./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6fd1b86eb4bd4da10127873e4ddea09cb0ce3be9adebe9545b8e8b0c5a6a02d7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:05:19,123 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:05:19,219 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:05:19,226 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:05:19,227 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:05:19,256 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:05:19,256 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:05:19,257 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:05:19,258 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:05:19,259 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:05:19,259 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:05:19,260 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:05:19,260 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:05:19,261 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:05:19,262 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:05:19,262 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:05:19,263 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:05:19,263 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:05:19,264 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:05:19,265 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:05:19,265 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:05:19,266 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:05:19,267 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:05:19,268 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:05:19,268 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:05:19,269 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:05:19,269 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:05:19,270 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:05:19,270 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:05:19,271 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:05:19,271 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:05:19,272 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:05:19,272 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:05:19,273 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:05:19,274 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:05:19,274 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:05:19,274 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:05:19,275 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:05:19,276 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:05:19,276 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:05:19,276 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:05:19,279 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:05:19,279 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:05:19,280 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:05:19,280 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:05:19,281 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:05:19,281 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:05:19,281 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_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6fd1b86eb4bd4da10127873e4ddea09cb0ce3be9adebe9545b8e8b0c5a6a02d7 [2023-11-25 00:05:19,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:05:19,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:05:19,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:05:19,693 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:05:19,693 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:05:19,695 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-11-25 00:05:23,157 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:05:23,550 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:05:23,551 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-11-25 00:05:23,569 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/data/1400aa94e/35d150c5ade54906be480b4f679990f2/FLAGf8b57f9f0 [2023-11-25 00:05:23,592 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/data/1400aa94e/35d150c5ade54906be480b4f679990f2 [2023-11-25 00:05:23,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:05:23,605 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:05:23,609 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:05:23,610 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:05:23,617 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:05:23,621 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:05:23" (1/1) ... [2023-11-25 00:05:23,622 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ed978d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:23, skipping insertion in model container [2023-11-25 00:05:23,623 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:05:23" (1/1) ... [2023-11-25 00:05:23,743 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:05:24,135 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_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7806,7819] [2023-11-25 00:05:24,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:05:24,241 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:05:24,322 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_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7806,7819] [2023-11-25 00:05:24,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:05:24,403 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:05:24,404 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:24 WrapperNode [2023-11-25 00:05:24,404 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:05:24,405 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:05:24,406 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:05:24,406 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:05:24,415 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:24" (1/1) ... [2023-11-25 00:05:24,430 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:24" (1/1) ... [2023-11-25 00:05:24,485 INFO L138 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 675 [2023-11-25 00:05:24,485 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:05:24,486 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:05:24,486 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:05:24,486 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:05:24,496 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:24" (1/1) ... [2023-11-25 00:05:24,496 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:24" (1/1) ... [2023-11-25 00:05:24,501 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:24" (1/1) ... [2023-11-25 00:05:24,502 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:24" (1/1) ... [2023-11-25 00:05:24,517 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:24" (1/1) ... [2023-11-25 00:05:24,523 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:24" (1/1) ... [2023-11-25 00:05:24,527 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:24" (1/1) ... [2023-11-25 00:05:24,531 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:24" (1/1) ... [2023-11-25 00:05:24,536 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:05:24,537 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:05:24,538 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:05:24,538 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:05:24,539 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:24" (1/1) ... [2023-11-25 00:05:24,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:05:24,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:05:24,576 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:05:24,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:05:24,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:05:24,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:05:24,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:05:24,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:05:24,860 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:05:24,863 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:05:25,540 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:05:26,001 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:05:26,001 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-25 00:05:26,006 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:05:26 BoogieIcfgContainer [2023-11-25 00:05:26,006 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:05:26,010 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:05:26,010 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:05:26,015 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:05:26,015 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:05:23" (1/3) ... [2023-11-25 00:05:26,017 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4f1f65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:05:26, skipping insertion in model container [2023-11-25 00:05:26,019 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:24" (2/3) ... [2023-11-25 00:05:26,022 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4f1f65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:05:26, skipping insertion in model container [2023-11-25 00:05:26,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:05:26" (3/3) ... [2023-11-25 00:05:26,024 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-11-25 00:05:26,054 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:05:26,054 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:05:26,123 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:05:26,133 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5f9642b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:05:26,139 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:05:26,148 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 96 states have (on average 1.78125) internal successors, (171), 103 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:26,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-25 00:05:26,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:26,163 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] [2023-11-25 00:05:26,163 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:26,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:26,175 INFO L85 PathProgramCache]: Analyzing trace with hash -560120458, now seen corresponding path program 1 times [2023-11-25 00:05:26,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:26,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145301168] [2023-11-25 00:05:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:26,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:05:26,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:26,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145301168] [2023-11-25 00:05:26,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145301168] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:05:26,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:05:26,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:05:26,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691548912] [2023-11-25 00:05:26,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:26,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:05:26,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:26,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:05:26,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:05:26,798 INFO L87 Difference]: Start difference. First operand has 104 states, 96 states have (on average 1.78125) internal successors, (171), 103 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:26,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:26,944 INFO L93 Difference]: Finished difference Result 234 states and 364 transitions. [2023-11-25 00:05:26,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:05:26,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-25 00:05:26,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:26,959 INFO L225 Difference]: With dead ends: 234 [2023-11-25 00:05:26,959 INFO L226 Difference]: Without dead ends: 146 [2023-11-25 00:05:26,963 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 [2023-11-25 00:05:26,967 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 110 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:26,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 365 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:05:26,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-25 00:05:27,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2023-11-25 00:05:27,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.4335664335664335) internal successors, (205), 143 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:27,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 205 transitions. [2023-11-25 00:05:27,048 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 205 transitions. Word has length 43 [2023-11-25 00:05:27,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:27,050 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 205 transitions. [2023-11-25 00:05:27,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:27,050 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 205 transitions. [2023-11-25 00:05:27,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-25 00:05:27,055 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:27,055 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] [2023-11-25 00:05:27,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:05:27,056 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:27,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:27,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1985689482, now seen corresponding path program 1 times [2023-11-25 00:05:27,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:27,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833980697] [2023-11-25 00:05:27,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:27,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:05:27,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:27,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833980697] [2023-11-25 00:05:27,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833980697] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:05:27,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:05:27,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:05:27,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595252734] [2023-11-25 00:05:27,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:27,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:05:27,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:27,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:05:27,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:05:27,248 INFO L87 Difference]: Start difference. First operand 144 states and 205 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:27,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:27,322 INFO L93 Difference]: Finished difference Result 309 states and 458 transitions. [2023-11-25 00:05:27,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:05:27,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-11-25 00:05:27,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:27,329 INFO L225 Difference]: With dead ends: 309 [2023-11-25 00:05:27,329 INFO L226 Difference]: Without dead ends: 197 [2023-11-25 00:05:27,334 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 [2023-11-25 00:05:27,337 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 91 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:27,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 195 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:05:27,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-11-25 00:05:27,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2023-11-25 00:05:27,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.443298969072165) internal successors, (280), 194 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:27,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 280 transitions. [2023-11-25 00:05:27,358 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 280 transitions. Word has length 45 [2023-11-25 00:05:27,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:27,359 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 280 transitions. [2023-11-25 00:05:27,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:27,360 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 280 transitions. [2023-11-25 00:05:27,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-25 00:05:27,367 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:27,369 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] [2023-11-25 00:05:27,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:05:27,370 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:27,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:27,375 INFO L85 PathProgramCache]: Analyzing trace with hash -845964841, now seen corresponding path program 1 times [2023-11-25 00:05:27,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:27,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900730343] [2023-11-25 00:05:27,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:27,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:27,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:05:27,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:27,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900730343] [2023-11-25 00:05:27,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900730343] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:05:27,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:05:27,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:05:27,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086723052] [2023-11-25 00:05:27,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:27,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:05:27,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:27,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:05:27,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:05:27,542 INFO L87 Difference]: Start difference. First operand 195 states and 280 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:27,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:27,590 INFO L93 Difference]: Finished difference Result 475 states and 703 transitions. [2023-11-25 00:05:27,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:05:27,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-25 00:05:27,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:27,593 INFO L225 Difference]: With dead ends: 475 [2023-11-25 00:05:27,593 INFO L226 Difference]: Without dead ends: 314 [2023-11-25 00:05:27,595 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 [2023-11-25 00:05:27,596 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 90 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:27,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 265 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:05:27,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-11-25 00:05:27,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2023-11-25 00:05:27,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.4565916398713827) internal successors, (453), 311 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:27,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 453 transitions. [2023-11-25 00:05:27,624 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 453 transitions. Word has length 47 [2023-11-25 00:05:27,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:27,625 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 453 transitions. [2023-11-25 00:05:27,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:27,626 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 453 transitions. [2023-11-25 00:05:27,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-25 00:05:27,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:27,627 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] [2023-11-25 00:05:27,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-25 00:05:27,628 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:27,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:27,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1675416450, now seen corresponding path program 1 times [2023-11-25 00:05:27,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:27,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528339450] [2023-11-25 00:05:27,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:27,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:27,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:05:27,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:27,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528339450] [2023-11-25 00:05:27,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528339450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:05:27,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:05:27,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:05:27,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793210665] [2023-11-25 00:05:27,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:27,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:05:27,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:27,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:05:27,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:05:27,736 INFO L87 Difference]: Start difference. First operand 312 states and 453 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:27,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:27,779 INFO L93 Difference]: Finished difference Result 767 states and 1142 transitions. [2023-11-25 00:05:27,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:05:27,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-25 00:05:27,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:27,786 INFO L225 Difference]: With dead ends: 767 [2023-11-25 00:05:27,786 INFO L226 Difference]: Without dead ends: 489 [2023-11-25 00:05:27,790 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 [2023-11-25 00:05:27,793 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 89 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:27,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 232 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:05:27,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2023-11-25 00:05:27,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 487. [2023-11-25 00:05:27,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 1.4794238683127572) internal successors, (719), 486 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:27,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 719 transitions. [2023-11-25 00:05:27,816 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 719 transitions. Word has length 49 [2023-11-25 00:05:27,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:27,817 INFO L495 AbstractCegarLoop]: Abstraction has 487 states and 719 transitions. [2023-11-25 00:05:27,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:27,817 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 719 transitions. [2023-11-25 00:05:27,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-25 00:05:27,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:27,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:27,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-25 00:05:27,819 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:27,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:27,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1103142179, now seen corresponding path program 1 times [2023-11-25 00:05:27,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:27,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584011928] [2023-11-25 00:05:27,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:27,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:05:27,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:27,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584011928] [2023-11-25 00:05:27,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584011928] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:05:27,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:05:27,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:05:27,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3120481] [2023-11-25 00:05:27,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:27,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:05:27,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:27,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:05:27,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:05:27,921 INFO L87 Difference]: Start difference. First operand 487 states and 719 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:27,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:27,972 INFO L93 Difference]: Finished difference Result 1235 states and 1834 transitions. [2023-11-25 00:05:27,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:05:27,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-11-25 00:05:27,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:27,981 INFO L225 Difference]: With dead ends: 1235 [2023-11-25 00:05:27,981 INFO L226 Difference]: Without dead ends: 798 [2023-11-25 00:05:27,982 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 [2023-11-25 00:05:27,984 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 84 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:27,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 241 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:05:27,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2023-11-25 00:05:28,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 796. [2023-11-25 00:05:28,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 1.4628930817610062) internal successors, (1163), 795 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:28,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1163 transitions. [2023-11-25 00:05:28,012 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1163 transitions. Word has length 51 [2023-11-25 00:05:28,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:28,014 INFO L495 AbstractCegarLoop]: Abstraction has 796 states and 1163 transitions. [2023-11-25 00:05:28,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:28,015 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1163 transitions. [2023-11-25 00:05:28,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-25 00:05:28,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:28,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:28,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-25 00:05:28,017 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:28,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:28,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1180359130, now seen corresponding path program 1 times [2023-11-25 00:05:28,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:28,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794205426] [2023-11-25 00:05:28,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:28,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:05:28,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:28,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794205426] [2023-11-25 00:05:28,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794205426] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:05:28,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:05:28,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:05:28,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328005838] [2023-11-25 00:05:28,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:28,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:05:28,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:28,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:05:28,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:05:28,158 INFO L87 Difference]: Start difference. First operand 796 states and 1163 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:28,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:28,206 INFO L93 Difference]: Finished difference Result 1995 states and 2953 transitions. [2023-11-25 00:05:28,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:05:28,210 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-11-25 00:05:28,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:28,219 INFO L225 Difference]: With dead ends: 1995 [2023-11-25 00:05:28,220 INFO L226 Difference]: Without dead ends: 1249 [2023-11-25 00:05:28,222 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 [2023-11-25 00:05:28,224 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 83 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:28,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 234 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:05:28,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2023-11-25 00:05:28,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1247. [2023-11-25 00:05:28,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 1.4751203852327448) internal successors, (1838), 1246 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:28,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 1838 transitions. [2023-11-25 00:05:28,272 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 1838 transitions. Word has length 53 [2023-11-25 00:05:28,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:28,272 INFO L495 AbstractCegarLoop]: Abstraction has 1247 states and 1838 transitions. [2023-11-25 00:05:28,273 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:28,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 1838 transitions. [2023-11-25 00:05:28,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-25 00:05:28,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:28,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:28,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-25 00:05:28,274 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:28,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:28,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1278960837, now seen corresponding path program 1 times [2023-11-25 00:05:28,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:28,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610261980] [2023-11-25 00:05:28,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:28,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:05:28,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:28,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610261980] [2023-11-25 00:05:28,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610261980] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:05:28,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:05:28,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:05:28,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603441619] [2023-11-25 00:05:28,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:28,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:05:28,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:28,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:05:28,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:05:28,422 INFO L87 Difference]: Start difference. First operand 1247 states and 1838 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:28,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:28,667 INFO L93 Difference]: Finished difference Result 3944 states and 5862 transitions. [2023-11-25 00:05:28,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:05:28,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-25 00:05:28,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:28,684 INFO L225 Difference]: With dead ends: 3944 [2023-11-25 00:05:28,684 INFO L226 Difference]: Without dead ends: 2745 [2023-11-25 00:05:28,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:05:28,687 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 525 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:28,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 954 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:05:28,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2023-11-25 00:05:28,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 1947. [2023-11-25 00:05:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1946 states have (on average 1.4820143884892085) internal successors, (2884), 1946 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:28,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 2884 transitions. [2023-11-25 00:05:28,777 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 2884 transitions. Word has length 55 [2023-11-25 00:05:28,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:28,778 INFO L495 AbstractCegarLoop]: Abstraction has 1947 states and 2884 transitions. [2023-11-25 00:05:28,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:28,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 2884 transitions. [2023-11-25 00:05:28,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-25 00:05:28,779 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:28,779 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:28,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-25 00:05:28,780 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:28,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:28,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1055584469, now seen corresponding path program 1 times [2023-11-25 00:05:28,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:28,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967073290] [2023-11-25 00:05:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:28,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:05:28,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:28,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967073290] [2023-11-25 00:05:28,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967073290] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:05:28,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:05:28,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:05:28,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063445913] [2023-11-25 00:05:28,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:28,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:05:28,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:28,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:05:28,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:05:28,897 INFO L87 Difference]: Start difference. First operand 1947 states and 2884 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:28,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:28,984 INFO L93 Difference]: Finished difference Result 4586 states and 6824 transitions. [2023-11-25 00:05:28,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:05:28,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-25 00:05:28,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:29,001 INFO L225 Difference]: With dead ends: 4586 [2023-11-25 00:05:29,001 INFO L226 Difference]: Without dead ends: 2705 [2023-11-25 00:05:29,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:05:29,006 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 174 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:29,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 342 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:05:29,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2023-11-25 00:05:29,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 2700. [2023-11-25 00:05:29,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2700 states, 2699 states have (on average 1.4842534271952574) internal successors, (4006), 2699 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2700 states to 2700 states and 4006 transitions. [2023-11-25 00:05:29,081 INFO L78 Accepts]: Start accepts. Automaton has 2700 states and 4006 transitions. Word has length 56 [2023-11-25 00:05:29,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:29,081 INFO L495 AbstractCegarLoop]: Abstraction has 2700 states and 4006 transitions. [2023-11-25 00:05:29,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:29,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2700 states and 4006 transitions. [2023-11-25 00:05:29,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-25 00:05:29,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:29,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:29,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-25 00:05:29,083 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:29,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:29,084 INFO L85 PathProgramCache]: Analyzing trace with hash 2141046368, now seen corresponding path program 1 times [2023-11-25 00:05:29,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:29,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900167376] [2023-11-25 00:05:29,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:29,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:05:29,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:29,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900167376] [2023-11-25 00:05:29,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900167376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:05:29,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:05:29,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:05:29,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759498050] [2023-11-25 00:05:29,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:29,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:05:29,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:29,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:05:29,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:05:29,514 INFO L87 Difference]: Start difference. First operand 2700 states and 4006 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:29,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:29,624 INFO L93 Difference]: Finished difference Result 4531 states and 6660 transitions. [2023-11-25 00:05:29,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:05:29,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-11-25 00:05:29,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:29,651 INFO L225 Difference]: With dead ends: 4531 [2023-11-25 00:05:29,652 INFO L226 Difference]: Without dead ends: 4529 [2023-11-25 00:05:29,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:05:29,657 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 176 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:29,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 672 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:05:29,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4529 states. [2023-11-25 00:05:29,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4529 to 2752. [2023-11-25 00:05:29,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2752 states, 2751 states have (on average 1.464921846601236) internal successors, (4030), 2751 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:29,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2752 states to 2752 states and 4030 transitions. [2023-11-25 00:05:29,755 INFO L78 Accepts]: Start accepts. Automaton has 2752 states and 4030 transitions. Word has length 64 [2023-11-25 00:05:29,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:29,756 INFO L495 AbstractCegarLoop]: Abstraction has 2752 states and 4030 transitions. [2023-11-25 00:05:29,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:29,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2752 states and 4030 transitions. [2023-11-25 00:05:29,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-25 00:05:29,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:29,757 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:29,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-25 00:05:29,758 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:29,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:29,758 INFO L85 PathProgramCache]: Analyzing trace with hash -53824523, now seen corresponding path program 1 times [2023-11-25 00:05:29,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:29,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078631127] [2023-11-25 00:05:29,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:29,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:05:31,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:31,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078631127] [2023-11-25 00:05:31,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078631127] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:05:31,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396625193] [2023-11-25 00:05:31,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:31,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:31,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:05:31,338 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:05:31,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:05:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:31,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-25 00:05:31,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:05:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:05:32,387 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:05:32,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396625193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:05:32,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:05:32,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2023-11-25 00:05:32,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961211415] [2023-11-25 00:05:32,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:32,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:05:32,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:32,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:05:32,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-25 00:05:32,390 INFO L87 Difference]: Start difference. First operand 2752 states and 4030 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:32,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:32,535 INFO L93 Difference]: Finished difference Result 7926 states and 11606 transitions. [2023-11-25 00:05:32,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:05:32,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2023-11-25 00:05:32,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:32,565 INFO L225 Difference]: With dead ends: 7926 [2023-11-25 00:05:32,565 INFO L226 Difference]: Without dead ends: 5237 [2023-11-25 00:05:32,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-25 00:05:32,570 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 307 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:32,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 320 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:05:32,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5237 states. [2023-11-25 00:05:32,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5237 to 5235. [2023-11-25 00:05:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5235 states, 5234 states have (on average 1.4543370271303018) internal successors, (7612), 5234 states have internal predecessors, (7612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:32,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5235 states to 5235 states and 7612 transitions. [2023-11-25 00:05:32,721 INFO L78 Accepts]: Start accepts. Automaton has 5235 states and 7612 transitions. Word has length 74 [2023-11-25 00:05:32,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:32,722 INFO L495 AbstractCegarLoop]: Abstraction has 5235 states and 7612 transitions. [2023-11-25 00:05:32,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:32,722 INFO L276 IsEmpty]: Start isEmpty. Operand 5235 states and 7612 transitions. [2023-11-25 00:05:32,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-25 00:05:32,723 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:32,724 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:32,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:05:32,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-25 00:05:32,943 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:32,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:32,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1704488236, now seen corresponding path program 1 times [2023-11-25 00:05:32,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:32,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227686519] [2023-11-25 00:05:32,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:32,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:05:33,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:33,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227686519] [2023-11-25 00:05:33,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227686519] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:05:33,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:05:33,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:05:33,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993246970] [2023-11-25 00:05:33,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:33,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:05:33,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:33,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:05:33,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:05:33,055 INFO L87 Difference]: Start difference. First operand 5235 states and 7612 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:33,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:33,159 INFO L93 Difference]: Finished difference Result 12165 states and 17756 transitions. [2023-11-25 00:05:33,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:05:33,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-11-25 00:05:33,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:33,221 INFO L225 Difference]: With dead ends: 12165 [2023-11-25 00:05:33,221 INFO L226 Difference]: Without dead ends: 6988 [2023-11-25 00:05:33,228 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 [2023-11-25 00:05:33,229 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 86 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:33,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 244 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:05:33,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6988 states. [2023-11-25 00:05:33,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6988 to 6986. [2023-11-25 00:05:33,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6986 states, 6985 states have (on average 1.4442376521116678) internal successors, (10088), 6985 states have internal predecessors, (10088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:33,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6986 states to 6986 states and 10088 transitions. [2023-11-25 00:05:33,481 INFO L78 Accepts]: Start accepts. Automaton has 6986 states and 10088 transitions. Word has length 75 [2023-11-25 00:05:33,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:33,481 INFO L495 AbstractCegarLoop]: Abstraction has 6986 states and 10088 transitions. [2023-11-25 00:05:33,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:33,482 INFO L276 IsEmpty]: Start isEmpty. Operand 6986 states and 10088 transitions. [2023-11-25 00:05:33,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-25 00:05:33,483 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:33,483 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:33,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-25 00:05:33,484 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:33,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:33,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1406117521, now seen corresponding path program 1 times [2023-11-25 00:05:33,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:33,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470110721] [2023-11-25 00:05:33,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:33,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:05:33,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:33,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470110721] [2023-11-25 00:05:33,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470110721] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:05:33,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:05:33,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:05:33,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313641543] [2023-11-25 00:05:33,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:33,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:05:33,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:33,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:05:33,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:05:33,665 INFO L87 Difference]: Start difference. First operand 6986 states and 10088 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:33,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:33,802 INFO L93 Difference]: Finished difference Result 13916 states and 20109 transitions. [2023-11-25 00:05:33,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:05:33,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2023-11-25 00:05:33,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:33,821 INFO L225 Difference]: With dead ends: 13916 [2023-11-25 00:05:33,821 INFO L226 Difference]: Without dead ends: 6986 [2023-11-25 00:05:33,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:05:33,831 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 321 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:33,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 118 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:05:33,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6986 states. [2023-11-25 00:05:33,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6986 to 6986. [2023-11-25 00:05:34,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6986 states, 6985 states have (on average 1.4263421617752325) internal successors, (9963), 6985 states have internal predecessors, (9963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:34,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6986 states to 6986 states and 9963 transitions. [2023-11-25 00:05:34,038 INFO L78 Accepts]: Start accepts. Automaton has 6986 states and 9963 transitions. Word has length 78 [2023-11-25 00:05:34,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:34,038 INFO L495 AbstractCegarLoop]: Abstraction has 6986 states and 9963 transitions. [2023-11-25 00:05:34,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:34,039 INFO L276 IsEmpty]: Start isEmpty. Operand 6986 states and 9963 transitions. [2023-11-25 00:05:34,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-25 00:05:34,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:34,041 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:34,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-25 00:05:34,041 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:34,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:34,042 INFO L85 PathProgramCache]: Analyzing trace with hash -2031379766, now seen corresponding path program 1 times [2023-11-25 00:05:34,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:34,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739864146] [2023-11-25 00:05:34,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:34,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:05:35,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:35,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739864146] [2023-11-25 00:05:35,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739864146] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:05:35,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252459854] [2023-11-25 00:05:35,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:35,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:35,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:05:35,756 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:05:35,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:05:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:35,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-25 00:05:35,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:05:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-25 00:05:36,508 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:05:36,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252459854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:05:36,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:05:36,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2023-11-25 00:05:36,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644163884] [2023-11-25 00:05:36,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:36,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:05:36,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:36,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:05:36,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-25 00:05:36,512 INFO L87 Difference]: Start difference. First operand 6986 states and 9963 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:36,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:36,672 INFO L93 Difference]: Finished difference Result 20395 states and 29029 transitions. [2023-11-25 00:05:36,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:05:36,672 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2023-11-25 00:05:36,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:36,703 INFO L225 Difference]: With dead ends: 20395 [2023-11-25 00:05:36,704 INFO L226 Difference]: Without dead ends: 13456 [2023-11-25 00:05:36,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-11-25 00:05:36,717 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 299 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:36,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 323 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:05:36,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13456 states. [2023-11-25 00:05:36,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13456 to 13454. [2023-11-25 00:05:36,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13454 states, 13453 states have (on average 1.4141827101761688) internal successors, (19025), 13453 states have internal predecessors, (19025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:36,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13454 states to 13454 states and 19025 transitions. [2023-11-25 00:05:36,989 INFO L78 Accepts]: Start accepts. Automaton has 13454 states and 19025 transitions. Word has length 78 [2023-11-25 00:05:36,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:36,990 INFO L495 AbstractCegarLoop]: Abstraction has 13454 states and 19025 transitions. [2023-11-25 00:05:36,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:36,990 INFO L276 IsEmpty]: Start isEmpty. Operand 13454 states and 19025 transitions. [2023-11-25 00:05:36,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-25 00:05:36,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:36,992 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:37,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-25 00:05:37,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-25 00:05:37,199 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:37,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:37,199 INFO L85 PathProgramCache]: Analyzing trace with hash -198823967, now seen corresponding path program 1 times [2023-11-25 00:05:37,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:37,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462821992] [2023-11-25 00:05:37,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:37,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:37,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-25 00:05:37,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:37,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462821992] [2023-11-25 00:05:37,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462821992] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:05:37,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:05:37,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:05:37,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383664335] [2023-11-25 00:05:37,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:37,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:05:37,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:37,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:05:37,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:05:37,293 INFO L87 Difference]: Start difference. First operand 13454 states and 19025 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:37,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:37,443 INFO L93 Difference]: Finished difference Result 30256 states and 42837 transitions. [2023-11-25 00:05:37,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:05:37,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-11-25 00:05:37,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:37,483 INFO L225 Difference]: With dead ends: 30256 [2023-11-25 00:05:37,483 INFO L226 Difference]: Without dead ends: 16844 [2023-11-25 00:05:37,500 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 [2023-11-25 00:05:37,501 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 85 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:37,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 236 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:05:37,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16844 states. [2023-11-25 00:05:37,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16844 to 16842. [2023-11-25 00:05:37,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16842 states, 16841 states have (on average 1.3997387328543436) internal successors, (23573), 16841 states have internal predecessors, (23573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:37,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16842 states to 16842 states and 23573 transitions. [2023-11-25 00:05:37,907 INFO L78 Accepts]: Start accepts. Automaton has 16842 states and 23573 transitions. Word has length 79 [2023-11-25 00:05:37,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:37,907 INFO L495 AbstractCegarLoop]: Abstraction has 16842 states and 23573 transitions. [2023-11-25 00:05:37,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:37,908 INFO L276 IsEmpty]: Start isEmpty. Operand 16842 states and 23573 transitions. [2023-11-25 00:05:37,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-25 00:05:37,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:37,909 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:37,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-25 00:05:37,910 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:37,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:37,910 INFO L85 PathProgramCache]: Analyzing trace with hash -939138209, now seen corresponding path program 1 times [2023-11-25 00:05:37,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:37,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148381762] [2023-11-25 00:05:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:37,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:39,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:05:39,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:39,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148381762] [2023-11-25 00:05:39,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148381762] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:05:39,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291832796] [2023-11-25 00:05:39,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:39,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:39,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:05:39,567 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:05:39,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:05:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:39,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-25 00:05:39,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:05:40,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:05:40,638 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:05:40,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291832796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:05:40,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:05:40,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2023-11-25 00:05:40,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143682771] [2023-11-25 00:05:40,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:40,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:05:40,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:40,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:05:40,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-25 00:05:40,642 INFO L87 Difference]: Start difference. First operand 16842 states and 23573 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:40,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:40,913 INFO L93 Difference]: Finished difference Result 49078 states and 68487 transitions. [2023-11-25 00:05:40,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:05:40,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2023-11-25 00:05:40,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:40,985 INFO L225 Difference]: With dead ends: 49078 [2023-11-25 00:05:40,985 INFO L226 Difference]: Without dead ends: 32330 [2023-11-25 00:05:41,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-25 00:05:41,009 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 274 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:41,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 330 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:05:41,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32330 states. [2023-11-25 00:05:41,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32330 to 32328. [2023-11-25 00:05:41,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32328 states, 32327 states have (on average 1.3848795124818263) internal successors, (44769), 32327 states have internal predecessors, (44769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:41,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32328 states to 32328 states and 44769 transitions. [2023-11-25 00:05:41,671 INFO L78 Accepts]: Start accepts. Automaton has 32328 states and 44769 transitions. Word has length 82 [2023-11-25 00:05:41,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:41,672 INFO L495 AbstractCegarLoop]: Abstraction has 32328 states and 44769 transitions. [2023-11-25 00:05:41,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:41,672 INFO L276 IsEmpty]: Start isEmpty. Operand 32328 states and 44769 transitions. [2023-11-25 00:05:41,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-25 00:05:41,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:41,676 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:41,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:05:41,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:41,883 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:41,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:41,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1853744730, now seen corresponding path program 1 times [2023-11-25 00:05:41,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:41,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120336090] [2023-11-25 00:05:41,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:41,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-25 00:05:41,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:41,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120336090] [2023-11-25 00:05:41,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120336090] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:05:41,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:05:41,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:05:41,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729865761] [2023-11-25 00:05:41,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:41,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:05:41,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:41,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:05:41,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:05:41,982 INFO L87 Difference]: Start difference. First operand 32328 states and 44769 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:42,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:42,340 INFO L93 Difference]: Finished difference Result 75032 states and 104147 transitions. [2023-11-25 00:05:42,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:05:42,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2023-11-25 00:05:42,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:42,453 INFO L225 Difference]: With dead ends: 75032 [2023-11-25 00:05:42,453 INFO L226 Difference]: Without dead ends: 42798 [2023-11-25 00:05:42,692 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 [2023-11-25 00:05:42,695 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 70 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:42,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 245 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:05:42,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42798 states. [2023-11-25 00:05:43,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42798 to 42796. [2023-11-25 00:05:43,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42796 states, 42795 states have (on average 1.3723332164972544) internal successors, (58729), 42795 states have internal predecessors, (58729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:43,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42796 states to 42796 states and 58729 transitions. [2023-11-25 00:05:43,841 INFO L78 Accepts]: Start accepts. Automaton has 42796 states and 58729 transitions. Word has length 83 [2023-11-25 00:05:43,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:43,842 INFO L495 AbstractCegarLoop]: Abstraction has 42796 states and 58729 transitions. [2023-11-25 00:05:43,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:43,842 INFO L276 IsEmpty]: Start isEmpty. Operand 42796 states and 58729 transitions. [2023-11-25 00:05:43,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-25 00:05:43,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:43,845 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:43,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-25 00:05:43,846 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:43,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:43,846 INFO L85 PathProgramCache]: Analyzing trace with hash 826884596, now seen corresponding path program 1 times [2023-11-25 00:05:43,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:43,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380084937] [2023-11-25 00:05:43,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:43,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:05:45,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:45,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380084937] [2023-11-25 00:05:45,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380084937] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:05:45,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488291571] [2023-11-25 00:05:45,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:45,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:45,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:05:45,404 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:05:45,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:05:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:45,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-25 00:05:45,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:05:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:05:46,623 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:05:46,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488291571] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:05:46,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:05:46,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2023-11-25 00:05:46,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669614549] [2023-11-25 00:05:46,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:46,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:05:46,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:46,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:05:46,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-25 00:05:46,627 INFO L87 Difference]: Start difference. First operand 42796 states and 58729 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:47,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:47,075 INFO L93 Difference]: Finished difference Result 75777 states and 103711 transitions. [2023-11-25 00:05:47,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:05:47,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2023-11-25 00:05:47,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:47,154 INFO L225 Difference]: With dead ends: 75777 [2023-11-25 00:05:47,155 INFO L226 Difference]: Without dead ends: 33072 [2023-11-25 00:05:47,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-11-25 00:05:47,178 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 581 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:47,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 246 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:05:47,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33072 states. [2023-11-25 00:05:47,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33072 to 32855. [2023-11-25 00:05:47,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32855 states, 32854 states have (on average 1.365739331588239) internal successors, (44870), 32854 states have internal predecessors, (44870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:48,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32855 states to 32855 states and 44870 transitions. [2023-11-25 00:05:48,108 INFO L78 Accepts]: Start accepts. Automaton has 32855 states and 44870 transitions. Word has length 86 [2023-11-25 00:05:48,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:48,109 INFO L495 AbstractCegarLoop]: Abstraction has 32855 states and 44870 transitions. [2023-11-25 00:05:48,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:48,109 INFO L276 IsEmpty]: Start isEmpty. Operand 32855 states and 44870 transitions. [2023-11-25 00:05:48,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-25 00:05:48,111 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:48,111 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:05:48,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-25 00:05:48,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-25 00:05:48,319 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:05:48,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:48,320 INFO L85 PathProgramCache]: Analyzing trace with hash 758293553, now seen corresponding path program 1 times [2023-11-25 00:05:48,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:48,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727057927] [2023-11-25 00:05:48,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:48,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:05:50,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:50,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727057927] [2023-11-25 00:05:50,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727057927] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:05:50,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479056688] [2023-11-25 00:05:50,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:50,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:05:50,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:05:50,092 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:05:50,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95fe9eb6-b30b-4a6a-aa47-ae9bca75ecfb/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:05:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:50,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-25 00:05:50,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:05:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:05:51,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:05:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:05:54,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479056688] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:05:54,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1958113160] [2023-11-25 00:05:54,920 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-11-25 00:05:54,920 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:05:54,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:05:54,933 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:05:54,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:05:56,163 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12