./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/bAnd1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/bAnd1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5 --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 ad5600d67d8e26bbe74b5b2723c79b08c56f70a1300290f9b8c920a6b187d1e0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:54:14,125 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:54:14,197 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 19:54:14,202 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:54:14,203 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:54:14,230 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:54:14,231 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:54:14,231 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:54:14,232 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:54:14,233 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:54:14,233 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:54:14,234 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:54:14,235 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:54:14,235 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:54:14,236 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:54:14,236 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:54:14,237 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:54:14,237 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:54:14,238 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:54:14,239 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:54:14,239 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:54:14,240 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:54:14,241 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:54:14,242 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:54:14,242 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:54:14,243 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:54:14,243 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:54:14,244 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:54:14,248 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:54:14,249 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:54:14,249 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:54:14,268 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:54:14,269 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:54:14,269 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:54:14,270 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:54:14,270 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:54:14,270 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:54:14,271 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:54:14,271 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:54:14,272 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:54:14,272 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:54:14,277 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:54:14,277 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:54:14,278 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:54:14,278 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:54:14,279 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:54:14,279 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:54:14,279 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_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad5600d67d8e26bbe74b5b2723c79b08c56f70a1300290f9b8c920a6b187d1e0 [2023-11-21 19:54:14,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:54:14,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:54:14,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:54:14,670 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:54:14,670 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:54:14,672 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/array-crafted/bAnd1.i [2023-11-21 19:54:17,768 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:54:17,969 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:54:17,970 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/sv-benchmarks/c/array-crafted/bAnd1.i [2023-11-21 19:54:17,979 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/data/6a2bad82d/36387088a77b4c108596b1cd093f94e4/FLAG2ffecef3c [2023-11-21 19:54:17,998 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/data/6a2bad82d/36387088a77b4c108596b1cd093f94e4 [2023-11-21 19:54:18,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:54:18,009 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:54:18,013 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:54:18,013 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:54:18,018 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:54:18,021 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:54:18" (1/1) ... [2023-11-21 19:54:18,022 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e040f38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:18, skipping insertion in model container [2023-11-21 19:54:18,023 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:54:18" (1/1) ... [2023-11-21 19:54:18,049 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:54:18,240 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_d9396cea-0476-4fb9-bf50-48c656c7b813/sv-benchmarks/c/array-crafted/bAnd1.i[1290,1303] [2023-11-21 19:54:18,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:54:18,257 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:54:18,295 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_d9396cea-0476-4fb9-bf50-48c656c7b813/sv-benchmarks/c/array-crafted/bAnd1.i[1290,1303] [2023-11-21 19:54:18,297 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:54:18,315 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:54:18,316 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:18 WrapperNode [2023-11-21 19:54:18,316 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:54:18,317 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:54:18,317 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:54:18,318 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:54:18,325 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:18" (1/1) ... [2023-11-21 19:54:18,347 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:18" (1/1) ... [2023-11-21 19:54:18,380 INFO L138 Inliner]: procedures = 16, calls = 31, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2023-11-21 19:54:18,380 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:54:18,381 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:54:18,381 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:54:18,381 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:54:18,391 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:18" (1/1) ... [2023-11-21 19:54:18,392 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:18" (1/1) ... [2023-11-21 19:54:18,399 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:18" (1/1) ... [2023-11-21 19:54:18,400 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:18" (1/1) ... [2023-11-21 19:54:18,410 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:18" (1/1) ... [2023-11-21 19:54:18,419 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:18" (1/1) ... [2023-11-21 19:54:18,422 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:18" (1/1) ... [2023-11-21 19:54:18,432 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:18" (1/1) ... [2023-11-21 19:54:18,434 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:54:18,436 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:54:18,436 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:54:18,436 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:54:18,437 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:18" (1/1) ... [2023-11-21 19:54:18,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:54:18,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:54:18,476 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:54:18,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:54:18,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:54:18,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:54:18,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:54:18,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:54:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2023-11-21 19:54:18,526 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2023-11-21 19:54:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:54:18,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:54:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 19:54:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:54:18,619 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:54:18,621 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:54:18,928 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:54:19,026 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:54:19,027 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 19:54:19,029 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:54:19 BoogieIcfgContainer [2023-11-21 19:54:19,030 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:54:19,033 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:54:19,034 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:54:19,037 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:54:19,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:54:18" (1/3) ... [2023-11-21 19:54:19,038 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c5cc07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:54:19, skipping insertion in model container [2023-11-21 19:54:19,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:18" (2/3) ... [2023-11-21 19:54:19,039 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c5cc07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:54:19, skipping insertion in model container [2023-11-21 19:54:19,040 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:54:19" (3/3) ... [2023-11-21 19:54:19,041 INFO L112 eAbstractionObserver]: Analyzing ICFG bAnd1.i [2023-11-21 19:54:19,063 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:54:19,064 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:54:19,121 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:54:19,129 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;@168168da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:54:19,129 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:54:19,134 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 19:54:19,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-21 19:54:19,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:54:19,144 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:54:19,146 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:54:19,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:54:19,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1964517394, now seen corresponding path program 1 times [2023-11-21 19:54:19,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:54:19,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287632487] [2023-11-21 19:54:19,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:19,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:54:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 19:54:19,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:54:19,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287632487] [2023-11-21 19:54:19,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287632487] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:54:19,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:54:19,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:54:19,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839287736] [2023-11-21 19:54:19,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:54:19,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:54:19,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:54:19,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:54:19,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:54:19,592 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 19:54:19,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:54:19,651 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-11-21 19:54:19,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:54:19,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2023-11-21 19:54:19,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:54:19,661 INFO L225 Difference]: With dead ends: 33 [2023-11-21 19:54:19,662 INFO L226 Difference]: Without dead ends: 16 [2023-11-21 19:54:19,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:54:19,670 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:54:19,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:54:19,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-21 19:54:19,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-21 19:54:19,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 19:54:19,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-11-21 19:54:19,710 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2023-11-21 19:54:19,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:54:19,710 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-11-21 19:54:19,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 19:54:19,711 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-11-21 19:54:19,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 19:54:19,713 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:54:19,713 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:54:19,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:54:19,714 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:54:19,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:54:19,715 INFO L85 PathProgramCache]: Analyzing trace with hash 471054497, now seen corresponding path program 1 times [2023-11-21 19:54:19,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:54:19,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004942690] [2023-11-21 19:54:19,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:19,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:54:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 19:54:19,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:54:19,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004942690] [2023-11-21 19:54:19,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004942690] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:54:19,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063998047] [2023-11-21 19:54:19,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:19,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:54:19,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:54:19,879 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:54:19,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:54:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:20,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:54:20,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:54:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 19:54:20,084 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:54:20,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063998047] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:54:20,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:54:20,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-21 19:54:20,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492021881] [2023-11-21 19:54:20,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:54:20,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:54:20,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:54:20,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:54:20,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:54:20,089 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 19:54:20,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:54:20,113 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2023-11-21 19:54:20,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:54:20,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-11-21 19:54:20,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:54:20,115 INFO L225 Difference]: With dead ends: 29 [2023-11-21 19:54:20,115 INFO L226 Difference]: Without dead ends: 17 [2023-11-21 19:54:20,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:54:20,117 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:54:20,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:54:20,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-21 19:54:20,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-21 19:54:20,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 19:54:20,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-11-21 19:54:20,124 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2023-11-21 19:54:20,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:54:20,125 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-11-21 19:54:20,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 19:54:20,125 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-11-21 19:54:20,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-21 19:54:20,126 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:54:20,126 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:54:20,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 19:54:20,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-21 19:54:20,349 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:54:20,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:54:20,350 INFO L85 PathProgramCache]: Analyzing trace with hash -2097062243, now seen corresponding path program 1 times [2023-11-21 19:54:20,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:54:20,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422968158] [2023-11-21 19:54:20,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:20,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:54:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:20,503 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-21 19:54:20,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:54:20,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422968158] [2023-11-21 19:54:20,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422968158] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:54:20,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989503355] [2023-11-21 19:54:20,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:20,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:54:20,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:54:20,506 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:54:20,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:54:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:20,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:54:20,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:54:20,670 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 19:54:20,671 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:54:20,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989503355] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:54:20,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:54:20,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-21 19:54:20,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116360960] [2023-11-21 19:54:20,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:54:20,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:54:20,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:54:20,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:54:20,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:54:20,677 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 19:54:20,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:54:20,710 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2023-11-21 19:54:20,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:54:20,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-11-21 19:54:20,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:54:20,713 INFO L225 Difference]: With dead ends: 27 [2023-11-21 19:54:20,713 INFO L226 Difference]: Without dead ends: 18 [2023-11-21 19:54:20,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:54:20,719 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:54:20,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:54:20,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-21 19:54:20,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-21 19:54:20,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 19:54:20,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-11-21 19:54:20,735 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2023-11-21 19:54:20,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:54:20,736 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-21 19:54:20,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 19:54:20,737 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-11-21 19:54:20,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-21 19:54:20,739 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:54:20,739 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:54:20,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 19:54:20,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-21 19:54:20,948 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:54:20,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:54:20,949 INFO L85 PathProgramCache]: Analyzing trace with hash -659978442, now seen corresponding path program 1 times [2023-11-21 19:54:20,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:54:20,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322675762] [2023-11-21 19:54:20,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:20,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:54:20,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-21 19:54:21,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:54:21,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322675762] [2023-11-21 19:54:21,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322675762] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:54:21,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424251359] [2023-11-21 19:54:21,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:21,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:54:21,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:54:21,162 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:54:21,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 19:54:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:21,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 19:54:21,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:54:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-21 19:54:21,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:54:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-21 19:54:21,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424251359] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:54:21,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1790477962] [2023-11-21 19:54:21,424 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-21 19:54:21,424 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:54:21,427 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:54:21,433 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:54:21,433 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:54:22,532 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 10 for LOIs [2023-11-21 19:54:22,797 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:54:23,246 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '522#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647))' at error location [2023-11-21 19:54:23,246 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:54:23,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:54:23,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-11-21 19:54:23,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952376274] [2023-11-21 19:54:23,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:54:23,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 19:54:23,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:54:23,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 19:54:23,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=266, Unknown=9, NotChecked=0, Total=342 [2023-11-21 19:54:23,249 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 19:54:23,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:54:23,290 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2023-11-21 19:54:23,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:54:23,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2023-11-21 19:54:23,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:54:23,291 INFO L225 Difference]: With dead ends: 36 [2023-11-21 19:54:23,292 INFO L226 Difference]: Without dead ends: 21 [2023-11-21 19:54:23,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=266, Unknown=9, NotChecked=0, Total=342 [2023-11-21 19:54:23,294 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:54:23,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:54:23,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-21 19:54:23,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-21 19:54:23,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 19:54:23,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-11-21 19:54:23,300 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2023-11-21 19:54:23,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:54:23,300 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-11-21 19:54:23,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 19:54:23,301 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-11-21 19:54:23,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-21 19:54:23,302 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:54:23,302 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:54:23,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 19:54:23,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:54:23,524 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:54:23,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:54:23,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1900473539, now seen corresponding path program 2 times [2023-11-21 19:54:23,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:54:23,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514535624] [2023-11-21 19:54:23,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:23,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:54:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-21 19:54:23,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:54:23,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514535624] [2023-11-21 19:54:23,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514535624] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:54:23,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705512357] [2023-11-21 19:54:23,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 19:54:23,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:54:23,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:54:23,737 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:54:23,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 19:54:23,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-21 19:54:23,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:54:23,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 19:54:23,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:54:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-21 19:54:23,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:54:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-21 19:54:23,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705512357] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:54:23,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [930270738] [2023-11-21 19:54:23,888 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-21 19:54:23,888 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:54:23,889 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:54:23,889 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:54:23,889 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:54:24,449 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 10 for LOIs [2023-11-21 19:54:24,606 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:54:24,994 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '794#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647))' at error location [2023-11-21 19:54:24,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:54:24,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:54:24,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-21 19:54:24,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117143381] [2023-11-21 19:54:24,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:54:24,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 19:54:24,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:54:24,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 19:54:24,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=266, Unknown=9, NotChecked=0, Total=342 [2023-11-21 19:54:25,000 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 19:54:25,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:54:25,049 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2023-11-21 19:54:25,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:54:25,050 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2023-11-21 19:54:25,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:54:25,051 INFO L225 Difference]: With dead ends: 38 [2023-11-21 19:54:25,052 INFO L226 Difference]: Without dead ends: 24 [2023-11-21 19:54:25,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=266, Unknown=9, NotChecked=0, Total=342 [2023-11-21 19:54:25,054 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:54:25,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:54:25,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-21 19:54:25,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-21 19:54:25,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 19:54:25,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-21 19:54:25,059 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2023-11-21 19:54:25,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:54:25,060 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-21 19:54:25,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 19:54:25,060 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-21 19:54:25,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-21 19:54:25,062 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:54:25,062 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:54:25,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 19:54:25,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:54:25,279 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:54:25,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:54:25,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1381916765, now seen corresponding path program 3 times [2023-11-21 19:54:25,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:54:25,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740101842] [2023-11-21 19:54:25,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:25,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:54:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-11-21 19:54:25,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:54:25,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740101842] [2023-11-21 19:54:25,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740101842] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:54:25,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347196516] [2023-11-21 19:54:25,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 19:54:25,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:54:25,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:54:25,422 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:54:25,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 19:54:25,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 19:54:25,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:54:25,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 19:54:25,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:54:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-21 19:54:25,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:54:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-21 19:54:25,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347196516] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:54:25,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [321655775] [2023-11-21 19:54:25,684 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-21 19:54:25,684 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:54:25,685 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:54:25,685 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:54:25,685 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:54:26,188 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 10 for LOIs [2023-11-21 19:54:26,397 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:54:26,835 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1137#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647))' at error location [2023-11-21 19:54:26,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:54:26,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:54:26,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2023-11-21 19:54:26,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186210087] [2023-11-21 19:54:26,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:54:26,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 19:54:26,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:54:26,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 19:54:26,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=524, Unknown=9, NotChecked=0, Total=650 [2023-11-21 19:54:26,838 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-21 19:54:26,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:54:26,888 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2023-11-21 19:54:26,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 19:54:26,889 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 37 [2023-11-21 19:54:26,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:54:26,890 INFO L225 Difference]: With dead ends: 49 [2023-11-21 19:54:26,890 INFO L226 Difference]: Without dead ends: 31 [2023-11-21 19:54:26,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=524, Unknown=9, NotChecked=0, Total=650 [2023-11-21 19:54:26,892 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:54:26,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:54:26,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-21 19:54:26,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-21 19:54:26,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 19:54:26,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-11-21 19:54:26,899 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2023-11-21 19:54:26,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:54:26,899 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-11-21 19:54:26,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-21 19:54:26,899 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-11-21 19:54:26,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-21 19:54:26,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:54:26,901 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:54:26,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 19:54:27,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-21 19:54:27,117 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:54:27,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:54:27,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1166051090, now seen corresponding path program 4 times [2023-11-21 19:54:27,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:54:27,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724591201] [2023-11-21 19:54:27,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:27,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:54:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-11-21 19:54:27,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:54:27,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724591201] [2023-11-21 19:54:27,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724591201] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:54:27,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783931382] [2023-11-21 19:54:27,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-21 19:54:27,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:54:27,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:54:27,602 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:54:27,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 19:54:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:27,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 19:54:27,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:54:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-11-21 19:54:27,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:54:28,024 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-11-21 19:54:28,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783931382] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:54:28,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1537673118] [2023-11-21 19:54:28,029 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-21 19:54:28,030 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:54:28,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:54:28,034 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:54:28,035 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:54:28,514 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 10 for LOIs [2023-11-21 19:54:28,703 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:54:29,152 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1569#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647))' at error location [2023-11-21 19:54:29,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:54:29,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:54:29,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2023-11-21 19:54:29,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547312350] [2023-11-21 19:54:29,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:54:29,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-21 19:54:29,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:54:29,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-21 19:54:29,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=977, Unknown=9, NotChecked=0, Total=1332 [2023-11-21 19:54:29,155 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 19:54:29,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:54:29,231 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2023-11-21 19:54:29,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-21 19:54:29,232 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2023-11-21 19:54:29,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:54:29,233 INFO L225 Difference]: With dead ends: 62 [2023-11-21 19:54:29,234 INFO L226 Difference]: Without dead ends: 43 [2023-11-21 19:54:29,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=346, Invalid=977, Unknown=9, NotChecked=0, Total=1332 [2023-11-21 19:54:29,236 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:54:29,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:54:29,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-21 19:54:29,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-21 19:54:29,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 19:54:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2023-11-21 19:54:29,244 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 44 [2023-11-21 19:54:29,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:54:29,244 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2023-11-21 19:54:29,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 19:54:29,245 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2023-11-21 19:54:29,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-21 19:54:29,246 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:54:29,247 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:54:29,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 19:54:29,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:54:29,468 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:54:29,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:54:29,469 INFO L85 PathProgramCache]: Analyzing trace with hash 837015342, now seen corresponding path program 5 times [2023-11-21 19:54:29,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:54:29,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222789809] [2023-11-21 19:54:29,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:29,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:54:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-11-21 19:54:30,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:54:30,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222789809] [2023-11-21 19:54:30,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222789809] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:54:30,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803731755] [2023-11-21 19:54:30,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 19:54:30,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:54:30,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:54:30,425 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:54:30,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 19:54:30,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-21 19:54:30,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:54:30,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 19:54:30,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:54:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-11-21 19:54:30,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:54:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-11-21 19:54:30,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803731755] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:54:30,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [638833156] [2023-11-21 19:54:30,793 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-21 19:54:30,793 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:54:30,794 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:54:30,794 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:54:30,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:54:31,247 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 10 for LOIs [2023-11-21 19:54:31,371 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:54:31,979 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2133#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647))' at error location [2023-11-21 19:54:31,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:54:31,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:54:31,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-11-21 19:54:31,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640669906] [2023-11-21 19:54:31,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:54:31,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-21 19:54:31,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:54:31,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-21 19:54:31,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=1742, Unknown=9, NotChecked=0, Total=2162 [2023-11-21 19:54:31,984 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 19:54:32,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:54:32,101 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2023-11-21 19:54:32,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-21 19:54:32,102 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2023-11-21 19:54:32,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:54:32,103 INFO L225 Difference]: With dead ends: 69 [2023-11-21 19:54:32,103 INFO L226 Difference]: Without dead ends: 50 [2023-11-21 19:54:32,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=411, Invalid=1742, Unknown=9, NotChecked=0, Total=2162 [2023-11-21 19:54:32,105 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:54:32,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 137 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:54:32,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-21 19:54:32,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-21 19:54:32,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 19:54:32,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2023-11-21 19:54:32,114 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 56 [2023-11-21 19:54:32,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:54:32,114 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2023-11-21 19:54:32,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 19:54:32,115 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2023-11-21 19:54:32,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-21 19:54:32,116 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:54:32,116 INFO L195 NwaCegarLoop]: trace histogram [30, 23, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:54:32,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 19:54:32,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-21 19:54:32,338 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:54:32,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:54:32,339 INFO L85 PathProgramCache]: Analyzing trace with hash -384222367, now seen corresponding path program 6 times [2023-11-21 19:54:32,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:54:32,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952447122] [2023-11-21 19:54:32,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:32,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:54:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-11-21 19:54:33,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:54:33,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952447122] [2023-11-21 19:54:33,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952447122] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:54:33,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129672901] [2023-11-21 19:54:33,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 19:54:33,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:54:33,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:54:33,730 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:54:33,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 19:54:33,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 19:54:33,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:54:33,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-21 19:54:33,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:54:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-11-21 19:54:34,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:54:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-11-21 19:54:34,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129672901] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:54:34,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1724767127] [2023-11-21 19:54:34,922 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-21 19:54:34,923 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:54:34,923 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:54:34,923 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:54:34,924 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:54:35,353 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 10 for LOIs [2023-11-21 19:54:35,495 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:54:36,030 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2855#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647))' at error location [2023-11-21 19:54:36,030 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:54:36,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:54:36,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 51 [2023-11-21 19:54:36,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493800170] [2023-11-21 19:54:36,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:54:36,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-21 19:54:36,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:54:36,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-21 19:54:36,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1321, Invalid=2576, Unknown=9, NotChecked=0, Total=3906 [2023-11-21 19:54:36,036 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 19:54:36,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:54:36,148 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2023-11-21 19:54:36,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-21 19:54:36,149 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 75 [2023-11-21 19:54:36,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:54:36,154 INFO L225 Difference]: With dead ends: 100 [2023-11-21 19:54:36,154 INFO L226 Difference]: Without dead ends: 75 [2023-11-21 19:54:36,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1321, Invalid=2576, Unknown=9, NotChecked=0, Total=3906 [2023-11-21 19:54:36,159 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:54:36,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:54:36,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-21 19:54:36,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-21 19:54:36,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 19:54:36,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2023-11-21 19:54:36,178 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 75 [2023-11-21 19:54:36,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:54:36,180 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2023-11-21 19:54:36,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 19:54:36,181 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2023-11-21 19:54:36,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-21 19:54:36,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:54:36,189 INFO L195 NwaCegarLoop]: trace histogram [48, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:54:36,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 19:54:36,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-21 19:54:36,405 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:54:36,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:54:36,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1167545906, now seen corresponding path program 7 times [2023-11-21 19:54:36,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:54:36,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035062283] [2023-11-21 19:54:36,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:36,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:54:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:39,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-11-21 19:54:39,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:54:39,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035062283] [2023-11-21 19:54:39,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035062283] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:54:39,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599558647] [2023-11-21 19:54:39,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-21 19:54:39,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:54:39,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:54:39,573 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:54:39,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 19:54:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:39,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-21 19:54:39,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:54:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-11-21 19:54:39,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:54:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-11-21 19:54:43,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599558647] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:54:43,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [294735887] [2023-11-21 19:54:43,714 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-21 19:54:43,714 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:54:43,715 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:54:43,715 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:54:43,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:54:44,121 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 10 for LOIs [2023-11-21 19:54:44,270 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:54:45,058 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3889#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647))' at error location [2023-11-21 19:54:45,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:54:45,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:54:45,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 51] total 101 [2023-11-21 19:54:45,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788130364] [2023-11-21 19:54:45,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:54:45,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-11-21 19:54:45,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:54:45,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-11-21 19:54:45,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5096, Invalid=7551, Unknown=9, NotChecked=0, Total=12656 [2023-11-21 19:54:45,068 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 19:54:45,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:54:45,297 INFO L93 Difference]: Finished difference Result 150 states and 207 transitions. [2023-11-21 19:54:45,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-11-21 19:54:45,298 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 100 [2023-11-21 19:54:45,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:54:45,300 INFO L225 Difference]: With dead ends: 150 [2023-11-21 19:54:45,300 INFO L226 Difference]: Without dead ends: 125 [2023-11-21 19:54:45,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1982 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5096, Invalid=7551, Unknown=9, NotChecked=0, Total=12656 [2023-11-21 19:54:45,309 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:54:45,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:54:45,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-21 19:54:45,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-11-21 19:54:45,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 19:54:45,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2023-11-21 19:54:45,344 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 100 [2023-11-21 19:54:45,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:54:45,346 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2023-11-21 19:54:45,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 19:54:45,347 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2023-11-21 19:54:45,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-21 19:54:45,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:54:45,356 INFO L195 NwaCegarLoop]: trace histogram [98, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:54:45,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 19:54:45,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-21 19:54:45,579 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:54:45,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:54:45,580 INFO L85 PathProgramCache]: Analyzing trace with hash 600635694, now seen corresponding path program 8 times [2023-11-21 19:54:45,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:54:45,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390379751] [2023-11-21 19:54:45,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:45,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:54:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-11-21 19:54:54,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:54:54,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390379751] [2023-11-21 19:54:54,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390379751] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:54:54,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28600135] [2023-11-21 19:54:54,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 19:54:54,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:54:54,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:54:54,850 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:54:54,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-21 19:54:55,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-21 19:54:55,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:54:55,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 19:54:55,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:54:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 5139 trivial. 0 not checked. [2023-11-21 19:54:55,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:54:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5385 trivial. 0 not checked. [2023-11-21 19:54:55,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28600135] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:54:55,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [815663148] [2023-11-21 19:54:55,443 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-21 19:54:55,443 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:54:55,444 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:54:55,444 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:54:55,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:54:55,823 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 10 for LOIs [2023-11-21 19:54:55,955 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:54:57,256 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5429#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647))' at error location [2023-11-21 19:54:57,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-21 19:54:57,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:54:57,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 107 [2023-11-21 19:54:57,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500637431] [2023-11-21 19:54:57,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:54:57,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-11-21 19:54:57,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:54:57,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-11-21 19:54:57,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5123, Invalid=8910, Unknown=9, NotChecked=0, Total=14042 [2023-11-21 19:54:57,268 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 19:54:57,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:54:57,468 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2023-11-21 19:54:57,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-11-21 19:54:57,469 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2023-11-21 19:54:57,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:54:57,471 INFO L225 Difference]: With dead ends: 155 [2023-11-21 19:54:57,471 INFO L226 Difference]: Without dead ends: 130 [2023-11-21 19:54:57,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=5123, Invalid=8910, Unknown=9, NotChecked=0, Total=14042 [2023-11-21 19:54:57,475 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:54:57,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:54:57,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-21 19:54:57,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2023-11-21 19:54:57,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 19:54:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2023-11-21 19:54:57,490 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 150 [2023-11-21 19:54:57,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:54:57,490 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2023-11-21 19:54:57,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 19:54:57,491 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2023-11-21 19:54:57,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-21 19:54:57,493 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:54:57,493 INFO L195 NwaCegarLoop]: trace histogram [99, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:54:57,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-21 19:54:57,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9396cea-0476-4fb9-bf50-48c656c7b813/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:54:57,713 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:54:57,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:54:57,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1996538655, now seen corresponding path program 9 times [2023-11-21 19:54:57,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:54:57,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521066969] [2023-11-21 19:54:57,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:57,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:54:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat