./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/nsqm-if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/nsqm-if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ --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 8d7989c0f7330a23b935c06e29a235b3d1d683ab2aa8325b4804307d493787f2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:17:09,163 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:17:09,275 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:17:09,282 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:17:09,283 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:17:09,314 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:17:09,315 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:17:09,316 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:17:09,317 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:17:09,317 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:17:09,318 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:17:09,319 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:17:09,319 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:17:09,320 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:17:09,320 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:17:09,321 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:17:09,322 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:17:09,322 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:17:09,323 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:17:09,323 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:17:09,325 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:17:09,326 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:17:09,327 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:17:09,327 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:17:09,328 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:17:09,328 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:17:09,329 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:17:09,329 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:17:09,330 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:17:09,330 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:17:09,330 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:17:09,331 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:17:09,331 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:17:09,332 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:17:09,332 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:17:09,332 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:17:09,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:17:09,333 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:17:09,333 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:17:09,333 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:17:09,334 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:17:09,334 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:17:09,334 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:17:09,335 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:17:09,335 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:17:09,335 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_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d7989c0f7330a23b935c06e29a235b3d1d683ab2aa8325b4804307d493787f2 [2023-11-19 05:17:09,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:17:09,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:17:09,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:17:09,694 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:17:09,695 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:17:09,698 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/array-fpi/nsqm-if.c [2023-11-19 05:17:13,009 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:17:13,231 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:17:13,231 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/sv-benchmarks/c/array-fpi/nsqm-if.c [2023-11-19 05:17:13,240 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/data/bc2b92d26/786886407c4b4845a5acd1d26ce7edd1/FLAGe2ebb5369 [2023-11-19 05:17:13,257 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/data/bc2b92d26/786886407c4b4845a5acd1d26ce7edd1 [2023-11-19 05:17:13,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:17:13,263 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:17:13,264 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:17:13,265 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:17:13,271 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:17:13,272 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:17:13" (1/1) ... [2023-11-19 05:17:13,273 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1935a332 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:13, skipping insertion in model container [2023-11-19 05:17:13,274 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:17:13" (1/1) ... [2023-11-19 05:17:13,300 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:17:13,458 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_db1f0517-753c-4e8e-80bc-6774763ba281/sv-benchmarks/c/array-fpi/nsqm-if.c[590,603] [2023-11-19 05:17:13,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:17:13,494 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:17:13,509 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_db1f0517-753c-4e8e-80bc-6774763ba281/sv-benchmarks/c/array-fpi/nsqm-if.c[590,603] [2023-11-19 05:17:13,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:17:13,537 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:17:13,538 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:13 WrapperNode [2023-11-19 05:17:13,538 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:17:13,540 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:17:13,540 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:17:13,540 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:17:13,549 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:13" (1/1) ... [2023-11-19 05:17:13,566 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:13" (1/1) ... [2023-11-19 05:17:13,591 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-11-19 05:17:13,591 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:17:13,592 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:17:13,592 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:17:13,593 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:17:13,603 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:13" (1/1) ... [2023-11-19 05:17:13,604 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:13" (1/1) ... [2023-11-19 05:17:13,606 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:13" (1/1) ... [2023-11-19 05:17:13,607 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:13" (1/1) ... [2023-11-19 05:17:13,614 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:13" (1/1) ... [2023-11-19 05:17:13,625 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:13" (1/1) ... [2023-11-19 05:17:13,626 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:13" (1/1) ... [2023-11-19 05:17:13,628 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:13" (1/1) ... [2023-11-19 05:17:13,630 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:17:13,631 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:17:13,631 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:17:13,632 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:17:13,632 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:13" (1/1) ... [2023-11-19 05:17:13,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:17:13,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:13,674 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:17:13,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:17:13,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:17:13,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:17:13,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:17:13,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:17:13,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:17:13,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:17:13,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:17:13,836 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:17:13,841 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:17:14,130 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:17:14,281 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:17:14,281 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 05:17:14,286 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:17:14 BoogieIcfgContainer [2023-11-19 05:17:14,287 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:17:14,290 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:17:14,290 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:17:14,304 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:17:14,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:17:13" (1/3) ... [2023-11-19 05:17:14,305 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a26469d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:17:14, skipping insertion in model container [2023-11-19 05:17:14,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:13" (2/3) ... [2023-11-19 05:17:14,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a26469d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:17:14, skipping insertion in model container [2023-11-19 05:17:14,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:17:14" (3/3) ... [2023-11-19 05:17:14,309 INFO L112 eAbstractionObserver]: Analyzing ICFG nsqm-if.c [2023-11-19 05:17:14,333 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:17:14,335 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:17:14,403 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:17:14,412 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;@3f4a1a3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:17:14,412 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:17:14,417 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 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) [2023-11-19 05:17:14,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 05:17:14,429 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:14,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:14,431 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:14,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:14,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1095923036, now seen corresponding path program 1 times [2023-11-19 05:17:14,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:14,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550324567] [2023-11-19 05:17:14,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:14,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:14,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:14,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550324567] [2023-11-19 05:17:14,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 05:17:14,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254197569] [2023-11-19 05:17:14,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:14,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:14,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:14,702 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:14,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:17:14,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:14,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:17:14,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:14,880 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:17:14,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254197569] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:14,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:14,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:17:14,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36492107] [2023-11-19 05:17:14,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:14,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:17:14,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:14,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:17:14,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:17:14,926 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 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 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-11-19 05:17:14,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:14,986 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2023-11-19 05:17:14,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:17:14,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2023-11-19 05:17:14,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:14,998 INFO L225 Difference]: With dead ends: 20 [2023-11-19 05:17:14,999 INFO L226 Difference]: Without dead ends: 10 [2023-11-19 05:17:15,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:17:15,007 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:15,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:17:15,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-19 05:17:15,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-19 05:17:15,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:15,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2023-11-19 05:17:15,041 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2023-11-19 05:17:15,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:15,042 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2023-11-19 05:17:15,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-11-19 05:17:15,042 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2023-11-19 05:17:15,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 05:17:15,043 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:15,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:15,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 05:17:15,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 05:17:15,245 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:15,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:15,245 INFO L85 PathProgramCache]: Analyzing trace with hash 255696374, now seen corresponding path program 1 times [2023-11-19 05:17:15,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:15,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61601831] [2023-11-19 05:17:15,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:15,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:15,300 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:17:15,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499309692] [2023-11-19 05:17:15,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:15,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:15,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:15,308 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:15,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:17:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:15,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:17:15,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:17:15,456 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:17:15,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:15,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61601831] [2023-11-19 05:17:15,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:17:15,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499309692] [2023-11-19 05:17:15,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499309692] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:15,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:15,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:17:15,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284157951] [2023-11-19 05:17:15,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:15,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:17:15,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:15,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:17:15,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:17:15,467 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2023-11-19 05:17:15,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:15,520 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2023-11-19 05:17:15,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:17:15,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-19 05:17:15,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:15,522 INFO L225 Difference]: With dead ends: 21 [2023-11-19 05:17:15,523 INFO L226 Difference]: Without dead ends: 16 [2023-11-19 05:17:15,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:17:15,527 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:15,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 6 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:17:15,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-19 05:17:15,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2023-11-19 05:17:15,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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) [2023-11-19 05:17:15,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-11-19 05:17:15,537 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2023-11-19 05:17:15,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:15,537 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-11-19 05:17:15,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2023-11-19 05:17:15,538 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-11-19 05:17:15,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 05:17:15,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:15,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:15,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:17:15,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:15,740 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:15,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:15,741 INFO L85 PathProgramCache]: Analyzing trace with hash -652476163, now seen corresponding path program 1 times [2023-11-19 05:17:15,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:15,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490597988] [2023-11-19 05:17:15,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:15,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:15,817 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:17:15,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174086646] [2023-11-19 05:17:15,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:15,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:15,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:15,830 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:15,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:17:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:15,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 05:17:15,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:15,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-19 05:17:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:17:16,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:17:16,370 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:17:16,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 53 [2023-11-19 05:17:16,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-19 05:17:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:17:16,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:16,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490597988] [2023-11-19 05:17:16,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:17:16,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174086646] [2023-11-19 05:17:16,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174086646] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:17:16,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2016299380] [2023-11-19 05:17:16,466 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-19 05:17:16,466 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:17:16,471 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:17:16,478 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:17:16,479 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:17:17,495 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:17:17,690 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '199#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) 0) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (not (= (+ ~N~0 1) |ULTIMATE.start_main_#t~mem13#1|)))' at error location [2023-11-19 05:17:17,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:17:17,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:17:17,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-11-19 05:17:17,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943046696] [2023-11-19 05:17:17,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 05:17:17,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:17:17,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:17,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:17:17,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-19 05:17:17,694 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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) [2023-11-19 05:17:17,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:17,892 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2023-11-19 05:17:17,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:17:17,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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) Word has length 9 [2023-11-19 05:17:17,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:17,894 INFO L225 Difference]: With dead ends: 27 [2023-11-19 05:17:17,894 INFO L226 Difference]: Without dead ends: 25 [2023-11-19 05:17:17,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-19 05:17:17,896 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:17,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 18 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:17:17,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-19 05:17:17,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 14. [2023-11-19 05:17:17,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:17,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2023-11-19 05:17:17,903 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2023-11-19 05:17:17,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:17,904 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2023-11-19 05:17:17,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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) [2023-11-19 05:17:17,904 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2023-11-19 05:17:17,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 05:17:17,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:17,905 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:17,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-19 05:17:18,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:18,127 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:18,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:18,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1258946262, now seen corresponding path program 2 times [2023-11-19 05:17:18,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:18,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770577261] [2023-11-19 05:17:18,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:18,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:18,196 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:17:18,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749055298] [2023-11-19 05:17:18,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:17:18,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:18,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:18,199 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:18,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:17:18,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 05:17:18,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:17:18,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:17:18,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:18,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:17:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:18,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:18,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770577261] [2023-11-19 05:17:18,377 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:17:18,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749055298] [2023-11-19 05:17:18,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749055298] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:17:18,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [572127565] [2023-11-19 05:17:18,381 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-19 05:17:18,381 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:17:18,382 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:17:18,382 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:17:18,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:17:18,971 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:17:19,154 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '326#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (not (= (+ ~N~0 1) |ULTIMATE.start_main_#t~mem13#1|)))' at error location [2023-11-19 05:17:19,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:17:19,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:17:19,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-19 05:17:19,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654341922] [2023-11-19 05:17:19,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 05:17:19,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:17:19,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:19,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:17:19,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-19 05:17:19,157 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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) [2023-11-19 05:17:19,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:19,248 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2023-11-19 05:17:19,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:17:19,249 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 [2023-11-19 05:17:19,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:19,250 INFO L225 Difference]: With dead ends: 35 [2023-11-19 05:17:19,250 INFO L226 Difference]: Without dead ends: 23 [2023-11-19 05:17:19,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-11-19 05:17:19,252 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:19,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 13 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:17:19,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-19 05:17:19,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 13. [2023-11-19 05:17:19,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2023-11-19 05:17:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-11-19 05:17:19,257 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2023-11-19 05:17:19,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:19,258 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-11-19 05:17:19,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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) [2023-11-19 05:17:19,258 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-11-19 05:17:19,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 05:17:19,259 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:19,259 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:19,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:17:19,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:19,480 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:19,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:19,480 INFO L85 PathProgramCache]: Analyzing trace with hash 2034389572, now seen corresponding path program 3 times [2023-11-19 05:17:19,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:19,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819455263] [2023-11-19 05:17:19,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:19,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:19,514 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:17:19,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752711786] [2023-11-19 05:17:19,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 05:17:19,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:19,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:19,516 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:19,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:17:19,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 05:17:19,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:17:19,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 05:17:19,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:19,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-19 05:17:19,706 INFO L349 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2023-11-19 05:17:19,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 42 [2023-11-19 05:17:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:17:19,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:17:20,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-19 05:17:23,257 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:17:23,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 53 [2023-11-19 05:17:23,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-19 05:17:23,688 INFO L349 Elim1Store]: treesize reduction 96, result has 44.5 percent of original size [2023-11-19 05:17:23,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 249 treesize of output 292 [2023-11-19 05:17:23,841 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:17:23,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 260 treesize of output 324 [2023-11-19 05:17:25,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2023-11-19 05:17:25,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-11-19 05:17:25,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2023-11-19 05:17:25,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2023-11-19 05:17:25,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2023-11-19 05:17:25,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-11-19 05:17:25,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2023-11-19 05:17:25,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2023-11-19 05:17:25,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2023-11-19 05:17:25,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-11-19 05:17:25,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2023-11-19 05:17:25,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2023-11-19 05:17:25,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2023-11-19 05:17:25,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-11-19 05:17:25,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2023-11-19 05:17:25,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2023-11-19 05:17:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 05:17:26,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:26,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819455263] [2023-11-19 05:17:26,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:17:26,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752711786] [2023-11-19 05:17:26,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752711786] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:17:26,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1098861796] [2023-11-19 05:17:26,039 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-19 05:17:26,040 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:17:26,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:17:26,040 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:17:26,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:17:26,426 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:17:26,759 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '476#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (not (= (+ ~N~0 1) |ULTIMATE.start_main_#t~mem13#1|)))' at error location [2023-11-19 05:17:26,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:17:26,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:17:26,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-11-19 05:17:26,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310503977] [2023-11-19 05:17:26,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 05:17:26,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 05:17:26,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:26,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 05:17:26,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=167, Unknown=1, NotChecked=0, Total=210 [2023-11-19 05:17:26,762 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:28,896 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse11 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse2 (mod (+ 4294967295 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse10 (* .cse11 8))) (let ((.cse7 (+ .cse10 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse8 (< .cse11 2147483648)) (.cse3 (< 2147483647 .cse11)) (.cse4 (+ .cse10 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse0 (+ c_~N~0 1)) (.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse6 (* 8 .cse2))) (and (= .cse0 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|)) (or (< .cse2 2147483648) (let ((.cse5 (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368) .cse6)))) (and (or .cse3 (forall ((|ULTIMATE.start_main_~b~0#1.offset| Int) (|ULTIMATE.start_main_~b~0#1.base| Int)) (= (select (store .cse1 .cse4 (+ .cse5 (select (select |c_#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (- 34359738368) .cse6)) 2)) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse0))) (or (forall ((v_prenex_14 Int) (v_prenex_13 Int)) (= (select (store .cse1 .cse7 (+ .cse5 (select (select |c_#memory_int| v_prenex_14) (+ v_prenex_13 (- 34359738368) .cse6)) 2)) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse0)) .cse8)))) (or (let ((.cse9 (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6)))) (and (or (forall ((v_prenex_18 Int) (v_prenex_17 Int)) (= (select (store .cse1 .cse7 (+ (select (select |c_#memory_int| v_prenex_18) (+ v_prenex_17 .cse6)) 2 .cse9)) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse0)) .cse8) (or .cse3 (forall ((v_prenex_16 Int) (v_prenex_15 Int)) (= (select (store .cse1 .cse4 (+ 2 (select (select |c_#memory_int| v_prenex_16) (+ v_prenex_15 .cse6)) .cse9)) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse0))))) (< 2147483647 .cse2)) (not (= |c_ULTIMATE.start_main_~i~0#1| 0)))))) is different from false [2023-11-19 05:17:29,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:29,076 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-11-19 05:17:29,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 05:17:29,077 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-19 05:17:29,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:29,080 INFO L225 Difference]: With dead ends: 31 [2023-11-19 05:17:29,080 INFO L226 Difference]: Without dead ends: 29 [2023-11-19 05:17:29,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=66, Invalid=242, Unknown=2, NotChecked=32, Total=342 [2023-11-19 05:17:29,083 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:29,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 75 Invalid, 0 Unknown, 24 Unchecked, 0.2s Time] [2023-11-19 05:17:29,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-19 05:17:29,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 17. [2023-11-19 05:17:29,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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) [2023-11-19 05:17:29,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-11-19 05:17:29,093 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2023-11-19 05:17:29,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:29,093 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-11-19 05:17:29,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:29,093 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-11-19 05:17:29,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 05:17:29,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:29,094 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:29,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:17:29,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:29,302 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:29,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:29,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1186125732, now seen corresponding path program 4 times [2023-11-19 05:17:29,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:29,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064470188] [2023-11-19 05:17:29,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:29,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:29,366 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:17:29,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831851018] [2023-11-19 05:17:29,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 05:17:29,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:29,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:29,371 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:29,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:17:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:29,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:17:29,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:29,532 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:17:29,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:17:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:17:29,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:29,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064470188] [2023-11-19 05:17:29,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:17:29,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831851018] [2023-11-19 05:17:29,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831851018] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:17:29,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [192785682] [2023-11-19 05:17:29,598 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-19 05:17:29,598 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:17:29,599 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:17:29,599 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:17:29,599 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:17:30,029 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:17:30,363 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '643#(and (= |ULTIMATE.start_main_~i~0#1| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_122| Int)) (and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 |v_ULTIMATE.start_main_~i~0#1_122|) (= |ULTIMATE.start_main_~b~0#1.offset| 0))) (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (not (= (+ ~N~0 1) |ULTIMATE.start_main_#t~mem13#1|)))' at error location [2023-11-19 05:17:30,363 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:17:30,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:17:30,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-11-19 05:17:30,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630505726] [2023-11-19 05:17:30,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 05:17:30,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 05:17:30,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:30,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 05:17:30,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-11-19 05:17:30,366 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:30,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:30,566 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2023-11-19 05:17:30,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:17:30,567 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-19 05:17:30,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:30,568 INFO L225 Difference]: With dead ends: 54 [2023-11-19 05:17:30,568 INFO L226 Difference]: Without dead ends: 43 [2023-11-19 05:17:30,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-11-19 05:17:30,570 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 40 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:30,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 28 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:17:30,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-19 05:17:30,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2023-11-19 05:17:30,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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) [2023-11-19 05:17:30,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-11-19 05:17:30,583 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 13 [2023-11-19 05:17:30,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:30,584 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-11-19 05:17:30,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:30,584 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-11-19 05:17:30,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 05:17:30,585 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:30,585 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:30,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 05:17:30,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:30,799 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:30,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:30,799 INFO L85 PathProgramCache]: Analyzing trace with hash 221349744, now seen corresponding path program 1 times [2023-11-19 05:17:30,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:30,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729238056] [2023-11-19 05:17:30,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:30,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:30,863 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:17:30,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507363695] [2023-11-19 05:17:30,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:30,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:30,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:30,877 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:30,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 05:17:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:31,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-19 05:17:31,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:31,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 05:17:31,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 05:17:31,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-19 05:17:31,186 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:17:31,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-19 05:17:31,236 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:17:31,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2023-11-19 05:17:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:31,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:17:32,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-11-19 05:17:33,270 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:17:33,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 47 [2023-11-19 05:17:33,290 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:17:33,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2023-11-19 05:17:33,446 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:33,461 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:17:33,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 54 [2023-11-19 05:17:33,512 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:17:33,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 53 [2023-11-19 05:17:33,556 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:33,568 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:17:33,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 52 [2023-11-19 05:17:33,601 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:17:33,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 53 [2023-11-19 05:17:33,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:17:33,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 507 treesize of output 501 [2023-11-19 05:17:33,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 305 treesize of output 301 [2023-11-19 05:17:33,743 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:17:33,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 309 treesize of output 299 [2023-11-19 05:17:33,762 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:33,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 294 treesize of output 270 [2023-11-19 05:17:33,783 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:33,810 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:17:33,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 278 treesize of output 279 [2023-11-19 05:17:33,859 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:17:33,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 264 treesize of output 252 [2023-11-19 05:17:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:34,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:34,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729238056] [2023-11-19 05:17:34,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:17:34,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507363695] [2023-11-19 05:17:34,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507363695] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:17:34,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1779728957] [2023-11-19 05:17:34,212 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-19 05:17:34,212 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:17:34,213 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:17:34,213 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:17:34,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:17:34,646 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:17:35,342 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '871#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|))' at error location [2023-11-19 05:17:35,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:17:35,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:17:35,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2023-11-19 05:17:35,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946561374] [2023-11-19 05:17:35,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 05:17:35,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 05:17:35,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:35,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 05:17:35,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=518, Unknown=1, NotChecked=0, Total=600 [2023-11-19 05:17:35,344 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 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) [2023-11-19 05:17:39,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:39,124 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2023-11-19 05:17:39,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 05:17:39,126 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 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 14 [2023-11-19 05:17:39,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:39,127 INFO L225 Difference]: With dead ends: 75 [2023-11-19 05:17:39,127 INFO L226 Difference]: Without dead ends: 65 [2023-11-19 05:17:39,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=223, Invalid=1108, Unknown=1, NotChecked=0, Total=1332 [2023-11-19 05:17:39,130 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 94 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:39,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 79 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 198 Invalid, 2 Unknown, 0 Unchecked, 2.7s Time] [2023-11-19 05:17:39,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-19 05:17:39,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 31. [2023-11-19 05:17:39,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:39,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-11-19 05:17:39,163 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 14 [2023-11-19 05:17:39,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:39,163 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-11-19 05:17:39,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 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) [2023-11-19 05:17:39,164 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-11-19 05:17:39,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 05:17:39,165 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:39,165 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:39,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 05:17:39,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:39,379 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:39,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:39,379 INFO L85 PathProgramCache]: Analyzing trace with hash -211311242, now seen corresponding path program 5 times [2023-11-19 05:17:39,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:39,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858531956] [2023-11-19 05:17:39,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:39,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:39,418 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:17:39,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008289436] [2023-11-19 05:17:39,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:17:39,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:39,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:39,420 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:39,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 05:17:39,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 05:17:39,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:17:39,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 05:17:39,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:39,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:17:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:39,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:39,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858531956] [2023-11-19 05:17:39,976 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:17:39,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008289436] [2023-11-19 05:17:39,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008289436] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:17:39,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2095457893] [2023-11-19 05:17:39,979 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-19 05:17:39,979 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:17:39,979 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:17:39,979 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:17:39,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:17:40,323 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:17:40,536 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1151#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) 0) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (not (= (+ ~N~0 1) |ULTIMATE.start_main_#t~mem13#1|)))' at error location [2023-11-19 05:17:40,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:17:40,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:17:40,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2023-11-19 05:17:40,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179970559] [2023-11-19 05:17:40,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 05:17:40,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 05:17:40,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:40,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 05:17:40,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-11-19 05:17:40,540 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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) [2023-11-19 05:17:40,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:40,842 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2023-11-19 05:17:40,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 05:17:40,842 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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) Word has length 14 [2023-11-19 05:17:40,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:40,843 INFO L225 Difference]: With dead ends: 73 [2023-11-19 05:17:40,843 INFO L226 Difference]: Without dead ends: 65 [2023-11-19 05:17:40,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2023-11-19 05:17:40,845 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 73 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:40,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 50 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:17:40,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-19 05:17:40,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2023-11-19 05:17:40,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 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) [2023-11-19 05:17:40,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-11-19 05:17:40,865 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 14 [2023-11-19 05:17:40,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:40,866 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-11-19 05:17:40,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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) [2023-11-19 05:17:40,866 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-11-19 05:17:40,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 05:17:40,867 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:40,867 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:40,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 05:17:41,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:41,070 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:41,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:41,071 INFO L85 PathProgramCache]: Analyzing trace with hash -582184476, now seen corresponding path program 6 times [2023-11-19 05:17:41,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:41,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480274864] [2023-11-19 05:17:41,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:41,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:41,113 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:17:41,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988873571] [2023-11-19 05:17:41,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 05:17:41,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:41,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:41,122 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:41,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 05:17:41,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 05:17:41,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:17:41,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-19 05:17:41,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:41,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-19 05:17:41,425 INFO L349 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2023-11-19 05:17:41,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 42 [2023-11-19 05:17:41,548 INFO L349 Elim1Store]: treesize reduction 96, result has 27.8 percent of original size [2023-11-19 05:17:41,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 64 treesize of output 86 [2023-11-19 05:17:41,777 INFO L349 Elim1Store]: treesize reduction 187, result has 23.0 percent of original size [2023-11-19 05:17:41,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 107 treesize of output 139 [2023-11-19 05:17:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:17:41,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:17:42,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-19 05:17:42,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-19 05:17:45,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-19 05:17:48,234 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse38 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296)) (.cse20 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (let ((.cse39 (mod .cse20 4294967296)) (.cse8 (* .cse38 8))) (let ((.cse27 (mod (+ 4294967295 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse13 (+ 2 |c_ULTIMATE.start_main_~i~0#1|)) (.cse9 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse10 (+ .cse8 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse4 (* .cse39 8))) (let ((.cse22 (< 2147483647 .cse38)) (.cse14 (< .cse39 2147483648)) (.cse15 (< 2147483647 .cse39)) (.cse18 (+ .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse25 (select .cse9 .cse10)) (.cse26 (+ .cse8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse1 (+ (* 8 (mod .cse13 4294967296)) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse7 (+ .cse4 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse12 (+ c_~N~0 1)) (.cse21 (< .cse38 2147483648)) (.cse11 (* 8 .cse27))) (and (or (let ((.cse2 (select .cse9 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368) .cse11)))) (and (or (and (or (and (forall ((|ULTIMATE.start_main_~b~0#1.offset| Int) (|ULTIMATE.start_main_~b~0#1.base| Int)) (= (select (let ((.cse3 (select (select |c_#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (- 34359738368) .cse11)))) (let ((.cse6 (store .cse9 .cse10 (+ .cse2 .cse3 2)))) (let ((.cse5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse6) |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| .cse8 (- 34359738368))))) (let ((.cse0 (store .cse6 .cse7 (+ .cse2 .cse3 4 .cse5)))) (store .cse0 .cse1 (+ .cse2 .cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse0) |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| .cse4 (- 34359738368))) 6 .cse5)))))) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse12)) (not (= .cse13 0))) .cse14) (or .cse15 (and (forall ((|ULTIMATE.start_main_~b~0#1.offset| Int) (|ULTIMATE.start_main_~b~0#1.base| Int)) (= (select (let ((.cse19 (select (select |c_#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (- 34359738368) .cse11)))) (let ((.cse17 (store .cse9 .cse10 (+ .cse2 .cse19 2)))) (let ((.cse16 (store .cse17 .cse18 (+ .cse2 .cse19 4 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse17) |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| .cse8 (- 34359738368))))))) (store .cse16 .cse1 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse16) |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| .cse4 (- 34359738368))) (select .cse17 .cse7) 2))))) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse12)) (not (= .cse20 0))))) .cse21) (or .cse22 (and (not (= |c_ULTIMATE.start_main_~i~0#1| 0)) (forall ((|ULTIMATE.start_main_~b~0#1.offset| Int) (|ULTIMATE.start_main_~b~0#1.base| Int)) (= (select (let ((.cse24 (store .cse9 .cse26 (+ .cse2 (select (select |c_#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (- 34359738368) .cse11)) 2)))) (let ((.cse23 (store .cse24 .cse18 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse24) |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| .cse8 (- 34359738368))) 2 .cse25)))) (store .cse23 .cse1 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse23) |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| .cse4 (- 34359738368))) (select .cse24 .cse7) 2)))) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse12)))))) (< .cse27 2147483648)) (or (< 2147483647 .cse27) (let ((.cse31 (select .cse9 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse11)))) (and (or .cse22 (and (or (forall ((|ULTIMATE.start_main_~b~0#1.offset| Int) (|ULTIMATE.start_main_~b~0#1.base| Int)) (= (select (let ((.cse30 (store .cse9 .cse26 (+ (select (select |c_#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| .cse11)) 2 .cse31)))) (let ((.cse29 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse30) |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| .cse8 (- 34359738368))))) (let ((.cse28 (store .cse30 .cse7 (+ .cse29 2 .cse25)))) (store .cse28 .cse1 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse28) |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| .cse4 (- 34359738368))) .cse29 .cse25 4))))) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse12)) .cse14) (or .cse15 (forall ((|ULTIMATE.start_main_~b~0#1.offset| Int) (|ULTIMATE.start_main_~b~0#1.base| Int)) (= (select (let ((.cse33 (store .cse9 .cse26 (+ (select (select |c_#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| .cse11)) 2 .cse31)))) (let ((.cse32 (store .cse33 .cse18 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse33) |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| .cse8 (- 34359738368))) 2 .cse25)))) (store .cse32 .cse1 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse32) |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| .cse4 (- 34359738368))) (select .cse33 .cse7) 2)))) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse12))))) (or (forall ((|ULTIMATE.start_main_~b~0#1.offset| Int) (|ULTIMATE.start_main_~b~0#1.base| Int)) (= (select (let ((.cse35 (select (select |c_#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| .cse11)))) (let ((.cse37 (store .cse9 .cse10 (+ .cse35 2 .cse31)))) (let ((.cse36 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse37) |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| .cse8 (- 34359738368))))) (let ((.cse34 (store .cse37 .cse7 (+ .cse35 .cse36 4 .cse31)))) (store .cse34 .cse1 (+ .cse35 .cse36 6 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse34) |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| .cse4 (- 34359738368))) .cse31)))))) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse12)) .cse21))))))))) is different from false [2023-11-19 05:17:50,042 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:17:50,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 53 [2023-11-19 05:17:50,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-19 05:17:51,997 INFO L349 Elim1Store]: treesize reduction 44, result has 58.5 percent of original size [2023-11-19 05:17:51,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1874 treesize of output 1564 [2023-11-19 05:17:52,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:52,013 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:52,025 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:52,063 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:17:52,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 74 [2023-11-19 05:17:52,649 INFO L349 Elim1Store]: treesize reduction 44, result has 58.5 percent of original size [2023-11-19 05:17:52,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1926 treesize of output 1542 [2023-11-19 05:17:52,685 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:52,692 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:52,711 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:53,053 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:17:53,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 1071 treesize of output 742 [2023-11-19 05:17:54,082 INFO L349 Elim1Store]: treesize reduction 44, result has 58.5 percent of original size [2023-11-19 05:17:54,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1740 treesize of output 1496 [2023-11-19 05:17:54,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:54,095 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:54,097 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:54,112 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:17:54,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 30 [2023-11-19 05:17:54,540 INFO L349 Elim1Store]: treesize reduction 16, result has 78.9 percent of original size [2023-11-19 05:17:54,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1842 treesize of output 1477 [2023-11-19 05:17:54,550 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:54,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-19 05:17:54,962 INFO L349 Elim1Store]: treesize reduction 16, result has 78.9 percent of original size [2023-11-19 05:17:54,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1688 treesize of output 1455 [2023-11-19 05:17:54,971 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:54,972 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:54,974 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:54,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-19 05:17:55,480 INFO L349 Elim1Store]: treesize reduction 16, result has 78.9 percent of original size [2023-11-19 05:17:55,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1680 treesize of output 1415 [2023-11-19 05:17:55,490 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:55,492 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:55,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-19 05:17:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 4 not checked. [2023-11-19 05:17:55,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:55,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480274864] [2023-11-19 05:17:55,535 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:17:55,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988873571] [2023-11-19 05:17:55,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988873571] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:17:55,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [387403952] [2023-11-19 05:17:55,538 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-19 05:17:55,538 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:17:55,538 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:17:55,538 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:17:55,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:17:55,845 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:17:56,227 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1425#(and (= |ULTIMATE.start_main_~i~0#1| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_190| Int)) (and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 |v_ULTIMATE.start_main_~i~0#1_190|) (= |ULTIMATE.start_main_~b~0#1.offset| 0))) (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (not (= (+ ~N~0 1) |ULTIMATE.start_main_#t~mem13#1|)))' at error location [2023-11-19 05:17:56,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:17:56,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:17:56,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2023-11-19 05:17:56,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112231431] [2023-11-19 05:17:56,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 05:17:56,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 05:17:56,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:56,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 05:17:56,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=357, Unknown=1, NotChecked=38, Total=462 [2023-11-19 05:17:56,230 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:18:00,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:00,076 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2023-11-19 05:18:00,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 05:18:00,076 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-19 05:18:00,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:00,077 INFO L225 Difference]: With dead ends: 82 [2023-11-19 05:18:00,077 INFO L226 Difference]: Without dead ends: 80 [2023-11-19 05:18:00,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=152, Invalid=843, Unknown=1, NotChecked=60, Total=1056 [2023-11-19 05:18:00,079 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 72 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:00,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 84 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 187 Invalid, 0 Unknown, 60 Unchecked, 1.0s Time] [2023-11-19 05:18:00,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-19 05:18:00,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 39. [2023-11-19 05:18:00,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 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) [2023-11-19 05:18:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2023-11-19 05:18:00,105 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 15 [2023-11-19 05:18:00,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:00,105 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2023-11-19 05:18:00,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:18:00,106 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2023-11-19 05:18:00,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 05:18:00,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:00,107 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:00,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 05:18:00,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:00,314 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:00,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:00,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1238308144, now seen corresponding path program 2 times [2023-11-19 05:18:00,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:00,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991326714] [2023-11-19 05:18:00,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:00,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:00,338 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:18:00,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618514811] [2023-11-19 05:18:00,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:18:00,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:00,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:18:00,340 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:18:00,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 05:18:00,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 05:18:00,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:18:00,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 05:18:00,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:18:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:18:00,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:18:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:18:00,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:00,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991326714] [2023-11-19 05:18:00,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:18:00,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618514811] [2023-11-19 05:18:00,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618514811] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:18:00,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1071754391] [2023-11-19 05:18:00,722 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-19 05:18:00,723 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:18:00,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:18:00,723 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:18:00,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:18:01,094 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:18:01,349 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1737#(and (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|))' at error location [2023-11-19 05:18:01,349 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:18:01,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:18:01,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2023-11-19 05:18:01,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928598740] [2023-11-19 05:18:01,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 05:18:01,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 05:18:01,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:01,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 05:18:01,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-11-19 05:18:01,352 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2023-11-19 05:18:01,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:01,817 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2023-11-19 05:18:01,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 05:18:01,818 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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 16 [2023-11-19 05:18:01,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:01,819 INFO L225 Difference]: With dead ends: 64 [2023-11-19 05:18:01,819 INFO L226 Difference]: Without dead ends: 52 [2023-11-19 05:18:01,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2023-11-19 05:18:01,821 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 110 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:01,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 55 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:18:01,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-19 05:18:01,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 34. [2023-11-19 05:18:01,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 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) [2023-11-19 05:18:01,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-11-19 05:18:01,841 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 16 [2023-11-19 05:18:01,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:01,842 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-11-19 05:18:01,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2023-11-19 05:18:01,842 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-11-19 05:18:01,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 05:18:01,843 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:01,843 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:01,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 05:18:02,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 05:18:02,043 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:02,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:02,044 INFO L85 PathProgramCache]: Analyzing trace with hash -774659120, now seen corresponding path program 3 times [2023-11-19 05:18:02,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:02,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622735115] [2023-11-19 05:18:02,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:02,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:02,074 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:18:02,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412291623] [2023-11-19 05:18:02,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 05:18:02,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:02,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:18:02,076 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:18:02,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db1f0517-753c-4e8e-80bc-6774763ba281/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 05:18:02,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 05:18:02,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:18:02,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-19 05:18:02,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:18:02,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 05:18:02,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 05:18:02,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-19 05:18:02,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-11-19 05:18:03,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-11-19 05:18:03,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 50 [2023-11-19 05:18:03,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 62 [2023-11-19 05:18:03,368 INFO L349 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2023-11-19 05:18:03,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 68 treesize of output 74 [2023-11-19 05:18:03,505 INFO L349 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2023-11-19 05:18:03,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 77 treesize of output 86 [2023-11-19 05:18:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:18:04,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:18:04,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5