./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.05.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3cc9d5-efe1-4210-8b19-aada3f333cd0/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3cc9d5-efe1-4210-8b19-aada3f333cd0/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3cc9d5-efe1-4210-8b19-aada3f333cd0/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3cc9d5-efe1-4210-8b19-aada3f333cd0/bin/utaipan-verify-FOvIYxoinp/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.05.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3cc9d5-efe1-4210-8b19-aada3f333cd0/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3cc9d5-efe1-4210-8b19-aada3f333cd0/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --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 d8722862ca37b1ee13dec8b9e420cd40ba7901837b8f3b6258499da6e8a2ca6f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:31:41,194 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:31:41,270 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3cc9d5-efe1-4210-8b19-aada3f333cd0/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-06 20:31:41,276 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:31:41,276 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:31:41,305 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:31:41,305 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:31:41,306 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:31:41,307 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:31:41,308 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:31:41,308 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:31:41,309 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:31:41,310 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:31:41,310 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:31:41,311 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:31:41,311 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:31:41,312 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:31:41,312 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:31:41,313 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:31:41,314 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:31:41,314 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:31:41,316 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:31:41,316 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:31:41,317 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 20:31:41,318 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:31:41,318 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:31:41,319 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:31:41,319 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:31:41,320 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 20:31:41,320 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:31:41,321 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 20:31:41,322 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:31:41,322 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 20:31:41,322 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:31:41,322 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:31:41,323 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:31:41,323 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:31:41,323 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:31:41,324 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:31:41,324 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 20:31:41,324 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:31:41,325 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:31:41,325 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 20:31:41,326 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:31:41,326 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:31:41,326 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_6b3cc9d5-efe1-4210-8b19-aada3f333cd0/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3cc9d5-efe1-4210-8b19-aada3f333cd0/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8722862ca37b1ee13dec8b9e420cd40ba7901837b8f3b6258499da6e8a2ca6f [2023-11-06 20:31:41,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:31:41,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:31:41,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:31:41,670 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:31:41,671 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:31:41,673 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3cc9d5-efe1-4210-8b19-aada3f333cd0/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/systemc/transmitter.05.cil.c [2023-11-06 20:31:44,823 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:31:45,038 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:31:45,039 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3cc9d5-efe1-4210-8b19-aada3f333cd0/sv-benchmarks/c/systemc/transmitter.05.cil.c [2023-11-06 20:31:45,053 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3cc9d5-efe1-4210-8b19-aada3f333cd0/bin/utaipan-verify-FOvIYxoinp/data/8df01e05f/303ef76f800e483d859ddd640ddc8e4a/FLAGff806c078 [2023-11-06 20:31:45,069 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3cc9d5-efe1-4210-8b19-aada3f333cd0/bin/utaipan-verify-FOvIYxoinp/data/8df01e05f/303ef76f800e483d859ddd640ddc8e4a [2023-11-06 20:31:45,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:31:45,073 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:31:45,075 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:31:45,075 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:31:45,081 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:31:45,081 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:31:45" (1/1) ... [2023-11-06 20:31:45,083 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16d0f357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:45, skipping insertion in model container [2023-11-06 20:31:45,083 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:31:45" (1/1) ... [2023-11-06 20:31:45,127 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:31:45,280 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_6b3cc9d5-efe1-4210-8b19-aada3f333cd0/sv-benchmarks/c/systemc/transmitter.05.cil.c[706,719] [2023-11-06 20:31:45,403 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:31:45,422 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:31:45,436 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_6b3cc9d5-efe1-4210-8b19-aada3f333cd0/sv-benchmarks/c/systemc/transmitter.05.cil.c[706,719] [2023-11-06 20:31:45,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:31:45,500 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:31:45,500 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:45 WrapperNode [2023-11-06 20:31:45,500 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:31:45,502 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:31:45,502 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:31:45,502 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:31:45,511 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:45" (1/1) ... [2023-11-06 20:31:45,524 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:45" (1/1) ... [2023-11-06 20:31:45,560 INFO L138 Inliner]: procedures = 38, calls = 45, calls flagged for inlining = 22, calls inlined = 22, statements flattened = 446 [2023-11-06 20:31:45,560 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:31:45,561 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:31:45,561 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:31:45,561 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:31:45,573 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:45" (1/1) ... [2023-11-06 20:31:45,573 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:45" (1/1) ... [2023-11-06 20:31:45,578 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:45" (1/1) ... [2023-11-06 20:31:45,578 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:45" (1/1) ... [2023-11-06 20:31:45,588 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:45" (1/1) ... [2023-11-06 20:31:45,609 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:45" (1/1) ... [2023-11-06 20:31:45,612 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:45" (1/1) ... [2023-11-06 20:31:45,615 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:45" (1/1) ... [2023-11-06 20:31:45,635 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:31:45,636 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:31:45,636 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:31:45,637 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:31:45,637 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:45" (1/1) ... [2023-11-06 20:31:45,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:31:45,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3cc9d5-efe1-4210-8b19-aada3f333cd0/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:31:45,682 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3cc9d5-efe1-4210-8b19-aada3f333cd0/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:31:45,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3cc9d5-efe1-4210-8b19-aada3f333cd0/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:31:45,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:31:45,724 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-06 20:31:45,724 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-06 20:31:45,725 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-06 20:31:45,725 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-06 20:31:45,725 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-06 20:31:45,725 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-06 20:31:45,725 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-06 20:31:45,725 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-06 20:31:45,726 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-06 20:31:45,726 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-06 20:31:45,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 20:31:45,726 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-06 20:31:45,726 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-06 20:31:45,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:31:45,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:31:45,818 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:31:45,820 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:31:46,385 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:31:46,721 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:31:46,721 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-06 20:31:46,725 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:31:46 BoogieIcfgContainer [2023-11-06 20:31:46,725 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:31:46,732 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:31:46,733 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:31:46,737 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:31:46,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:31:45" (1/3) ... [2023-11-06 20:31:46,738 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f8668c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:31:46, skipping insertion in model container [2023-11-06 20:31:46,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:45" (2/3) ... [2023-11-06 20:31:46,741 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f8668c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:31:46, skipping insertion in model container [2023-11-06 20:31:46,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:31:46" (3/3) ... [2023-11-06 20:31:46,743 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.05.cil.c [2023-11-06 20:31:46,765 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:31:46,766 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 20:31:46,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:31:46,838 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=LoopsAndPotentialCycles, 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;@517902d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:31:46,839 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 20:31:46,845 INFO L276 IsEmpty]: Start isEmpty. Operand has 115 states, 89 states have (on average 1.4943820224719102) internal successors, (133), 91 states have internal predecessors, (133), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-06 20:31:46,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-06 20:31:46,880 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:46,881 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] [2023-11-06 20:31:46,881 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:31:46,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:46,891 INFO L85 PathProgramCache]: Analyzing trace with hash -593551298, now seen corresponding path program 1 times [2023-11-06 20:31:46,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:46,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088747181] [2023-11-06 20:31:46,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:46,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:47,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:31:47,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:47,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088747181] [2023-11-06 20:31:47,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088747181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:47,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:47,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:31:47,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992725485] [2023-11-06 20:31:47,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:47,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:31:47,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:47,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:31:47,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:31:47,466 INFO L87 Difference]: Start difference. First operand has 115 states, 89 states have (on average 1.4943820224719102) internal successors, (133), 91 states have internal predecessors, (133), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 20:31:47,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:47,850 INFO L93 Difference]: Finished difference Result 328 states and 495 transitions. [2023-11-06 20:31:47,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:31:47,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2023-11-06 20:31:47,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:47,864 INFO L225 Difference]: With dead ends: 328 [2023-11-06 20:31:47,865 INFO L226 Difference]: Without dead ends: 214 [2023-11-06 20:31:47,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:31:47,874 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 280 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:47,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 430 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:31:47,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-06 20:31:47,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 211. [2023-11-06 20:31:47,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 167 states have (on average 1.4131736526946108) internal successors, (236), 168 states have internal predecessors, (236), 31 states have call successors, (31), 12 states have call predecessors, (31), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-06 20:31:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 298 transitions. [2023-11-06 20:31:47,962 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 298 transitions. Word has length 49 [2023-11-06 20:31:47,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:47,962 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 298 transitions. [2023-11-06 20:31:47,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 20:31:47,963 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 298 transitions. [2023-11-06 20:31:47,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-06 20:31:47,966 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:47,966 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] [2023-11-06 20:31:47,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:31:47,967 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:31:47,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:47,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1550479681, now seen corresponding path program 1 times [2023-11-06 20:31:47,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:47,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597627429] [2023-11-06 20:31:47,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:47,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:48,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:31:48,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:48,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597627429] [2023-11-06 20:31:48,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597627429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:48,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:48,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 20:31:48,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744325064] [2023-11-06 20:31:48,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:48,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:31:48,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:48,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:31:48,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:31:48,160 INFO L87 Difference]: Start difference. First operand 211 states and 298 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 20:31:48,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:48,720 INFO L93 Difference]: Finished difference Result 713 states and 1013 transitions. [2023-11-06 20:31:48,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:31:48,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2023-11-06 20:31:48,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:48,731 INFO L225 Difference]: With dead ends: 713 [2023-11-06 20:31:48,732 INFO L226 Difference]: Without dead ends: 488 [2023-11-06 20:31:48,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:31:48,744 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 558 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:48,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 647 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 20:31:48,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2023-11-06 20:31:48,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 476. [2023-11-06 20:31:48,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 387 states have (on average 1.4056847545219637) internal successors, (544), 384 states have internal predecessors, (544), 60 states have call successors, (60), 26 states have call predecessors, (60), 28 states have return successors, (66), 66 states have call predecessors, (66), 60 states have call successors, (66) [2023-11-06 20:31:48,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 670 transitions. [2023-11-06 20:31:48,822 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 670 transitions. Word has length 49 [2023-11-06 20:31:48,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:48,822 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 670 transitions. [2023-11-06 20:31:48,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 20:31:48,823 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 670 transitions. [2023-11-06 20:31:48,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-06 20:31:48,825 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:48,825 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] [2023-11-06 20:31:48,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 20:31:48,826 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:31:48,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:48,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1167929856, now seen corresponding path program 1 times [2023-11-06 20:31:48,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:48,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683505601] [2023-11-06 20:31:48,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:48,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:31:48,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:48,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683505601] [2023-11-06 20:31:48,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683505601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:48,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:48,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 20:31:48,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757035042] [2023-11-06 20:31:48,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:48,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:31:48,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:48,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:31:48,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:31:48,950 INFO L87 Difference]: Start difference. First operand 476 states and 670 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 20:31:49,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:49,522 INFO L93 Difference]: Finished difference Result 1645 states and 2336 transitions. [2023-11-06 20:31:49,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:31:49,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2023-11-06 20:31:49,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:49,532 INFO L225 Difference]: With dead ends: 1645 [2023-11-06 20:31:49,532 INFO L226 Difference]: Without dead ends: 1139 [2023-11-06 20:31:49,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:31:49,536 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 558 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:49,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 500 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 20:31:49,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2023-11-06 20:31:49,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 887. [2023-11-06 20:31:49,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 722 states have (on average 1.4044321329639888) internal successors, (1014), 720 states have internal predecessors, (1014), 108 states have call successors, (108), 50 states have call predecessors, (108), 56 states have return successors, (125), 117 states have call predecessors, (125), 108 states have call successors, (125) [2023-11-06 20:31:49,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1247 transitions. [2023-11-06 20:31:49,631 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1247 transitions. Word has length 49 [2023-11-06 20:31:49,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:49,632 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1247 transitions. [2023-11-06 20:31:49,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 20:31:49,633 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1247 transitions. [2023-11-06 20:31:49,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-06 20:31:49,635 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:49,635 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] [2023-11-06 20:31:49,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 20:31:49,636 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:31:49,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:49,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1110785631, now seen corresponding path program 1 times [2023-11-06 20:31:49,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:49,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321307175] [2023-11-06 20:31:49,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:49,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:31:49,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:49,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321307175] [2023-11-06 20:31:49,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321307175] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:49,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:49,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 20:31:49,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644087528] [2023-11-06 20:31:49,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:49,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:31:49,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:49,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:31:49,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:31:49,795 INFO L87 Difference]: Start difference. First operand 887 states and 1247 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 20:31:50,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:50,444 INFO L93 Difference]: Finished difference Result 3016 states and 4301 transitions. [2023-11-06 20:31:50,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:31:50,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2023-11-06 20:31:50,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:50,462 INFO L225 Difference]: With dead ends: 3016 [2023-11-06 20:31:50,463 INFO L226 Difference]: Without dead ends: 2068 [2023-11-06 20:31:50,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:31:50,469 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 560 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:50,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 498 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 20:31:50,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2023-11-06 20:31:50,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1691. [2023-11-06 20:31:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1370 states have (on average 1.397080291970803) internal successors, (1914), 1372 states have internal predecessors, (1914), 208 states have call successors, (208), 98 states have call predecessors, (208), 112 states have return successors, (249), 221 states have call predecessors, (249), 208 states have call successors, (249) [2023-11-06 20:31:50,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 2371 transitions. [2023-11-06 20:31:50,685 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 2371 transitions. Word has length 49 [2023-11-06 20:31:50,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:50,687 INFO L495 AbstractCegarLoop]: Abstraction has 1691 states and 2371 transitions. [2023-11-06 20:31:50,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 20:31:50,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 2371 transitions. [2023-11-06 20:31:50,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-06 20:31:50,696 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:50,696 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:50,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 20:31:50,697 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:31:50,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:50,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1457531928, now seen corresponding path program 1 times [2023-11-06 20:31:50,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:50,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291548256] [2023-11-06 20:31:50,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:50,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 20:31:50,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:50,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291548256] [2023-11-06 20:31:50,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291548256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:50,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:50,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 20:31:50,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262502664] [2023-11-06 20:31:50,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:50,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:31:50,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:50,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:31:50,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:31:50,998 INFO L87 Difference]: Start difference. First operand 1691 states and 2371 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 20:31:51,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:51,628 INFO L93 Difference]: Finished difference Result 4771 states and 6717 transitions. [2023-11-06 20:31:51,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 20:31:51,629 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2023-11-06 20:31:51,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:51,652 INFO L225 Difference]: With dead ends: 4771 [2023-11-06 20:31:51,653 INFO L226 Difference]: Without dead ends: 3086 [2023-11-06 20:31:51,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-06 20:31:51,660 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 430 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:51,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 358 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:31:51,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3086 states. [2023-11-06 20:31:51,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3086 to 2790. [2023-11-06 20:31:51,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2790 states, 2281 states have (on average 1.387110916264796) internal successors, (3164), 2284 states have internal predecessors, (3164), 316 states have call successors, (316), 164 states have call predecessors, (316), 192 states have return successors, (398), 342 states have call predecessors, (398), 316 states have call successors, (398) [2023-11-06 20:31:51,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 3878 transitions. [2023-11-06 20:31:51,990 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 3878 transitions. Word has length 65 [2023-11-06 20:31:51,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:51,991 INFO L495 AbstractCegarLoop]: Abstraction has 2790 states and 3878 transitions. [2023-11-06 20:31:51,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 20:31:51,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 3878 transitions. [2023-11-06 20:31:51,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-06 20:31:51,994 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:51,994 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:51,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 20:31:51,995 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:31:51,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:51,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1401901812, now seen corresponding path program 1 times [2023-11-06 20:31:51,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:51,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905510155] [2023-11-06 20:31:51,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:51,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 20:31:52,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:52,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905510155] [2023-11-06 20:31:52,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905510155] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:52,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:52,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 20:31:52,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923696697] [2023-11-06 20:31:52,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:52,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:31:52,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:52,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:31:52,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:31:52,220 INFO L87 Difference]: Start difference. First operand 2790 states and 3878 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 20:31:53,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:53,206 INFO L93 Difference]: Finished difference Result 9040 states and 12594 transitions. [2023-11-06 20:31:53,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 20:31:53,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 69 [2023-11-06 20:31:53,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:53,255 INFO L225 Difference]: With dead ends: 9040 [2023-11-06 20:31:53,256 INFO L226 Difference]: Without dead ends: 6256 [2023-11-06 20:31:53,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-06 20:31:53,267 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 427 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:53,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 418 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:31:53,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6256 states. [2023-11-06 20:31:53,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6256 to 5418. [2023-11-06 20:31:53,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5418 states, 4429 states have (on average 1.3757055768796569) internal successors, (6093), 4436 states have internal predecessors, (6093), 604 states have call successors, (604), 328 states have call predecessors, (604), 384 states have return successors, (754), 654 states have call predecessors, (754), 604 states have call successors, (754) [2023-11-06 20:31:53,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5418 states to 5418 states and 7451 transitions. [2023-11-06 20:31:53,930 INFO L78 Accepts]: Start accepts. Automaton has 5418 states and 7451 transitions. Word has length 69 [2023-11-06 20:31:53,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:53,931 INFO L495 AbstractCegarLoop]: Abstraction has 5418 states and 7451 transitions. [2023-11-06 20:31:53,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 20:31:53,932 INFO L276 IsEmpty]: Start isEmpty. Operand 5418 states and 7451 transitions. [2023-11-06 20:31:53,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-06 20:31:53,937 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:53,939 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:53,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 20:31:53,939 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:31:53,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:53,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1965462942, now seen corresponding path program 1 times [2023-11-06 20:31:53,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:53,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856911182] [2023-11-06 20:31:53,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:53,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:54,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 20:31:54,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:54,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856911182] [2023-11-06 20:31:54,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856911182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:54,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:54,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 20:31:54,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212614239] [2023-11-06 20:31:54,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:54,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:31:54,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:54,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:31:54,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:31:54,165 INFO L87 Difference]: Start difference. First operand 5418 states and 7451 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 20:31:55,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:55,324 INFO L93 Difference]: Finished difference Result 14118 states and 19455 transitions. [2023-11-06 20:31:55,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 20:31:55,325 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 73 [2023-11-06 20:31:55,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:55,396 INFO L225 Difference]: With dead ends: 14118 [2023-11-06 20:31:55,397 INFO L226 Difference]: Without dead ends: 8706 [2023-11-06 20:31:55,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-06 20:31:55,418 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 398 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:55,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 426 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:31:55,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8706 states. [2023-11-06 20:31:56,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8706 to 8040. [2023-11-06 20:31:56,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8040 states, 6563 states have (on average 1.3650769465183605) internal successors, (8959), 6564 states have internal predecessors, (8959), 900 states have call successors, (900), 496 states have call predecessors, (900), 576 states have return successors, (1108), 980 states have call predecessors, (1108), 900 states have call successors, (1108) [2023-11-06 20:31:56,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8040 states to 8040 states and 10967 transitions. [2023-11-06 20:31:56,443 INFO L78 Accepts]: Start accepts. Automaton has 8040 states and 10967 transitions. Word has length 73 [2023-11-06 20:31:56,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:56,444 INFO L495 AbstractCegarLoop]: Abstraction has 8040 states and 10967 transitions. [2023-11-06 20:31:56,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 20:31:56,444 INFO L276 IsEmpty]: Start isEmpty. Operand 8040 states and 10967 transitions. [2023-11-06 20:31:56,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-06 20:31:56,449 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:56,450 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:56,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 20:31:56,450 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:31:56,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:56,451 INFO L85 PathProgramCache]: Analyzing trace with hash 413464321, now seen corresponding path program 1 times [2023-11-06 20:31:56,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:56,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566013785] [2023-11-06 20:31:56,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:56,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:56,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 20:31:56,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:56,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566013785] [2023-11-06 20:31:56,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566013785] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:56,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:56,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 20:31:56,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179631105] [2023-11-06 20:31:56,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:56,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:31:56,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:56,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:31:56,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:31:56,655 INFO L87 Difference]: Start difference. First operand 8040 states and 10967 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 20:31:58,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:58,486 INFO L93 Difference]: Finished difference Result 20802 states and 28425 transitions. [2023-11-06 20:31:58,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 20:31:58,487 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 77 [2023-11-06 20:31:58,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:58,593 INFO L225 Difference]: With dead ends: 20802 [2023-11-06 20:31:58,594 INFO L226 Difference]: Without dead ends: 12768 [2023-11-06 20:31:58,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-06 20:31:58,628 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 394 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:58,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 415 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:31:58,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12768 states. [2023-11-06 20:32:00,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12768 to 11990. [2023-11-06 20:32:00,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11990 states, 9779 states have (on average 1.3540239288270783) internal successors, (13241), 9764 states have internal predecessors, (13241), 1346 states have call successors, (1346), 752 states have call predecessors, (1346), 864 states have return successors, (1630), 1474 states have call predecessors, (1630), 1346 states have call successors, (1630) [2023-11-06 20:32:00,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11990 states to 11990 states and 16217 transitions. [2023-11-06 20:32:00,269 INFO L78 Accepts]: Start accepts. Automaton has 11990 states and 16217 transitions. Word has length 77 [2023-11-06 20:32:00,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:00,269 INFO L495 AbstractCegarLoop]: Abstraction has 11990 states and 16217 transitions. [2023-11-06 20:32:00,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 20:32:00,270 INFO L276 IsEmpty]: Start isEmpty. Operand 11990 states and 16217 transitions. [2023-11-06 20:32:00,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-06 20:32:00,280 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:00,280 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:32:00,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 20:32:00,281 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:00,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:00,281 INFO L85 PathProgramCache]: Analyzing trace with hash 771105088, now seen corresponding path program 1 times [2023-11-06 20:32:00,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:00,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623460123] [2023-11-06 20:32:00,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:00,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:00,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 20:32:00,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:00,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623460123] [2023-11-06 20:32:00,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623460123] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:32:00,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717899794] [2023-11-06 20:32:00,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:00,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:32:00,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3cc9d5-efe1-4210-8b19-aada3f333cd0/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:32:00,527 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3cc9d5-efe1-4210-8b19-aada3f333cd0/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:32:00,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3cc9d5-efe1-4210-8b19-aada3f333cd0/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 20:32:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:00,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 20:32:00,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:32:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:32:00,785 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:32:00,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717899794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:32:00,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 20:32:00,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-06 20:32:00,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147503874] [2023-11-06 20:32:00,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:32:00,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:32:00,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:00,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:32:00,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:32:00,787 INFO L87 Difference]: Start difference. First operand 11990 states and 16217 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 20:32:02,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:02,576 INFO L93 Difference]: Finished difference Result 23119 states and 31617 transitions. [2023-11-06 20:32:02,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:32:02,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 81 [2023-11-06 20:32:02,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:02,666 INFO L225 Difference]: With dead ends: 23119 [2023-11-06 20:32:02,667 INFO L226 Difference]: Without dead ends: 16293 [2023-11-06 20:32:02,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:32:02,695 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 97 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:02,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 367 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:32:02,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16293 states. [2023-11-06 20:32:04,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16293 to 13550. [2023-11-06 20:32:04,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13550 states, 11231 states have (on average 1.363102128038465) internal successors, (15309), 11216 states have internal predecessors, (15309), 1400 states have call successors, (1400), 806 states have call predecessors, (1400), 918 states have return successors, (1684), 1528 states have call predecessors, (1684), 1400 states have call successors, (1684) [2023-11-06 20:32:04,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13550 states to 13550 states and 18393 transitions. [2023-11-06 20:32:04,637 INFO L78 Accepts]: Start accepts. Automaton has 13550 states and 18393 transitions. Word has length 81 [2023-11-06 20:32:04,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:04,638 INFO L495 AbstractCegarLoop]: Abstraction has 13550 states and 18393 transitions. [2023-11-06 20:32:04,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 20:32:04,639 INFO L276 IsEmpty]: Start isEmpty. Operand 13550 states and 18393 transitions. [2023-11-06 20:32:04,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-06 20:32:04,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:04,648 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:32:04,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3cc9d5-efe1-4210-8b19-aada3f333cd0/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 20:32:04,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b3cc9d5-efe1-4210-8b19-aada3f333cd0/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 20:32:04,854 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:04,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:04,855 INFO L85 PathProgramCache]: Analyzing trace with hash -148638939, now seen corresponding path program 1 times [2023-11-06 20:32:04,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:04,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832593573] [2023-11-06 20:32:04,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:04,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:04,927 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-06 20:32:04,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:04,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832593573] [2023-11-06 20:32:04,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832593573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:32:04,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:32:04,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:32:04,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106755955] [2023-11-06 20:32:04,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:32:04,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:32:04,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:04,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:32:04,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:32:04,930 INFO L87 Difference]: Start difference. First operand 13550 states and 18393 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-06 20:32:06,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:06,398 INFO L93 Difference]: Finished difference Result 23681 states and 32272 transitions. [2023-11-06 20:32:06,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:32:06,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 86 [2023-11-06 20:32:06,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:06,458 INFO L225 Difference]: With dead ends: 23681 [2023-11-06 20:32:06,458 INFO L226 Difference]: Without dead ends: 14520 [2023-11-06 20:32:06,486 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 [2023-11-06 20:32:06,487 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 121 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:06,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 266 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:32:06,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14520 states. [2023-11-06 20:32:07,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14520 to 13098. [2023-11-06 20:32:07,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13098 states, 10867 states have (on average 1.3552038281034324) internal successors, (14727), 10838 states have internal predecessors, (14727), 1388 states have call successors, (1388), 802 states have call predecessors, (1388), 842 states have return successors, (1486), 1458 states have call predecessors, (1486), 1388 states have call successors, (1486) [2023-11-06 20:32:07,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13098 states to 13098 states and 17601 transitions. [2023-11-06 20:32:07,984 INFO L78 Accepts]: Start accepts. Automaton has 13098 states and 17601 transitions. Word has length 86 [2023-11-06 20:32:07,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:07,985 INFO L495 AbstractCegarLoop]: Abstraction has 13098 states and 17601 transitions. [2023-11-06 20:32:07,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-06 20:32:07,985 INFO L276 IsEmpty]: Start isEmpty. Operand 13098 states and 17601 transitions. [2023-11-06 20:32:08,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-06 20:32:08,005 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:08,005 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:32:08,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 20:32:08,006 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:08,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:08,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1829356883, now seen corresponding path program 1 times [2023-11-06 20:32:08,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:08,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910175511] [2023-11-06 20:32:08,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:08,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:08,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 20:32:08,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:08,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910175511] [2023-11-06 20:32:08,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910175511] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:32:08,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:32:08,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:32:08,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501995434] [2023-11-06 20:32:08,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:32:08,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:32:08,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:08,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:32:08,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:32:08,086 INFO L87 Difference]: Start difference. First operand 13098 states and 17601 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8)