [2023-11-12 00:45:06,397 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2023-11-12 00:45:06,398 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:45:06,398 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:45:06,398 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:45:06,399 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:45:06,408 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:06" (1/1) ... [2023-11-12 00:45:06,408 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:06" (1/1) ... [2023-11-12 00:45:06,409 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:06" (1/1) ... [2023-11-12 00:45:06,410 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:06" (1/1) ... [2023-11-12 00:45:06,412 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:06" (1/1) ... [2023-11-12 00:45:06,415 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:06" (1/1) ... [2023-11-12 00:45:06,416 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:06" (1/1) ... [2023-11-12 00:45:06,417 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:06" (1/1) ... [2023-11-12 00:45:06,418 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:45:06,419 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:45:06,420 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:45:06,420 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:45:06,421 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:06" (1/1) ... [2023-11-12 00:45:06,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:45:06,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:06,457 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:45:06,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:45:06,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:45:06,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:45:06,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:45:06,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:45:06,578 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:45:06,582 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:45:06,742 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:45:06,771 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:45:06,772 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:45:06,775 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:45:06 BoogieIcfgContainer [2023-11-12 00:45:06,775 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:45:06,778 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:45:06,778 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:45:06,782 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:45:06,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:45:06" (1/3) ... [2023-11-12 00:45:06,783 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@564db3eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:45:06, skipping insertion in model container [2023-11-12 00:45:06,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:06" (2/3) ... [2023-11-12 00:45:06,783 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@564db3eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:45:06, skipping insertion in model container [2023-11-12 00:45:06,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:45:06" (3/3) ... [2023-11-12 00:45:06,785 INFO L112 eAbstractionObserver]: Analyzing ICFG underapprox_1-2.c [2023-11-12 00:45:06,808 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:45:06,808 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:45:06,864 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:45:06,873 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;@220bb856, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:45:06,873 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:45:06,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 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 00:45:06,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 00:45:06,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:06,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 00:45:06,887 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:06,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:06,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1850503, now seen corresponding path program 1 times [2023-11-12 00:45:06,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:06,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515561805] [2023-11-12 00:45:06,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:06,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:07,237 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 00:45:07,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:07,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515561805] [2023-11-12 00:45:07,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515561805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:07,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:45:07,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:45:07,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582104733] [2023-11-12 00:45:07,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:07,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:45:07,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:07,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:45:07,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:45:07,301 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 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) 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 00:45:07,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:07,343 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2023-11-12 00:45:07,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:45:07,346 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 00:45:07,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:07,354 INFO L225 Difference]: With dead ends: 13 [2023-11-12 00:45:07,355 INFO L226 Difference]: Without dead ends: 6 [2023-11-12 00:45:07,358 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 00:45:07,364 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:07,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:45:07,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2023-11-12 00:45:07,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2023-11-12 00:45:07,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 00:45:07,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2023-11-12 00:45:07,397 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2023-11-12 00:45:07,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:07,398 INFO L495 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2023-11-12 00:45:07,398 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 00:45:07,398 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2023-11-12 00:45:07,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:45:07,399 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:07,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:45:07,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:45:07,400 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:07,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:07,401 INFO L85 PathProgramCache]: Analyzing trace with hash 56695734, now seen corresponding path program 1 times [2023-11-12 00:45:07,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:07,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236251460] [2023-11-12 00:45:07,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:07,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:45:07,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:07,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236251460] [2023-11-12 00:45:07,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236251460] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:45:07,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761785532] [2023-11-12 00:45:07,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:07,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:07,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:07,566 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:07,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:45:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:07,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 00:45:07,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:45:07,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:45:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:45:07,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761785532] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:45:07,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1790951558] [2023-11-12 00:45:07,731 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2023-11-12 00:45:07,732 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:45:07,735 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:45:07,741 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:45:07,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:45:08,110 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:45:08,205 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '67#(and (= (mod (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 3) 0) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 6 (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-12 00:45:08,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:45:08,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:45:08,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 00:45:08,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562592288] [2023-11-12 00:45:08,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:45:08,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:45:08,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:08,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:45:08,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-12 00:45:08,212 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 00:45:08,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:08,270 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2023-11-12 00:45:08,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:45:08,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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) Word has length 5 [2023-11-12 00:45:08,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:08,271 INFO L225 Difference]: With dead ends: 12 [2023-11-12 00:45:08,272 INFO L226 Difference]: Without dead ends: 9 [2023-11-12 00:45:08,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:45:08,274 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:08,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:45:08,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-11-12 00:45:08,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-11-12 00:45:08,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:08,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2023-11-12 00:45:08,279 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2023-11-12 00:45:08,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:08,279 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2023-11-12 00:45:08,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 00:45:08,280 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2023-11-12 00:45:08,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:45:08,280 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:08,281 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2023-11-12 00:45:08,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:45:08,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:08,487 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:08,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:08,487 INFO L85 PathProgramCache]: Analyzing trace with hash 435294279, now seen corresponding path program 2 times [2023-11-12 00:45:08,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:08,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101670698] [2023-11-12 00:45:08,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:08,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:45:08,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:08,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101670698] [2023-11-12 00:45:08,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101670698] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:45:08,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628932953] [2023-11-12 00:45:08,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:45:08,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:08,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:08,734 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:08,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:45:08,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 00:45:08,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:45:08,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 00:45:08,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:45:08,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:45:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:45:08,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628932953] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:45:08,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [511040307] [2023-11-12 00:45:08,943 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2023-11-12 00:45:08,943 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:45:08,944 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:45:08,944 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:45:08,944 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:45:09,073 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:45:09,202 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '158#(and (= (mod (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 3) 0) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 6 (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-12 00:45:09,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:45:09,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:45:09,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-12 00:45:09,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541977774] [2023-11-12 00:45:09,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:45:09,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 00:45:09,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:09,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 00:45:09,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-11-12 00:45:09,209 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:09,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:09,293 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2023-11-12 00:45:09,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:45:09,293 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-12 00:45:09,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:09,294 INFO L225 Difference]: With dead ends: 14 [2023-11-12 00:45:09,294 INFO L226 Difference]: Without dead ends: 11 [2023-11-12 00:45:09,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-11-12 00:45:09,299 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:09,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:45:09,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-12 00:45:09,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-12 00:45:09,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 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 00:45:09,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2023-11-12 00:45:09,310 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2023-11-12 00:45:09,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:09,311 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2023-11-12 00:45:09,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:09,311 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2023-11-12 00:45:09,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 00:45:09,312 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:09,312 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2023-11-12 00:45:09,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 00:45:09,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:09,517 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:09,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:09,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1684538919, now seen corresponding path program 3 times [2023-11-12 00:45:09,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:09,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148326393] [2023-11-12 00:45:09,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:09,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:45:09,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:09,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148326393] [2023-11-12 00:45:09,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148326393] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:45:09,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318753641] [2023-11-12 00:45:09,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:45:09,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:09,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:09,918 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:09,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:45:09,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:45:09,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:45:09,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 00:45:09,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:45:10,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:45:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:45:10,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318753641] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:45:10,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2032421666] [2023-11-12 00:45:10,774 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2023-11-12 00:45:10,774 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:45:10,774 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:45:10,775 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:45:10,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:45:10,883 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:45:11,012 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '274#(and (= (mod (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 3) 0) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 6 (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-12 00:45:11,012 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:45:11,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:45:11,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-11-12 00:45:11,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479678756] [2023-11-12 00:45:11,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:45:11,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 00:45:11,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:11,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 00:45:11,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2023-11-12 00:45:11,015 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 20 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:13,213 WARN L854 $PredicateComparison]: unable to prove that (and (not (= (mod (* 2 (mod |c_ULTIMATE.start_main_~y~0#1| 134217728)) 3) 0)) (not (= (mod (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296) 3) 0)) (not (= (mod (mod |c_ULTIMATE.start_main_~y~0#1| 67108864) 3) 0)) (not (= (mod (* 2 (mod |c_ULTIMATE.start_main_~y~0#1| 536870912)) 3) 0)) (not (= (mod (* (mod |c_ULTIMATE.start_main_~y~0#1| 2147483648) 2) 3) 0)) (not (= (mod (mod |c_ULTIMATE.start_main_~y~0#1| 1073741824) 3) 0)) (not (= (mod (mod |c_ULTIMATE.start_main_~y~0#1| 268435456) 3) 0))) is different from false [2023-11-12 00:45:21,617 WARN L293 SmtUtils]: Spent 7.38s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-12 00:45:23,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:45:33,968 WARN L293 SmtUtils]: Spent 6.93s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-12 00:45:35,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 00:45:44,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:45:47,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-12 00:45:50,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:45:55,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:45:57,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:45:58,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:45:58,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:58,854 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2023-11-12 00:45:58,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 00:45:58,854 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-12 00:45:58,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:58,855 INFO L225 Difference]: With dead ends: 29 [2023-11-12 00:45:58,855 INFO L226 Difference]: Without dead ends: 19 [2023-11-12 00:45:58,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=279, Invalid=913, Unknown=2, NotChecked=66, Total=1260 [2023-11-12 00:45:58,857 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 7 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:58,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 21 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 109 Invalid, 7 Unknown, 31 Unchecked, 16.4s Time] [2023-11-12 00:45:58,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-12 00:45:58,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-12 00:45:58,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 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 00:45:58,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2023-11-12 00:45:58,873 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2023-11-12 00:45:58,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:58,873 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2023-11-12 00:45:58,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:45:58,874 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2023-11-12 00:45:58,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 00:45:58,875 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:58,879 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1] [2023-11-12 00:45:58,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:45:59,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:59,086 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:45:59,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:59,087 INFO L85 PathProgramCache]: Analyzing trace with hash 946875815, now seen corresponding path program 4 times [2023-11-12 00:45:59,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:59,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67786672] [2023-11-12 00:45:59,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:59,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:59,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 56 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-12 00:45:59,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:59,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67786672] [2023-11-12 00:45:59,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67786672] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:45:59,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320535706] [2023-11-12 00:45:59,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:45:59,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:45:59,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:59,318 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:45:59,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:45:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:59,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 00:45:59,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:45:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:45:59,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:45:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:45:59,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320535706] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:45:59,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1083487730] [2023-11-12 00:45:59,758 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2023-11-12 00:45:59,758 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:45:59,759 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:45:59,759 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:45:59,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:45:59,841 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:45:59,961 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '506#(and (= (mod (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 3) 0) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 6 (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-12 00:45:59,962 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:45:59,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:45:59,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 22 [2023-11-12 00:45:59,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828025490] [2023-11-12 00:45:59,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:45:59,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-12 00:45:59,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:59,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-12 00:45:59,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2023-11-12 00:45:59,964 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 22 states have internal predecessors, (28), 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 00:46:00,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:00,017 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2023-11-12 00:46:00,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:46:00,018 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-12 00:46:00,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:00,018 INFO L225 Difference]: With dead ends: 19 [2023-11-12 00:46:00,018 INFO L226 Difference]: Without dead ends: 0 [2023-11-12 00:46:00,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2023-11-12 00:46:00,020 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:00,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:46:00,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-12 00:46:00,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-12 00:46:00,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 00:46:00,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-12 00:46:00,021 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2023-11-12 00:46:00,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:00,021 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-12 00:46:00,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 22 states have internal predecessors, (28), 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 00:46:00,022 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-12 00:46:00,022 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-12 00:46:00,024 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-12 00:46:00,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:00,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:00,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-12 00:46:00,388 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-12 00:46:00,389 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-12 00:46:00,389 INFO L899 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2023-11-12 00:46:00,389 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2023-11-12 00:46:00,389 INFO L895 garLoopResultBuilder]: At program point L16-2(lines 16 19) the Hoare annotation is: (let ((.cse0 (+ (* 2 |ULTIMATE.start_main_~y~0#1|) 1)) (.cse1 (* 715827883 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (* |ULTIMATE.start_main_~y~0#1| 178956971)) (.cse3 (+ |ULTIMATE.start_main_~y~0#1| 1))) (or (and (<= .cse0 (* (div (+ .cse1 357913936) 1073741824) 3)) (<= |ULTIMATE.start_main_~y~0#1| 16) (= |ULTIMATE.start_main_~x~0#1| 4)) (and (= 2 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 4) (<= .cse0 (* 3 (div (+ 89478484 .cse2) 268435456)))) (and (= 5 |ULTIMATE.start_main_~x~0#1|) (<= .cse3 (* 3 (div (+ .cse1 715827872) 2147483648))) (<= |ULTIMATE.start_main_~y~0#1| 32)) (and (= 3 |ULTIMATE.start_main_~x~0#1|) (<= .cse3 (* (div (+ .cse2 178956968) 536870912) 3)) (<= |ULTIMATE.start_main_~y~0#1| 8)) (and (<= |ULTIMATE.start_main_~y~0#1| 2) (= |ULTIMATE.start_main_~x~0#1| 1) (<= .cse3 (* (div (+ 44739242 (* 44739243 |ULTIMATE.start_main_~y~0#1|)) 134217728) 3))) (and (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start_main_~x~0#1| 0)) (let ((.cse4 (div |ULTIMATE.start_main_~y~0#1| 2))) (and (= (mod |ULTIMATE.start_main_~y~0#1| 2) 0) (<= (+ 1 .cse4) (* (div (+ (* 715827883 .cse4) 715827872) 2147483648) 3)) (<= .cse4 32) (= 6 |ULTIMATE.start_main_~x~0#1|))))) [2023-11-12 00:46:00,389 INFO L899 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2023-11-12 00:46:00,389 INFO L899 garLoopResultBuilder]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2023-11-12 00:46:00,393 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1] [2023-11-12 00:46:00,395 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-11-12 00:46:00,419 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 12:46:00 BoogieIcfgContainer [2023-11-12 00:46:00,419 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-12 00:46:00,420 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-12 00:46:00,420 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-12 00:46:00,420 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-12 00:46:00,421 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:45:06" (3/4) ... [2023-11-12 00:46:00,422 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-12 00:46:00,429 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2023-11-12 00:46:00,430 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2023-11-12 00:46:00,430 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-12 00:46:00,430 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-12 00:46:00,518 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/witness.graphml [2023-11-12 00:46:00,518 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/witness.yml [2023-11-12 00:46:00,518 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-12 00:46:00,519 INFO L158 Benchmark]: Toolchain (without parser) took 54388.76ms. Allocated memory was 148.9MB in the beginning and 180.4MB in the end (delta: 31.5MB). Free memory was 116.5MB in the beginning and 96.2MB in the end (delta: 20.3MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. [2023-11-12 00:46:00,519 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 115.3MB. Free memory is still 87.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 00:46:00,520 INFO L158 Benchmark]: CACSL2BoogieTranslator took 234.97ms. Allocated memory is still 148.9MB. Free memory was 116.5MB in the beginning and 106.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-12 00:46:00,520 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.43ms. Allocated memory is still 148.9MB. Free memory was 106.1MB in the beginning and 104.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 00:46:00,520 INFO L158 Benchmark]: Boogie Preprocessor took 20.32ms. Allocated memory is still 148.9MB. Free memory was 104.8MB in the beginning and 104.0MB in the end (delta: 798.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 00:46:00,521 INFO L158 Benchmark]: RCFGBuilder took 355.56ms. Allocated memory is still 148.9MB. Free memory was 104.0MB in the beginning and 113.9MB in the end (delta: -9.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-12 00:46:00,521 INFO L158 Benchmark]: TraceAbstraction took 53641.38ms. Allocated memory was 148.9MB in the beginning and 180.4MB in the end (delta: 31.5MB). Free memory was 113.1MB in the beginning and 100.4MB in the end (delta: 12.7MB). Peak memory consumption was 44.9MB. Max. memory is 16.1GB. [2023-11-12 00:46:00,521 INFO L158 Benchmark]: Witness Printer took 98.62ms. Allocated memory is still 180.4MB. Free memory was 100.4MB in the beginning and 96.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-12 00:46:00,523 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 115.3MB. Free memory is still 87.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 234.97ms. Allocated memory is still 148.9MB. Free memory was 116.5MB in the beginning and 106.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.43ms. Allocated memory is still 148.9MB. Free memory was 106.1MB in the beginning and 104.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 20.32ms. Allocated memory is still 148.9MB. Free memory was 104.8MB in the beginning and 104.0MB in the end (delta: 798.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 355.56ms. Allocated memory is still 148.9MB. Free memory was 104.0MB in the beginning and 113.9MB in the end (delta: -9.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 53641.38ms. Allocated memory was 148.9MB in the beginning and 180.4MB in the end (delta: 31.5MB). Free memory was 113.1MB in the beginning and 100.4MB in the end (delta: 12.7MB). Peak memory consumption was 44.9MB. Max. memory is 16.1GB. * Witness Printer took 98.62ms. Allocated memory is still 180.4MB. Free memory was 100.4MB in the beginning and 96.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 53.5s, OverallIterations: 5, TraceHistogramMax: 14, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 48.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7 mSolverCounterUnknown, 27 SdHoareTripleChecker+Valid, 16.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 27 mSDsluCounter, 51 SdHoareTripleChecker+Invalid, 16.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 31 IncrementalHoareTripleChecker+Unchecked, 42 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 235 IncrementalHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 9 mSDtfsCounter, 235 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 157 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 33.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=4, InterpolantAutomatonStates: 50, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 8 NumberOfFragments, 143 HoareAnnotationTreeSize, 1 FomulaSimplifications, 22 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 86 NumberOfCodeBlocks, 86 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 114 ConstructedInterpolants, 1 QuantifiedInterpolants, 618 SizeOfPredicates, 3 NumberOfNonLiveVariables, 257 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 204/411 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: (((((((((((2 * y) + 1) <= ((((715827883 * y) + 357913936) / 1073741824) * 3)) && (y <= 16)) && (x == 4)) || (((2 == x) && (y <= 4)) && (((2 * y) + 1) <= (3 * ((89478484 + (y * 178956971)) / 268435456))))) || (((5 == x) && ((y + 1) <= (3 * (((715827883 * y) + 715827872) / 2147483648)))) && (y <= 32))) || (((3 == x) && ((y + 1) <= ((((y * 178956971) + 178956968) / 536870912) * 3))) && (y <= 8))) || (((y <= 2) && (x == 1)) && ((y + 1) <= (((44739242 + (44739243 * y)) / 134217728) * 3)))) || ((y == 1) && (x == 0))) || (((((y % 2) == 0) && ((1 + (y / 2)) <= ((((715827883 * (y / 2)) + 715827872) / 2147483648) * 3))) && ((y / 2) <= 32)) && (6 == x))) RESULT: Ultimate proved your program to be correct! [2023-11-12 00:46:00,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a41e6a47-aadc-40f0-afa9-55718b2c0a86/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE