./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4f742293e1d7618171cf3a543c4629a6bee745f5c0d4fe8b828e91b8996c2b07 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:48:37,952 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:48:38,038 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:48:38,043 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:48:38,044 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:48:38,068 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:48:38,069 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:48:38,070 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:48:38,071 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:48:38,071 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:48:38,072 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:48:38,073 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:48:38,073 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:48:38,074 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:48:38,075 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:48:38,075 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:48:38,076 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:48:38,076 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:48:38,077 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:48:38,078 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:48:38,078 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:48:38,079 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:48:38,080 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:48:38,080 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:48:38,081 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:48:38,081 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:48:38,082 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:48:38,082 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:48:38,083 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:48:38,083 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:48:38,084 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:48:38,084 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:48:38,085 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:48:38,085 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:48:38,086 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:48:38,086 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:48:38,087 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:48:38,087 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:48:38,088 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:48:38,088 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:48:38,089 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:48:38,089 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:48:38,090 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:48:38,090 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:48:38,091 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:48:38,091 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_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f742293e1d7618171cf3a543c4629a6bee745f5c0d4fe8b828e91b8996c2b07 [2023-11-19 04:48:38,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:48:38,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:48:38,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:48:38,359 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:48:38,360 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:48:38,363 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-11-19 04:48:41,421 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:48:41,731 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:48:41,732 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-11-19 04:48:41,747 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/data/60bfc5c0b/fd8c0bc0a4bf43cb88f63b056fec92b7/FLAG5dfa05ed1 [2023-11-19 04:48:41,762 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/data/60bfc5c0b/fd8c0bc0a4bf43cb88f63b056fec92b7 [2023-11-19 04:48:41,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:48:41,767 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:48:41,768 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:48:41,769 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:48:41,774 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:48:41,775 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:48:41" (1/1) ... [2023-11-19 04:48:41,776 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@360c8f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:41, skipping insertion in model container [2023-11-19 04:48:41,777 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:48:41" (1/1) ... [2023-11-19 04:48:41,841 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:48:42,062 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_e94f714b-0636-4584-873e-cbc8c07c15d5/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7233,7246] [2023-11-19 04:48:42,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:48:42,133 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:48:42,186 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_e94f714b-0636-4584-873e-cbc8c07c15d5/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7233,7246] [2023-11-19 04:48:42,216 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:48:42,244 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:48:42,244 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:42 WrapperNode [2023-11-19 04:48:42,245 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:48:42,246 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:48:42,246 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:48:42,247 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:48:42,255 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:42" (1/1) ... [2023-11-19 04:48:42,269 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:42" (1/1) ... [2023-11-19 04:48:42,321 INFO L138 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 624 [2023-11-19 04:48:42,321 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:48:42,322 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:48:42,322 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:48:42,322 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:48:42,332 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:42" (1/1) ... [2023-11-19 04:48:42,333 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:42" (1/1) ... [2023-11-19 04:48:42,341 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:42" (1/1) ... [2023-11-19 04:48:42,343 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:42" (1/1) ... [2023-11-19 04:48:42,356 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:42" (1/1) ... [2023-11-19 04:48:42,378 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:42" (1/1) ... [2023-11-19 04:48:42,381 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:42" (1/1) ... [2023-11-19 04:48:42,385 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:42" (1/1) ... [2023-11-19 04:48:42,390 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:48:42,391 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:48:42,392 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:48:42,392 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:48:42,393 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:42" (1/1) ... [2023-11-19 04:48:42,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:48:42,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:42,430 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:48:42,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:48:42,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:48:42,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:48:42,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:48:42,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:48:42,667 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:48:42,669 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:48:43,412 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:48:43,672 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:48:43,672 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 04:48:43,678 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:48:43 BoogieIcfgContainer [2023-11-19 04:48:43,678 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:48:43,681 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:48:43,681 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:48:43,684 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:48:43,684 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:48:41" (1/3) ... [2023-11-19 04:48:43,685 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fba47b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:48:43, skipping insertion in model container [2023-11-19 04:48:43,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:42" (2/3) ... [2023-11-19 04:48:43,686 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fba47b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:48:43, skipping insertion in model container [2023-11-19 04:48:43,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:48:43" (3/3) ... [2023-11-19 04:48:43,688 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-11-19 04:48:43,707 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:48:43,708 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:48:43,818 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:48:43,826 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;@8147056, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:48:43,828 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:48:43,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 85 states have (on average 1.776470588235294) internal successors, (151), 92 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:43,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-19 04:48:43,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:43,848 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 04:48:43,848 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:43,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:43,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1203894572, now seen corresponding path program 1 times [2023-11-19 04:48:43,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:43,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511965965] [2023-11-19 04:48:43,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:43,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:48:44,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:44,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511965965] [2023-11-19 04:48:44,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511965965] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:44,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:44,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:44,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309242791] [2023-11-19 04:48:44,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:44,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:44,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:44,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:44,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:44,414 INFO L87 Difference]: Start difference. First operand has 93 states, 85 states have (on average 1.776470588235294) internal successors, (151), 92 states have internal predecessors, (151), 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 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) [2023-11-19 04:48:44,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:44,555 INFO L93 Difference]: Finished difference Result 209 states and 320 transitions. [2023-11-19 04:48:44,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:48:44,558 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 38 [2023-11-19 04:48:44,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:44,573 INFO L225 Difference]: With dead ends: 209 [2023-11-19 04:48:44,573 INFO L226 Difference]: Without dead ends: 129 [2023-11-19 04:48:44,577 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 [2023-11-19 04:48:44,581 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 93 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:44,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 325 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:44,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-19 04:48:44,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2023-11-19 04:48:44,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.4126984126984128) internal successors, (178), 126 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:44,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 178 transitions. [2023-11-19 04:48:44,656 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 178 transitions. Word has length 38 [2023-11-19 04:48:44,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:44,657 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 178 transitions. [2023-11-19 04:48:44,658 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) [2023-11-19 04:48:44,658 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 178 transitions. [2023-11-19 04:48:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-19 04:48:44,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:44,661 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 04:48:44,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:48:44,661 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:44,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:44,662 INFO L85 PathProgramCache]: Analyzing trace with hash -193135057, now seen corresponding path program 1 times [2023-11-19 04:48:44,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:44,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20332737] [2023-11-19 04:48:44,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:44,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:48:44,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:44,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20332737] [2023-11-19 04:48:44,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20332737] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:44,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:44,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:44,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741069472] [2023-11-19 04:48:44,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:44,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:44,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:44,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:44,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:44,903 INFO L87 Difference]: Start difference. First operand 127 states and 178 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:44,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:44,973 INFO L93 Difference]: Finished difference Result 282 states and 413 transitions. [2023-11-19 04:48:44,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:48:44,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-19 04:48:44,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:44,979 INFO L225 Difference]: With dead ends: 282 [2023-11-19 04:48:44,979 INFO L226 Difference]: Without dead ends: 184 [2023-11-19 04:48:44,985 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 [2023-11-19 04:48:44,987 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 77 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:44,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 184 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:48:44,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-19 04:48:45,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2023-11-19 04:48:45,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.430939226519337) internal successors, (259), 181 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:45,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 259 transitions. [2023-11-19 04:48:45,007 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 259 transitions. Word has length 40 [2023-11-19 04:48:45,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:45,008 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 259 transitions. [2023-11-19 04:48:45,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:45,008 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 259 transitions. [2023-11-19 04:48:45,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-19 04:48:45,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:45,010 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 04:48:45,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:48:45,011 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:45,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:45,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1952602460, now seen corresponding path program 1 times [2023-11-19 04:48:45,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:45,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892336818] [2023-11-19 04:48:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:45,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:48:45,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:45,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892336818] [2023-11-19 04:48:45,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892336818] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:45,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:45,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:45,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963731502] [2023-11-19 04:48:45,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:45,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:45,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:45,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:45,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:45,133 INFO L87 Difference]: Start difference. First operand 182 states and 259 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:45,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:45,168 INFO L93 Difference]: Finished difference Result 448 states and 658 transitions. [2023-11-19 04:48:45,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:48:45,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 42 [2023-11-19 04:48:45,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:45,171 INFO L225 Difference]: With dead ends: 448 [2023-11-19 04:48:45,171 INFO L226 Difference]: Without dead ends: 297 [2023-11-19 04:48:45,172 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 [2023-11-19 04:48:45,174 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 77 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:45,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 233 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:48:45,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-11-19 04:48:45,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 295. [2023-11-19 04:48:45,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.4489795918367347) internal successors, (426), 294 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:45,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 426 transitions. [2023-11-19 04:48:45,190 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 426 transitions. Word has length 42 [2023-11-19 04:48:45,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:45,191 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 426 transitions. [2023-11-19 04:48:45,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:45,191 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 426 transitions. [2023-11-19 04:48:45,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 04:48:45,193 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:45,193 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2023-11-19 04:48:45,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:48:45,193 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:45,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:45,194 INFO L85 PathProgramCache]: Analyzing trace with hash -129986801, now seen corresponding path program 1 times [2023-11-19 04:48:45,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:45,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519492045] [2023-11-19 04:48:45,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:45,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:48:45,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:45,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519492045] [2023-11-19 04:48:45,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519492045] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:45,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:45,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:45,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383993940] [2023-11-19 04:48:45,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:45,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:45,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:45,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:45,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:45,291 INFO L87 Difference]: Start difference. First operand 295 states and 426 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:45,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:45,325 INFO L93 Difference]: Finished difference Result 723 states and 1068 transitions. [2023-11-19 04:48:45,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:48:45,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 44 [2023-11-19 04:48:45,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:45,329 INFO L225 Difference]: With dead ends: 723 [2023-11-19 04:48:45,330 INFO L226 Difference]: Without dead ends: 459 [2023-11-19 04:48:45,333 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 [2023-11-19 04:48:45,342 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 76 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:45,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 201 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:48:45,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2023-11-19 04:48:45,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 457. [2023-11-19 04:48:45,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.4671052631578947) internal successors, (669), 456 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:45,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 669 transitions. [2023-11-19 04:48:45,377 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 669 transitions. Word has length 44 [2023-11-19 04:48:45,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:45,379 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 669 transitions. [2023-11-19 04:48:45,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:45,380 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 669 transitions. [2023-11-19 04:48:45,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 04:48:45,385 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:45,385 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2023-11-19 04:48:45,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:48:45,386 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:45,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:45,386 INFO L85 PathProgramCache]: Analyzing trace with hash 305400130, now seen corresponding path program 1 times [2023-11-19 04:48:45,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:45,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108834975] [2023-11-19 04:48:45,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:45,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:48:45,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:45,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108834975] [2023-11-19 04:48:45,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108834975] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:45,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:45,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:45,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110009111] [2023-11-19 04:48:45,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:45,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:45,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:45,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:45,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:45,519 INFO L87 Difference]: Start difference. First operand 457 states and 669 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:45,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:45,559 INFO L93 Difference]: Finished difference Result 1175 states and 1736 transitions. [2023-11-19 04:48:45,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:48:45,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 46 [2023-11-19 04:48:45,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:45,569 INFO L225 Difference]: With dead ends: 1175 [2023-11-19 04:48:45,569 INFO L226 Difference]: Without dead ends: 762 [2023-11-19 04:48:45,570 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 [2023-11-19 04:48:45,571 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 72 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:45,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 214 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:48:45,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2023-11-19 04:48:45,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 760. [2023-11-19 04:48:45,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 1.458498023715415) internal successors, (1107), 759 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:45,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1107 transitions. [2023-11-19 04:48:45,603 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1107 transitions. Word has length 46 [2023-11-19 04:48:45,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:45,603 INFO L495 AbstractCegarLoop]: Abstraction has 760 states and 1107 transitions. [2023-11-19 04:48:45,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:45,604 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1107 transitions. [2023-11-19 04:48:45,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-19 04:48:45,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:45,605 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2023-11-19 04:48:45,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:48:45,605 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:45,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:45,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1581532322, now seen corresponding path program 1 times [2023-11-19 04:48:45,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:45,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258155806] [2023-11-19 04:48:45,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:45,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:48:45,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:45,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258155806] [2023-11-19 04:48:45,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258155806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:45,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:45,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:45,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314209039] [2023-11-19 04:48:45,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:45,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:45,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:45,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:45,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:45,746 INFO L87 Difference]: Start difference. First operand 760 states and 1107 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:45,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:45,787 INFO L93 Difference]: Finished difference Result 1902 states and 2802 transitions. [2023-11-19 04:48:45,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:48:45,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-11-19 04:48:45,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:45,800 INFO L225 Difference]: With dead ends: 1902 [2023-11-19 04:48:45,800 INFO L226 Difference]: Without dead ends: 1186 [2023-11-19 04:48:45,802 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 [2023-11-19 04:48:45,803 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 71 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:45,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 203 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:48:45,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2023-11-19 04:48:45,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1184. [2023-11-19 04:48:45,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 1.466610312764159) internal successors, (1735), 1183 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:45,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1735 transitions. [2023-11-19 04:48:45,846 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1735 transitions. Word has length 48 [2023-11-19 04:48:45,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:45,847 INFO L495 AbstractCegarLoop]: Abstraction has 1184 states and 1735 transitions. [2023-11-19 04:48:45,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:45,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1735 transitions. [2023-11-19 04:48:45,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-19 04:48:45,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:45,849 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:45,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:48:45,850 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:45,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:45,851 INFO L85 PathProgramCache]: Analyzing trace with hash -256432369, now seen corresponding path program 1 times [2023-11-19 04:48:45,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:45,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189985157] [2023-11-19 04:48:45,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:45,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:45,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:48:46,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:46,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189985157] [2023-11-19 04:48:46,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189985157] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:46,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:46,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:48:46,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497773098] [2023-11-19 04:48:46,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:46,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:48:46,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:46,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:48:46,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:48:46,008 INFO L87 Difference]: Start difference. First operand 1184 states and 1735 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:46,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:46,208 INFO L93 Difference]: Finished difference Result 3012 states and 4441 transitions. [2023-11-19 04:48:46,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:48:46,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 50 [2023-11-19 04:48:46,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:46,219 INFO L225 Difference]: With dead ends: 3012 [2023-11-19 04:48:46,219 INFO L226 Difference]: Without dead ends: 1867 [2023-11-19 04:48:46,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:48:46,221 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 439 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:46,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 811 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:46,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2023-11-19 04:48:46,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1841. [2023-11-19 04:48:46,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.4728260869565217) internal successors, (2710), 1840 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:46,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2710 transitions. [2023-11-19 04:48:46,270 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2710 transitions. Word has length 50 [2023-11-19 04:48:46,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:46,270 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 2710 transitions. [2023-11-19 04:48:46,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:46,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2710 transitions. [2023-11-19 04:48:46,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-19 04:48:46,271 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:46,271 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:46,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:48:46,272 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:46,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:46,272 INFO L85 PathProgramCache]: Analyzing trace with hash 578026953, now seen corresponding path program 1 times [2023-11-19 04:48:46,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:46,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272737575] [2023-11-19 04:48:46,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:46,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:48:46,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:46,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272737575] [2023-11-19 04:48:46,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272737575] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:46,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:46,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:48:46,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779647240] [2023-11-19 04:48:46,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:46,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:48:46,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:46,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:48:46,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:48:46,388 INFO L87 Difference]: Start difference. First operand 1841 states and 2710 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:46,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:46,485 INFO L93 Difference]: Finished difference Result 3627 states and 5352 transitions. [2023-11-19 04:48:46,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:48:46,486 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 51 [2023-11-19 04:48:46,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:46,496 INFO L225 Difference]: With dead ends: 3627 [2023-11-19 04:48:46,496 INFO L226 Difference]: Without dead ends: 1843 [2023-11-19 04:48:46,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:48:46,500 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 145 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:46,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 297 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:46,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2023-11-19 04:48:46,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1838. [2023-11-19 04:48:46,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1837 states have (on average 1.467065868263473) internal successors, (2695), 1837 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:46,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 2695 transitions. [2023-11-19 04:48:46,550 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 2695 transitions. Word has length 51 [2023-11-19 04:48:46,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:46,551 INFO L495 AbstractCegarLoop]: Abstraction has 1838 states and 2695 transitions. [2023-11-19 04:48:46,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:46,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 2695 transitions. [2023-11-19 04:48:46,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-19 04:48:46,552 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:46,552 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:46,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 04:48:46,553 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:46,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:46,553 INFO L85 PathProgramCache]: Analyzing trace with hash 416534526, now seen corresponding path program 1 times [2023-11-19 04:48:46,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:46,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638248964] [2023-11-19 04:48:46,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:46,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:48:46,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:46,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638248964] [2023-11-19 04:48:46,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638248964] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:46,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:46,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:48:46,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439425351] [2023-11-19 04:48:46,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:46,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:48:46,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:46,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:48:46,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:48:46,864 INFO L87 Difference]: Start difference. First operand 1838 states and 2695 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:46,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:46,952 INFO L93 Difference]: Finished difference Result 3028 states and 4392 transitions. [2023-11-19 04:48:46,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:48:46,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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 59 [2023-11-19 04:48:46,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:46,969 INFO L225 Difference]: With dead ends: 3028 [2023-11-19 04:48:46,969 INFO L226 Difference]: Without dead ends: 3026 [2023-11-19 04:48:46,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:48:46,971 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 148 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:46,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 576 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:46,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2023-11-19 04:48:47,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 1882. [2023-11-19 04:48:47,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 1.443912812333865) internal successors, (2716), 1881 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:47,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2716 transitions. [2023-11-19 04:48:47,058 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2716 transitions. Word has length 59 [2023-11-19 04:48:47,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:47,059 INFO L495 AbstractCegarLoop]: Abstraction has 1882 states and 2716 transitions. [2023-11-19 04:48:47,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:47,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2716 transitions. [2023-11-19 04:48:47,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-19 04:48:47,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:47,060 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:47,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 04:48:47,061 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:47,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:47,061 INFO L85 PathProgramCache]: Analyzing trace with hash 19052562, now seen corresponding path program 1 times [2023-11-19 04:48:47,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:47,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031569727] [2023-11-19 04:48:47,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:47,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:48:48,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:48,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031569727] [2023-11-19 04:48:48,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031569727] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:48,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236851226] [2023-11-19 04:48:48,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:48,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:48,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:48,608 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:48,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:48:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:48,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 04:48:48,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:48:49,671 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:49,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236851226] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:49,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:48:49,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2023-11-19 04:48:49,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396138869] [2023-11-19 04:48:49,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:49,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:48:49,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:49,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:48:49,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-19 04:48:49,674 INFO L87 Difference]: Start difference. First operand 1882 states and 2716 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:49,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:49,829 INFO L93 Difference]: Finished difference Result 3520 states and 5073 transitions. [2023-11-19 04:48:49,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:48:49,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 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 67 [2023-11-19 04:48:49,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:49,838 INFO L225 Difference]: With dead ends: 3520 [2023-11-19 04:48:49,839 INFO L226 Difference]: Without dead ends: 1695 [2023-11-19 04:48:49,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-11-19 04:48:49,842 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 409 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:49,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 288 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:49,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2023-11-19 04:48:49,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 1293. [2023-11-19 04:48:49,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 1.445046439628483) internal successors, (1867), 1292 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:49,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 1867 transitions. [2023-11-19 04:48:49,880 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 1867 transitions. Word has length 67 [2023-11-19 04:48:49,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:49,880 INFO L495 AbstractCegarLoop]: Abstraction has 1293 states and 1867 transitions. [2023-11-19 04:48:49,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:49,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 1867 transitions. [2023-11-19 04:48:49,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-19 04:48:49,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:49,882 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:49,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 04:48:50,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:50,096 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:50,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:50,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1112163948, now seen corresponding path program 1 times [2023-11-19 04:48:50,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:50,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955854894] [2023-11-19 04:48:50,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:50,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:48:51,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:51,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955854894] [2023-11-19 04:48:51,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955854894] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:51,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300103277] [2023-11-19 04:48:51,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:51,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:51,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:51,603 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:51,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:48:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:51,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 04:48:51,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 04:48:52,315 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:52,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300103277] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:52,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:48:52,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2023-11-19 04:48:52,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215599397] [2023-11-19 04:48:52,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:52,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:48:52,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:52,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:48:52,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-19 04:48:52,318 INFO L87 Difference]: Start difference. First operand 1293 states and 1867 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 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) [2023-11-19 04:48:52,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:52,442 INFO L93 Difference]: Finished difference Result 2807 states and 4047 transitions. [2023-11-19 04:48:52,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:48:52,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 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 70 [2023-11-19 04:48:52,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:52,451 INFO L225 Difference]: With dead ends: 2807 [2023-11-19 04:48:52,451 INFO L226 Difference]: Without dead ends: 1578 [2023-11-19 04:48:52,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-11-19 04:48:52,454 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 367 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:52,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 313 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:52,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2023-11-19 04:48:52,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1293. [2023-11-19 04:48:52,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 1.434984520123839) internal successors, (1854), 1292 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:52,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 1854 transitions. [2023-11-19 04:48:52,490 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 1854 transitions. Word has length 70 [2023-11-19 04:48:52,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:52,490 INFO L495 AbstractCegarLoop]: Abstraction has 1293 states and 1854 transitions. [2023-11-19 04:48:52,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 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) [2023-11-19 04:48:52,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 1854 transitions. [2023-11-19 04:48:52,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-19 04:48:52,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:52,491 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:52,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:52,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:52,711 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:52,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:52,711 INFO L85 PathProgramCache]: Analyzing trace with hash 605818712, now seen corresponding path program 1 times [2023-11-19 04:48:52,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:52,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515578102] [2023-11-19 04:48:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:52,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:48:53,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:53,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515578102] [2023-11-19 04:48:53,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515578102] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:53,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434226150] [2023-11-19 04:48:53,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:53,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:53,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:53,953 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:53,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:48:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:54,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 04:48:54,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 04:48:54,642 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:54,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434226150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:54,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:48:54,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2023-11-19 04:48:54,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042487580] [2023-11-19 04:48:54,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:54,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:48:54,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:54,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:48:54,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-19 04:48:54,645 INFO L87 Difference]: Start difference. First operand 1293 states and 1854 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 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) [2023-11-19 04:48:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:54,834 INFO L93 Difference]: Finished difference Result 4032 states and 5792 transitions. [2023-11-19 04:48:54,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:48:54,834 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 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 70 [2023-11-19 04:48:54,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:54,849 INFO L225 Difference]: With dead ends: 4032 [2023-11-19 04:48:54,849 INFO L226 Difference]: Without dead ends: 2803 [2023-11-19 04:48:54,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-11-19 04:48:54,852 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 391 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:54,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 415 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:54,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2023-11-19 04:48:54,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 2357. [2023-11-19 04:48:54,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2357 states, 2356 states have (on average 1.4342105263157894) internal successors, (3379), 2356 states have internal predecessors, (3379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 3379 transitions. [2023-11-19 04:48:54,920 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 3379 transitions. Word has length 70 [2023-11-19 04:48:54,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:54,921 INFO L495 AbstractCegarLoop]: Abstraction has 2357 states and 3379 transitions. [2023-11-19 04:48:54,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 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) [2023-11-19 04:48:54,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 3379 transitions. [2023-11-19 04:48:54,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-19 04:48:54,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:54,925 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:54,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:55,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:55,141 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:55,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:55,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1090475469, now seen corresponding path program 1 times [2023-11-19 04:48:55,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:55,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214705644] [2023-11-19 04:48:55,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:55,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:48:55,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:55,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214705644] [2023-11-19 04:48:55,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214705644] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:55,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:55,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:48:55,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750844227] [2023-11-19 04:48:55,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:55,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:48:55,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:55,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:48:55,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:48:55,304 INFO L87 Difference]: Start difference. First operand 2357 states and 3379 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:55,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:55,403 INFO L93 Difference]: Finished difference Result 4679 states and 6720 transitions. [2023-11-19 04:48:55,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:48:55,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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 73 [2023-11-19 04:48:55,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:55,417 INFO L225 Difference]: With dead ends: 4679 [2023-11-19 04:48:55,418 INFO L226 Difference]: Without dead ends: 2357 [2023-11-19 04:48:55,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:48:55,423 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 281 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:55,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 99 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:55,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2023-11-19 04:48:55,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2357. [2023-11-19 04:48:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2357 states, 2356 states have (on average 1.4028013582342955) internal successors, (3305), 2356 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:55,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 3305 transitions. [2023-11-19 04:48:55,492 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 3305 transitions. Word has length 73 [2023-11-19 04:48:55,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:55,492 INFO L495 AbstractCegarLoop]: Abstraction has 2357 states and 3305 transitions. [2023-11-19 04:48:55,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:55,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 3305 transitions. [2023-11-19 04:48:55,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-19 04:48:55,493 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:55,494 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:55,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 04:48:55,494 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:55,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:55,494 INFO L85 PathProgramCache]: Analyzing trace with hash 22930056, now seen corresponding path program 1 times [2023-11-19 04:48:55,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:55,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030892834] [2023-11-19 04:48:55,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:55,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:48:56,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:56,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030892834] [2023-11-19 04:48:56,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030892834] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:56,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527730897] [2023-11-19 04:48:56,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:56,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:56,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:56,725 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:56,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:48:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:56,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 04:48:56,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:48:57,494 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:48:57,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527730897] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:57,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:48:57,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2023-11-19 04:48:57,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046812395] [2023-11-19 04:48:57,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:57,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:48:57,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:57,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:48:57,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-19 04:48:57,496 INFO L87 Difference]: Start difference. First operand 2357 states and 3305 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:57,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:57,634 INFO L93 Difference]: Finished difference Result 7205 states and 10083 transitions. [2023-11-19 04:48:57,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:48:57,634 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 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 73 [2023-11-19 04:48:57,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:57,659 INFO L225 Difference]: With dead ends: 7205 [2023-11-19 04:48:57,659 INFO L226 Difference]: Without dead ends: 4947 [2023-11-19 04:48:57,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-11-19 04:48:57,663 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 432 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:57,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 358 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:48:57,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4947 states. [2023-11-19 04:48:57,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4947 to 4539. [2023-11-19 04:48:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4539 states, 4538 states have (on average 1.3953283384750992) internal successors, (6332), 4538 states have internal predecessors, (6332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 6332 transitions. [2023-11-19 04:48:57,823 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 6332 transitions. Word has length 73 [2023-11-19 04:48:57,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:57,823 INFO L495 AbstractCegarLoop]: Abstraction has 4539 states and 6332 transitions. [2023-11-19 04:48:57,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:57,824 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 6332 transitions. [2023-11-19 04:48:57,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-19 04:48:57,825 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:57,826 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-19 04:48:57,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:58,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:58,041 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:58,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:58,041 INFO L85 PathProgramCache]: Analyzing trace with hash -935330900, now seen corresponding path program 1 times [2023-11-19 04:48:58,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:58,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152646920] [2023-11-19 04:48:58,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:58,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:59,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:48:59,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:59,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152646920] [2023-11-19 04:48:59,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152646920] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:59,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799769031] [2023-11-19 04:48:59,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:59,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:59,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:59,433 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:59,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94f714b-0636-4584-873e-cbc8c07c15d5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:48:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:59,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-19 04:48:59,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:49:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:49:00,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:49:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:49:06,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799769031] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:49:06,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1488438825] [2023-11-19 04:49:06,932 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2023-11-19 04:49:06,933 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:49:06,937 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:49:06,944 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:49:06,944 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:49:08,837 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2023-11-19 04:49:20,993 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 262144 conjunctions. This might take some time...