./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-1a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_91d5be9e-694b-4b64-a11a-98c5723da168/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d5be9e-694b-4b64-a11a-98c5723da168/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d5be9e-694b-4b64-a11a-98c5723da168/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d5be9e-694b-4b64-a11a-98c5723da168/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-1a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d5be9e-694b-4b64-a11a-98c5723da168/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d5be9e-694b-4b64-a11a-98c5723da168/bin/utaipan-verify-mE87zJ7Ire --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 ae696ef581cbe995636ab4900ea04e2b993d78100fba8db2a87ca7d99c3a6d1e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:29:47,766 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:29:47,881 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d5be9e-694b-4b64-a11a-98c5723da168/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:29:47,893 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:29:47,894 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:29:47,935 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:29:47,935 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:29:47,936 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:29:47,937 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:29:47,942 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:29:47,943 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:29:47,943 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:29:47,943 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:29:47,945 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:29:47,946 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:29:47,946 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:29:47,946 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:29:47,947 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:29:47,947 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:29:47,948 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:29:47,948 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:29:47,949 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:29:47,949 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:29:47,950 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:29:47,950 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:29:47,950 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:29:47,951 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:29:47,951 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:29:47,952 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:29:47,952 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:29:47,953 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:29:47,953 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:29:47,954 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:29:47,954 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:29:47,954 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:29:47,954 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:29:47,954 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:29:47,955 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:29:47,955 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:29:47,955 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:29:47,955 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:29:47,956 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:29:47,956 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:29:47,956 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:29:47,957 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:29:47,957 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:29:47,957 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:29:47,957 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_91d5be9e-694b-4b64-a11a-98c5723da168/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d5be9e-694b-4b64-a11a-98c5723da168/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ae696ef581cbe995636ab4900ea04e2b993d78100fba8db2a87ca7d99c3a6d1e [2023-11-23 21:29:48,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:29:48,276 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:29:48,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:29:48,281 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:29:48,282 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:29:48,283 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d5be9e-694b-4b64-a11a-98c5723da168/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-1a.c [2023-11-23 21:29:51,393 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:29:51,672 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:29:51,673 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d5be9e-694b-4b64-a11a-98c5723da168/sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-1a.c [2023-11-23 21:29:51,690 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d5be9e-694b-4b64-a11a-98c5723da168/bin/utaipan-verify-mE87zJ7Ire/data/f47f80204/347c19464b4d4998a00d8a658d32e293/FLAGdc40e0717 [2023-11-23 21:29:51,710 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d5be9e-694b-4b64-a11a-98c5723da168/bin/utaipan-verify-mE87zJ7Ire/data/f47f80204/347c19464b4d4998a00d8a658d32e293 [2023-11-23 21:29:51,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:29:51,718 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:29:51,722 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:29:51,722 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:29:51,728 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:29:51,728 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:29:51" (1/1) ... [2023-11-23 21:29:51,730 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@104666cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:51, skipping insertion in model container [2023-11-23 21:29:51,730 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:29:51" (1/1) ... [2023-11-23 21:29:51,792 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:29:52,026 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_91d5be9e-694b-4b64-a11a-98c5723da168/sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-1a.c[37883,37896] [2023-11-23 21:29:52,037 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:29:52,047 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:29:52,105 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_91d5be9e-694b-4b64-a11a-98c5723da168/sv-benchmarks/c/bitvector/s3_clnt_3.BV.c.cil-1a.c[37883,37896] [2023-11-23 21:29:52,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:29:52,124 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:29:52,125 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52 WrapperNode [2023-11-23 21:29:52,125 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:29:52,126 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:29:52,126 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:29:52,127 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:29:52,134 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (1/1) ... [2023-11-23 21:29:52,146 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (1/1) ... [2023-11-23 21:29:52,203 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 543 [2023-11-23 21:29:52,204 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:29:52,205 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:29:52,205 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:29:52,205 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:29:52,215 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (1/1) ... [2023-11-23 21:29:52,215 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (1/1) ... [2023-11-23 21:29:52,220 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (1/1) ... [2023-11-23 21:29:52,220 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (1/1) ... [2023-11-23 21:29:52,230 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (1/1) ... [2023-11-23 21:29:52,252 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (1/1) ... [2023-11-23 21:29:52,255 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (1/1) ... [2023-11-23 21:29:52,258 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (1/1) ... [2023-11-23 21:29:52,263 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:29:52,264 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:29:52,264 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:29:52,264 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:29:52,265 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (1/1) ... [2023-11-23 21:29:52,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:29:52,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d5be9e-694b-4b64-a11a-98c5723da168/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:52,306 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d5be9e-694b-4b64-a11a-98c5723da168/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:29:52,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d5be9e-694b-4b64-a11a-98c5723da168/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:29:52,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:29:52,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:29:52,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:29:52,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:29:52,534 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:29:52,537 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:29:52,568 WARN L821 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-11-23 21:29:53,137 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##87: assume false; [2023-11-23 21:29:53,137 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##88: assume !false; [2023-11-23 21:29:53,137 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:29:53,482 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:29:53,483 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:29:53,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:29:53 BoogieIcfgContainer [2023-11-23 21:29:53,485 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:29:53,487 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:29:53,488 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:29:53,492 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:29:53,492 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:29:51" (1/3) ... [2023-11-23 21:29:53,494 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7469b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:29:53, skipping insertion in model container [2023-11-23 21:29:53,494 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:52" (2/3) ... [2023-11-23 21:29:53,496 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7469b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:29:53, skipping insertion in model container [2023-11-23 21:29:53,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:29:53" (3/3) ... [2023-11-23 21:29:53,499 INFO L112 eAbstractionObserver]: Analyzing ICFG s3_clnt_3.BV.c.cil-1a.c [2023-11-23 21:29:53,520 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:29:53,521 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:29:53,597 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:29:53,605 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;@4ec57169, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:29:53,606 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:29:53,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 82 states have (on average 1.7682926829268293) internal successors, (145), 83 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:29:53,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:29:53,621 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:53,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:53,622 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:53,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:53,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1361727280, now seen corresponding path program 1 times [2023-11-23 21:29:53,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:53,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711405792] [2023-11-23 21:29:53,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:53,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:53,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:53,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:29:53,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:53,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711405792] [2023-11-23 21:29:53,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711405792] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:53,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:53,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:29:53,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222430768] [2023-11-23 21:29:53,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:53,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:29:53,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:53,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:29:53,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:29:53,953 INFO L87 Difference]: Start difference. First operand has 84 states, 82 states have (on average 1.7682926829268293) internal successors, (145), 83 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:29:54,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:54,130 INFO L93 Difference]: Finished difference Result 169 states and 293 transitions. [2023-11-23 21:29:54,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:29:54,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-23 21:29:54,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:54,143 INFO L225 Difference]: With dead ends: 169 [2023-11-23 21:29:54,143 INFO L226 Difference]: Without dead ends: 83 [2023-11-23 21:29:54,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:29:54,150 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:54,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 179 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:29:54,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-23 21:29:54,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-23 21:29:54,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.4634146341463414) internal successors, (120), 82 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:29:54,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 120 transitions. [2023-11-23 21:29:54,194 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 120 transitions. Word has length 19 [2023-11-23 21:29:54,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:54,195 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 120 transitions. [2023-11-23 21:29:54,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:29:54,195 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 120 transitions. [2023-11-23 21:29:54,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 21:29:54,197 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:54,197 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:54,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:29:54,198 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:54,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:54,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1248240514, now seen corresponding path program 1 times [2023-11-23 21:29:54,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:54,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527284522] [2023-11-23 21:29:54,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:54,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:29:54,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:54,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527284522] [2023-11-23 21:29:54,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527284522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:54,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:54,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:29:54,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818999778] [2023-11-23 21:29:54,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:54,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:29:54,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:54,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:29:54,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:29:54,313 INFO L87 Difference]: Start difference. First operand 83 states and 120 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:29:54,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:54,487 INFO L93 Difference]: Finished difference Result 178 states and 261 transitions. [2023-11-23 21:29:54,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:29:54,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-23 21:29:54,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:54,490 INFO L225 Difference]: With dead ends: 178 [2023-11-23 21:29:54,490 INFO L226 Difference]: Without dead ends: 98 [2023-11-23 21:29:54,491 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 [2023-11-23 21:29:54,492 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 8 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:54,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 129 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:29:54,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-23 21:29:54,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2023-11-23 21:29:54,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.431578947368421) internal successors, (136), 95 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:29:54,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 136 transitions. [2023-11-23 21:29:54,504 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 136 transitions. Word has length 28 [2023-11-23 21:29:54,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:54,504 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 136 transitions. [2023-11-23 21:29:54,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:29:54,505 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 136 transitions. [2023-11-23 21:29:54,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 21:29:54,506 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:54,506 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:54,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:29:54,507 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:54,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:54,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1778735984, now seen corresponding path program 1 times [2023-11-23 21:29:54,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:54,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58778892] [2023-11-23 21:29:54,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:54,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:29:54,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:54,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58778892] [2023-11-23 21:29:54,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58778892] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:54,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:54,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:29:54,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073605228] [2023-11-23 21:29:54,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:54,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:29:54,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:54,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:29:54,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:29:54,656 INFO L87 Difference]: Start difference. First operand 96 states and 136 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:29:54,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:54,810 INFO L93 Difference]: Finished difference Result 206 states and 297 transitions. [2023-11-23 21:29:54,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:29:54,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-23 21:29:54,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:54,821 INFO L225 Difference]: With dead ends: 206 [2023-11-23 21:29:54,822 INFO L226 Difference]: Without dead ends: 113 [2023-11-23 21:29:54,828 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 [2023-11-23 21:29:54,830 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 8 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:54,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 140 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:29:54,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-23 21:29:54,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2023-11-23 21:29:54,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.4) internal successors, (154), 110 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:29:54,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 154 transitions. [2023-11-23 21:29:54,855 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 154 transitions. Word has length 39 [2023-11-23 21:29:54,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:54,856 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 154 transitions. [2023-11-23 21:29:54,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:29:54,857 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 154 transitions. [2023-11-23 21:29:54,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-23 21:29:54,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:54,861 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:54,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:29:54,862 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:54,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:54,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1029738308, now seen corresponding path program 1 times [2023-11-23 21:29:54,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:54,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674238859] [2023-11-23 21:29:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:54,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:29:55,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:55,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674238859] [2023-11-23 21:29:55,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674238859] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:29:55,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513637066] [2023-11-23 21:29:55,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:55,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:55,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d5be9e-694b-4b64-a11a-98c5723da168/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:55,220 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d5be9e-694b-4b64-a11a-98c5723da168/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:55,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d5be9e-694b-4b64-a11a-98c5723da168/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:29:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:55,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:29:55,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:29:55,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:29:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-23 21:29:55,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513637066] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:29:55,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [967213821] [2023-11-23 21:29:55,812 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-11-23 21:29:55,813 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:29:55,818 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:29:55,823 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:29:55,823 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:30:03,844 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:30:05,466 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1275#(and (= 4432 |ULTIMATE.start_ssl3_connect_~s__state~0#1|) (= |ULTIMATE.start_ssl3_connect_~tmp___0~0#1| 0) (= 5 |ULTIMATE.start_ssl3_connect_~blastFlag~0#1|) (= |ULTIMATE.start_ssl3_connect_~skip~0#1| 0) (<= |ULTIMATE.start_ssl3_connect_~ret~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_ssl3_connect_~ret~0#1|)) (= 4432 |ULTIMATE.start_ssl3_connect_~state~0#1|))' at error location [2023-11-23 21:30:05,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:30:05,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:30:05,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-11-23 21:30:05,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087067898] [2023-11-23 21:30:05,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:30:05,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:30:05,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:05,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:30:05,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1095, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 21:30:05,469 INFO L87 Difference]: Start difference. First operand 111 states and 154 transitions. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:05,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:05,654 INFO L93 Difference]: Finished difference Result 464 states and 645 transitions. [2023-11-23 21:30:05,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:30:05,655 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-11-23 21:30:05,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:05,658 INFO L225 Difference]: With dead ends: 464 [2023-11-23 21:30:05,659 INFO L226 Difference]: Without dead ends: 462 [2023-11-23 21:30:05,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=237, Invalid=1095, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 21:30:05,661 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 371 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:05,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 785 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:30:05,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2023-11-23 21:30:05,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 385. [2023-11-23 21:30:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.4322916666666667) internal successors, (550), 384 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:05,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 550 transitions. [2023-11-23 21:30:05,689 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 550 transitions. Word has length 52 [2023-11-23 21:30:05,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:05,690 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 550 transitions. [2023-11-23 21:30:05,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:05,690 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 550 transitions. [2023-11-23 21:30:05,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-23 21:30:05,696 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:05,696 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:05,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d5be9e-694b-4b64-a11a-98c5723da168/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 21:30:05,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d5be9e-694b-4b64-a11a-98c5723da168/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:05,909 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:05,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:05,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1948113567, now seen corresponding path program 1 times [2023-11-23 21:30:05,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:05,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973968240] [2023-11-23 21:30:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:05,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:06,064 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-23 21:30:06,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:06,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973968240] [2023-11-23 21:30:06,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973968240] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:06,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:06,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:30:06,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51192418] [2023-11-23 21:30:06,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:06,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:30:06,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:06,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:30:06,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:30:06,070 INFO L87 Difference]: Start difference. First operand 385 states and 550 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:06,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:06,231 INFO L93 Difference]: Finished difference Result 944 states and 1413 transitions. [2023-11-23 21:30:06,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:30:06,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2023-11-23 21:30:06,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:06,239 INFO L225 Difference]: With dead ends: 944 [2023-11-23 21:30:06,239 INFO L226 Difference]: Without dead ends: 558 [2023-11-23 21:30:06,241 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 [2023-11-23 21:30:06,242 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 50 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:06,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 136 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:30:06,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2023-11-23 21:30:06,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 537. [2023-11-23 21:30:06,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 1.4813432835820894) internal successors, (794), 536 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:06,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 794 transitions. [2023-11-23 21:30:06,276 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 794 transitions. Word has length 99 [2023-11-23 21:30:06,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:06,276 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 794 transitions. [2023-11-23 21:30:06,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:06,277 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 794 transitions. [2023-11-23 21:30:06,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-23 21:30:06,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:06,282 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:06,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:30:06,283 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:06,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:06,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1096228417, now seen corresponding path program 2 times [2023-11-23 21:30:06,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:06,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243428237] [2023-11-23 21:30:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:06,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-23 21:30:06,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:06,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243428237] [2023-11-23 21:30:06,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243428237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:06,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:06,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:30:06,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616342508] [2023-11-23 21:30:06,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:06,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:30:06,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:06,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:30:06,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:30:06,432 INFO L87 Difference]: Start difference. First operand 537 states and 794 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:06,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:06,607 INFO L93 Difference]: Finished difference Result 1375 states and 2097 transitions. [2023-11-23 21:30:06,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:30:06,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2023-11-23 21:30:06,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:06,614 INFO L225 Difference]: With dead ends: 1375 [2023-11-23 21:30:06,614 INFO L226 Difference]: Without dead ends: 790 [2023-11-23 21:30:06,616 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 [2023-11-23 21:30:06,618 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 59 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:06,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 120 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:30:06,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2023-11-23 21:30:06,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 752. [2023-11-23 21:30:06,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 1.430093209054594) internal successors, (1074), 751 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:06,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1074 transitions. [2023-11-23 21:30:06,648 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1074 transitions. Word has length 119 [2023-11-23 21:30:06,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:06,648 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 1074 transitions. [2023-11-23 21:30:06,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:06,649 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1074 transitions. [2023-11-23 21:30:06,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-23 21:30:06,656 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:06,657 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 8, 8, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:06,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:30:06,657 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:06,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:06,657 INFO L85 PathProgramCache]: Analyzing trace with hash -179660787, now seen corresponding path program 1 times [2023-11-23 21:30:06,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:06,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355099339] [2023-11-23 21:30:06,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:06,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 214 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2023-11-23 21:30:06,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:06,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355099339] [2023-11-23 21:30:06,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355099339] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:06,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:06,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:30:06,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705358786] [2023-11-23 21:30:06,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:06,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:30:06,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:06,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:30:06,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:30:06,805 INFO L87 Difference]: Start difference. First operand 752 states and 1074 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:06,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:06,973 INFO L93 Difference]: Finished difference Result 1648 states and 2364 transitions. [2023-11-23 21:30:06,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:30:06,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2023-11-23 21:30:06,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:06,979 INFO L225 Difference]: With dead ends: 1648 [2023-11-23 21:30:06,979 INFO L226 Difference]: Without dead ends: 854 [2023-11-23 21:30:06,981 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 [2023-11-23 21:30:06,982 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 61 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:06,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 116 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:30:06,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2023-11-23 21:30:07,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 821. [2023-11-23 21:30:07,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 1.4121951219512194) internal successors, (1158), 820 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:07,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1158 transitions. [2023-11-23 21:30:07,010 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1158 transitions. Word has length 139 [2023-11-23 21:30:07,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:07,011 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 1158 transitions. [2023-11-23 21:30:07,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:07,011 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1158 transitions. [2023-11-23 21:30:07,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-11-23 21:30:07,014 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:07,015 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 9, 7, 7, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:07,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:30:07,015 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:07,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:07,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1913734292, now seen corresponding path program 1 times [2023-11-23 21:30:07,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:07,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925922240] [2023-11-23 21:30:07,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:07,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2023-11-23 21:30:07,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:07,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925922240] [2023-11-23 21:30:07,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925922240] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:07,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:07,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:30:07,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328951159] [2023-11-23 21:30:07,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:07,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:30:07,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:07,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:30:07,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:30:07,173 INFO L87 Difference]: Start difference. First operand 821 states and 1158 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:07,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:07,340 INFO L93 Difference]: Finished difference Result 1824 states and 2593 transitions. [2023-11-23 21:30:07,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:30:07,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2023-11-23 21:30:07,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:07,346 INFO L225 Difference]: With dead ends: 1824 [2023-11-23 21:30:07,346 INFO L226 Difference]: Without dead ends: 970 [2023-11-23 21:30:07,347 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 [2023-11-23 21:30:07,348 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 63 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:07,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 114 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:30:07,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2023-11-23 21:30:07,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 937. [2023-11-23 21:30:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 1.4081196581196582) internal successors, (1318), 936 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:07,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1318 transitions. [2023-11-23 21:30:07,375 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1318 transitions. Word has length 160 [2023-11-23 21:30:07,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:07,375 INFO L495 AbstractCegarLoop]: Abstraction has 937 states and 1318 transitions. [2023-11-23 21:30:07,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:07,376 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1318 transitions. [2023-11-23 21:30:07,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-11-23 21:30:07,379 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:07,379 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 10, 8, 8, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:07,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:30:07,380 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:07,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:07,380 INFO L85 PathProgramCache]: Analyzing trace with hash -180528293, now seen corresponding path program 1 times [2023-11-23 21:30:07,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:07,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852785946] [2023-11-23 21:30:07,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:07,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 296 proven. 0 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2023-11-23 21:30:07,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:07,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852785946] [2023-11-23 21:30:07,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852785946] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:07,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:07,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:30:07,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581704939] [2023-11-23 21:30:07,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:07,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:30:07,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:07,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:30:07,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:30:07,543 INFO L87 Difference]: Start difference. First operand 937 states and 1318 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:07,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:07,723 INFO L93 Difference]: Finished difference Result 2208 states and 3201 transitions. [2023-11-23 21:30:07,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:30:07,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2023-11-23 21:30:07,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:07,730 INFO L225 Difference]: With dead ends: 2208 [2023-11-23 21:30:07,731 INFO L226 Difference]: Without dead ends: 1254 [2023-11-23 21:30:07,732 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 [2023-11-23 21:30:07,733 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 65 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:07,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 112 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:30:07,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2023-11-23 21:30:07,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 1201. [2023-11-23 21:30:07,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 1.455) internal successors, (1746), 1200 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:07,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1746 transitions. [2023-11-23 21:30:07,783 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1746 transitions. Word has length 187 [2023-11-23 21:30:07,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:07,783 INFO L495 AbstractCegarLoop]: Abstraction has 1201 states and 1746 transitions. [2023-11-23 21:30:07,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:07,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1746 transitions. [2023-11-23 21:30:07,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-11-23 21:30:07,788 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:07,788 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 11, 11, 9, 9, 7, 7, 6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:07,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:30:07,789 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:07,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:07,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1952061043, now seen corresponding path program 1 times [2023-11-23 21:30:07,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:07,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852866368] [2023-11-23 21:30:07,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:07,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:07,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 337 proven. 0 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2023-11-23 21:30:07,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:07,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852866368] [2023-11-23 21:30:07,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852866368] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:07,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:07,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:30:07,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074990657] [2023-11-23 21:30:07,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:07,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:30:07,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:07,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:30:07,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:30:07,920 INFO L87 Difference]: Start difference. First operand 1201 states and 1746 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:08,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:08,087 INFO L93 Difference]: Finished difference Result 2432 states and 3525 transitions. [2023-11-23 21:30:08,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:30:08,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2023-11-23 21:30:08,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:08,094 INFO L225 Difference]: With dead ends: 2432 [2023-11-23 21:30:08,094 INFO L226 Difference]: Without dead ends: 1222 [2023-11-23 21:30:08,096 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 [2023-11-23 21:30:08,097 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 66 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:08,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 109 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:30:08,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2023-11-23 21:30:08,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1189. [2023-11-23 21:30:08,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 1.4393939393939394) internal successors, (1710), 1188 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:08,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1710 transitions. [2023-11-23 21:30:08,133 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1710 transitions. Word has length 220 [2023-11-23 21:30:08,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:08,133 INFO L495 AbstractCegarLoop]: Abstraction has 1189 states and 1710 transitions. [2023-11-23 21:30:08,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:08,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1710 transitions. [2023-11-23 21:30:08,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2023-11-23 21:30:08,138 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:08,138 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 10, 10, 8, 8, 7, 7, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:08,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 21:30:08,138 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:08,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:08,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1123532406, now seen corresponding path program 1 times [2023-11-23 21:30:08,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:08,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718961631] [2023-11-23 21:30:08,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:08,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 249 proven. 0 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2023-11-23 21:30:08,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:08,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718961631] [2023-11-23 21:30:08,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718961631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:08,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:08,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:30:08,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256412677] [2023-11-23 21:30:08,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:08,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:30:08,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:08,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:30:08,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:30:08,393 INFO L87 Difference]: Start difference. First operand 1189 states and 1710 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:08,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:08,551 INFO L93 Difference]: Finished difference Result 2552 states and 3653 transitions. [2023-11-23 21:30:08,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:30:08,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2023-11-23 21:30:08,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:08,559 INFO L225 Difference]: With dead ends: 2552 [2023-11-23 21:30:08,559 INFO L226 Difference]: Without dead ends: 1366 [2023-11-23 21:30:08,562 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 [2023-11-23 21:30:08,563 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 40 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:08,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 140 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:30:08,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2023-11-23 21:30:08,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1273. [2023-11-23 21:30:08,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1272 states have (on average 1.4261006289308176) internal successors, (1814), 1272 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:08,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 1814 transitions. [2023-11-23 21:30:08,602 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 1814 transitions. Word has length 233 [2023-11-23 21:30:08,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:08,603 INFO L495 AbstractCegarLoop]: Abstraction has 1273 states and 1814 transitions. [2023-11-23 21:30:08,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:08,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 1814 transitions. [2023-11-23 21:30:08,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2023-11-23 21:30:08,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:08,609 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 10, 10, 8, 8, 7, 7, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:08,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 21:30:08,610 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:08,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:08,611 INFO L85 PathProgramCache]: Analyzing trace with hash -635326240, now seen corresponding path program 1 times [2023-11-23 21:30:08,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:08,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322127470] [2023-11-23 21:30:08,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:08,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 402 proven. 0 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2023-11-23 21:30:08,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:08,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322127470] [2023-11-23 21:30:08,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322127470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:08,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:08,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:30:08,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136894506] [2023-11-23 21:30:08,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:08,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:30:08,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:08,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:30:08,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:30:08,920 INFO L87 Difference]: Start difference. First operand 1273 states and 1814 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:09,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:09,092 INFO L93 Difference]: Finished difference Result 2568 states and 3653 transitions. [2023-11-23 21:30:09,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:30:09,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2023-11-23 21:30:09,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:09,101 INFO L225 Difference]: With dead ends: 2568 [2023-11-23 21:30:09,101 INFO L226 Difference]: Without dead ends: 1298 [2023-11-23 21:30:09,103 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 [2023-11-23 21:30:09,104 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 67 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:09,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 114 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:30:09,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2023-11-23 21:30:09,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1273. [2023-11-23 21:30:09,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1272 states have (on average 1.4072327044025157) internal successors, (1790), 1272 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:09,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 1790 transitions. [2023-11-23 21:30:09,169 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 1790 transitions. Word has length 255 [2023-11-23 21:30:09,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:09,169 INFO L495 AbstractCegarLoop]: Abstraction has 1273 states and 1790 transitions. [2023-11-23 21:30:09,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:30:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 1790 transitions. [2023-11-23 21:30:09,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2023-11-23 21:30:09,175 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:09,175 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 11, 11, 9, 9, 8, 8, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:09,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 21:30:09,175 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:09,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:09,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1335597486, now seen corresponding path program 1 times [2023-11-23 21:30:09,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:09,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509912943] [2023-11-23 21:30:09,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:09,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 437 proven. 11 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2023-11-23 21:30:09,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:09,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509912943] [2023-11-23 21:30:09,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509912943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:09,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073732775] [2023-11-23 21:30:09,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:09,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:09,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d5be9e-694b-4b64-a11a-98c5723da168/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:09,569 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d5be9e-694b-4b64-a11a-98c5723da168/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:09,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d5be9e-694b-4b64-a11a-98c5723da168/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:30:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:09,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:30:09,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 437 proven. 11 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2023-11-23 21:30:10,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 437 proven. 11 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2023-11-23 21:30:10,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073732775] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:30:10,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [13479670] [2023-11-23 21:30:10,243 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2023-11-23 21:30:10,243 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:30:10,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:30:10,244 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:30:10,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs