./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d9c684-9e31-4893-ad88-8916c9740437/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d9c684-9e31-4893-ad88-8916c9740437/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d9c684-9e31-4893-ad88-8916c9740437/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d9c684-9e31-4893-ad88-8916c9740437/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d9c684-9e31-4893-ad88-8916c9740437/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d9c684-9e31-4893-ad88-8916c9740437/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ed8936a2abd022df2df7ae7f4cc5a13ffa2d4ca9f4dc64b188ddb89053a00421 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:53:52,896 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:53:53,001 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d9c684-9e31-4893-ad88-8916c9740437/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:53:53,009 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:53:53,009 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:53:53,049 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:53:53,050 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:53:53,050 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:53:53,052 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:53:53,057 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:53:53,057 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:53:53,058 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:53:53,059 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:53:53,061 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:53:53,061 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:53:53,062 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:53:53,062 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:53:53,063 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:53:53,063 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:53:53,064 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:53:53,064 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:53:53,069 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:53:53,070 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:53:53,070 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:53:53,071 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:53:53,071 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:53:53,072 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:53:53,072 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:53:53,073 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:53:53,073 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:53:53,074 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:53:53,075 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:53:53,075 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:53:53,075 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:53:53,076 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:53:53,076 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:53:53,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:53:53,077 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:53:53,077 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:53:53,078 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:53:53,078 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:53:53,078 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:53:53,079 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:53:53,079 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:53:53,080 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:53:53,080 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_a6d9c684-9e31-4893-ad88-8916c9740437/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d9c684-9e31-4893-ad88-8916c9740437/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8936a2abd022df2df7ae7f4cc5a13ffa2d4ca9f4dc64b188ddb89053a00421 [2023-11-19 04:53:53,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:53:53,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:53:53,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:53:53,390 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:53:53,390 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:53:53,393 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d9c684-9e31-4893-ad88-8916c9740437/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-11-19 04:53:56,513 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:53:56,848 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:53:56,849 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d9c684-9e31-4893-ad88-8916c9740437/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-11-19 04:53:56,870 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d9c684-9e31-4893-ad88-8916c9740437/bin/utaipan-verify-t7M7D8N6sZ/data/7e4179e72/3e31ce2d18e149ec93c3b73fbddc2f22/FLAG1c2f6922e [2023-11-19 04:53:56,886 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d9c684-9e31-4893-ad88-8916c9740437/bin/utaipan-verify-t7M7D8N6sZ/data/7e4179e72/3e31ce2d18e149ec93c3b73fbddc2f22 [2023-11-19 04:53:56,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:53:56,890 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:53:56,892 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:53:56,892 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:53:56,897 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:53:56,898 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:53:56" (1/1) ... [2023-11-19 04:53:56,900 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@394ac336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:56, skipping insertion in model container [2023-11-19 04:53:56,900 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:53:56" (1/1) ... [2023-11-19 04:53:57,011 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:53:57,656 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_a6d9c684-9e31-4893-ad88-8916c9740437/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[31957,31970] [2023-11-19 04:53:57,882 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:53:57,904 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:53:58,197 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_a6d9c684-9e31-4893-ad88-8916c9740437/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[31957,31970] [2023-11-19 04:53:58,333 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:53:58,353 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:53:58,353 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:58 WrapperNode [2023-11-19 04:53:58,354 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:53:58,355 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:53:58,355 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:53:58,355 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:53:58,362 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:58" (1/1) ... [2023-11-19 04:53:58,421 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:58" (1/1) ... [2023-11-19 04:53:58,511 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2801 [2023-11-19 04:53:58,512 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:53:58,513 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:53:58,513 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:53:58,513 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:53:58,523 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:58" (1/1) ... [2023-11-19 04:53:58,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:58" (1/1) ... [2023-11-19 04:53:58,535 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:58" (1/1) ... [2023-11-19 04:53:58,535 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:58" (1/1) ... [2023-11-19 04:53:58,591 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:58" (1/1) ... [2023-11-19 04:53:58,625 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:58" (1/1) ... [2023-11-19 04:53:58,642 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:58" (1/1) ... [2023-11-19 04:53:58,657 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:58" (1/1) ... [2023-11-19 04:53:58,679 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:53:58,681 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:53:58,682 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:53:58,682 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:53:58,683 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:58" (1/1) ... [2023-11-19 04:53:58,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:53:58,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d9c684-9e31-4893-ad88-8916c9740437/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:53:58,718 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d9c684-9e31-4893-ad88-8916c9740437/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:53:58,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6d9c684-9e31-4893-ad88-8916c9740437/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:53:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:53:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:53:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:53:58,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:53:58,956 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:53:58,958 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:54:01,243 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:54:02,030 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:54:02,031 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 04:54:02,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:54:02 BoogieIcfgContainer [2023-11-19 04:54:02,042 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:54:02,044 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:54:02,044 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:54:02,048 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:54:02,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:53:56" (1/3) ... [2023-11-19 04:54:02,049 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@107ac661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:54:02, skipping insertion in model container [2023-11-19 04:54:02,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:58" (2/3) ... [2023-11-19 04:54:02,049 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@107ac661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:54:02, skipping insertion in model container [2023-11-19 04:54:02,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:54:02" (3/3) ... [2023-11-19 04:54:02,051 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-11-19 04:54:02,073 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:54:02,074 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:54:02,147 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:54:02,155 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;@1ea58f5d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:54:02,155 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:54:02,165 INFO L276 IsEmpty]: Start isEmpty. Operand has 584 states, 573 states have (on average 1.7102966841186737) internal successors, (980), 583 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:02,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2023-11-19 04:54:02,190 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:02,191 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:54:02,192 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:02,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:02,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1685629756, now seen corresponding path program 1 times [2023-11-19 04:54:02,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:02,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108923421] [2023-11-19 04:54:02,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:02,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:54:04,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:54:04,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108923421] [2023-11-19 04:54:04,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108923421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:54:04,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:54:04,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:54:04,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139313934] [2023-11-19 04:54:04,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:54:04,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:54:04,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:04,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:54:04,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:54:04,845 INFO L87 Difference]: Start difference. First operand has 584 states, 573 states have (on average 1.7102966841186737) internal successors, (980), 583 states have internal predecessors, (980), 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 4 states, 4 states have (on average 64.75) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:05,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:54:05,323 INFO L93 Difference]: Finished difference Result 1720 states and 2889 transitions. [2023-11-19 04:54:05,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:54:05,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2023-11-19 04:54:05,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:54:05,353 INFO L225 Difference]: With dead ends: 1720 [2023-11-19 04:54:05,353 INFO L226 Difference]: Without dead ends: 1123 [2023-11-19 04:54:05,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:54:05,367 INFO L413 NwaCegarLoop]: 1548 mSDtfsCounter, 2110 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2110 SdHoareTripleChecker+Valid, 2429 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:54:05,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2110 Valid, 2429 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:54:05,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2023-11-19 04:54:05,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 1121. [2023-11-19 04:54:05,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 1.3955357142857143) internal successors, (1563), 1120 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:05,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1563 transitions. [2023-11-19 04:54:05,473 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1563 transitions. Word has length 259 [2023-11-19 04:54:05,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:54:05,476 INFO L495 AbstractCegarLoop]: Abstraction has 1121 states and 1563 transitions. [2023-11-19 04:54:05,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:05,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1563 transitions. [2023-11-19 04:54:05,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2023-11-19 04:54:05,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:05,491 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:54:05,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:54:05,491 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:05,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:05,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1488911293, now seen corresponding path program 1 times [2023-11-19 04:54:05,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:05,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83230330] [2023-11-19 04:54:05,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:05,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:54:05,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:54:05,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83230330] [2023-11-19 04:54:05,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83230330] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:54:05,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:54:05,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:54:05,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209336926] [2023-11-19 04:54:05,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:54:05,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:54:05,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:05,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:54:05,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:54:05,820 INFO L87 Difference]: Start difference. First operand 1121 states and 1563 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:06,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:54:06,124 INFO L93 Difference]: Finished difference Result 3202 states and 4439 transitions. [2023-11-19 04:54:06,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:54:06,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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 261 [2023-11-19 04:54:06,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:54:06,141 INFO L225 Difference]: With dead ends: 3202 [2023-11-19 04:54:06,141 INFO L226 Difference]: Without dead ends: 2202 [2023-11-19 04:54:06,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:54:06,145 INFO L413 NwaCegarLoop]: 1418 mSDtfsCounter, 682 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 2142 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:54:06,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 2142 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:54:06,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2023-11-19 04:54:06,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 2200. [2023-11-19 04:54:06,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 1.389267849022283) internal successors, (3055), 2199 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:06,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 3055 transitions. [2023-11-19 04:54:06,206 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 3055 transitions. Word has length 261 [2023-11-19 04:54:06,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:54:06,207 INFO L495 AbstractCegarLoop]: Abstraction has 2200 states and 3055 transitions. [2023-11-19 04:54:06,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:06,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 3055 transitions. [2023-11-19 04:54:06,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2023-11-19 04:54:06,215 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:06,216 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:54:06,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:54:06,216 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:06,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:06,217 INFO L85 PathProgramCache]: Analyzing trace with hash -678090257, now seen corresponding path program 1 times [2023-11-19 04:54:06,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:06,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117774514] [2023-11-19 04:54:06,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:06,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:54:06,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:54:06,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117774514] [2023-11-19 04:54:06,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117774514] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:54:06,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:54:06,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:54:06,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123303973] [2023-11-19 04:54:06,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:54:06,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:54:06,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:06,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:54:06,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:54:06,427 INFO L87 Difference]: Start difference. First operand 2200 states and 3055 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:06,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:54:06,741 INFO L93 Difference]: Finished difference Result 6448 states and 8932 transitions. [2023-11-19 04:54:06,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:54:06,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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 261 [2023-11-19 04:54:06,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:54:06,766 INFO L225 Difference]: With dead ends: 6448 [2023-11-19 04:54:06,766 INFO L226 Difference]: Without dead ends: 4380 [2023-11-19 04:54:06,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:54:06,772 INFO L413 NwaCegarLoop]: 1508 mSDtfsCounter, 794 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 2260 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:54:06,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [794 Valid, 2260 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:54:06,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4380 states. [2023-11-19 04:54:06,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4380 to 2203. [2023-11-19 04:54:06,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 1.3887375113533151) internal successors, (3058), 2202 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:06,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 3058 transitions. [2023-11-19 04:54:06,874 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 3058 transitions. Word has length 261 [2023-11-19 04:54:06,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:54:06,875 INFO L495 AbstractCegarLoop]: Abstraction has 2203 states and 3058 transitions. [2023-11-19 04:54:06,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:06,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 3058 transitions. [2023-11-19 04:54:06,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2023-11-19 04:54:06,884 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:06,884 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:54:06,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:54:06,885 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:06,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:06,886 INFO L85 PathProgramCache]: Analyzing trace with hash -719617493, now seen corresponding path program 1 times [2023-11-19 04:54:06,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:06,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311127774] [2023-11-19 04:54:06,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:06,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:54:08,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:54:08,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311127774] [2023-11-19 04:54:08,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311127774] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:54:08,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:54:08,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:54:08,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890526568] [2023-11-19 04:54:08,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:54:08,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:54:08,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:08,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:54:08,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:54:08,034 INFO L87 Difference]: Start difference. First operand 2203 states and 3058 transitions. Second operand has 5 states, 5 states have (on average 52.4) internal successors, (262), 4 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:08,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:54:08,407 INFO L93 Difference]: Finished difference Result 6391 states and 8845 transitions. [2023-11-19 04:54:08,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:54:08,408 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 52.4) internal successors, (262), 4 states have internal predecessors, (262), 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 262 [2023-11-19 04:54:08,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:54:08,431 INFO L225 Difference]: With dead ends: 6391 [2023-11-19 04:54:08,431 INFO L226 Difference]: Without dead ends: 4203 [2023-11-19 04:54:08,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:54:08,446 INFO L413 NwaCegarLoop]: 1247 mSDtfsCounter, 2233 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2233 SdHoareTripleChecker+Valid, 1961 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:54:08,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2233 Valid, 1961 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:54:08,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4203 states. [2023-11-19 04:54:08,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4203 to 4201. [2023-11-19 04:54:08,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4201 states, 4200 states have (on average 1.3745238095238095) internal successors, (5773), 4200 states have internal predecessors, (5773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:08,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4201 states to 4201 states and 5773 transitions. [2023-11-19 04:54:08,625 INFO L78 Accepts]: Start accepts. Automaton has 4201 states and 5773 transitions. Word has length 262 [2023-11-19 04:54:08,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:54:08,626 INFO L495 AbstractCegarLoop]: Abstraction has 4201 states and 5773 transitions. [2023-11-19 04:54:08,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.4) internal successors, (262), 4 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:08,627 INFO L276 IsEmpty]: Start isEmpty. Operand 4201 states and 5773 transitions. [2023-11-19 04:54:08,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2023-11-19 04:54:08,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:08,639 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:54:08,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:54:08,640 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:08,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:08,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1042190874, now seen corresponding path program 1 times [2023-11-19 04:54:08,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:08,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142644683] [2023-11-19 04:54:08,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:08,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:54:09,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:54:09,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142644683] [2023-11-19 04:54:09,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142644683] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:54:09,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:54:09,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:54:09,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160800191] [2023-11-19 04:54:09,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:54:09,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:54:09,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:09,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:54:09,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:54:09,830 INFO L87 Difference]: Start difference. First operand 4201 states and 5773 transitions. Second operand has 4 states, 4 states have (on average 65.75) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:10,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:54:10,201 INFO L93 Difference]: Finished difference Result 12279 states and 16834 transitions. [2023-11-19 04:54:10,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:54:10,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 3 states have internal predecessors, (263), 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 263 [2023-11-19 04:54:10,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:54:10,244 INFO L225 Difference]: With dead ends: 12279 [2023-11-19 04:54:10,244 INFO L226 Difference]: Without dead ends: 8216 [2023-11-19 04:54:10,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:54:10,252 INFO L413 NwaCegarLoop]: 1240 mSDtfsCounter, 1703 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1703 SdHoareTripleChecker+Valid, 1958 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:54:10,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1703 Valid, 1958 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:54:10,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8216 states. [2023-11-19 04:54:10,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8216 to 8214. [2023-11-19 04:54:10,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8214 states, 8213 states have (on average 1.3650310483380008) internal successors, (11211), 8213 states have internal predecessors, (11211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:10,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8214 states to 8214 states and 11211 transitions. [2023-11-19 04:54:10,537 INFO L78 Accepts]: Start accepts. Automaton has 8214 states and 11211 transitions. Word has length 263 [2023-11-19 04:54:10,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:54:10,538 INFO L495 AbstractCegarLoop]: Abstraction has 8214 states and 11211 transitions. [2023-11-19 04:54:10,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:10,538 INFO L276 IsEmpty]: Start isEmpty. Operand 8214 states and 11211 transitions. [2023-11-19 04:54:10,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-11-19 04:54:10,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:10,563 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:54:10,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:54:10,563 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:10,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:10,564 INFO L85 PathProgramCache]: Analyzing trace with hash 71875521, now seen corresponding path program 1 times [2023-11-19 04:54:10,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:10,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54084022] [2023-11-19 04:54:10,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:10,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:54:11,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:54:11,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54084022] [2023-11-19 04:54:11,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54084022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:54:11,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:54:11,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:54:11,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114799431] [2023-11-19 04:54:11,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:54:11,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:54:11,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:11,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:54:11,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:54:11,616 INFO L87 Difference]: Start difference. First operand 8214 states and 11211 transitions. Second operand has 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:12,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:54:12,065 INFO L93 Difference]: Finished difference Result 24102 states and 32824 transitions. [2023-11-19 04:54:12,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:54:12,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 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 265 [2023-11-19 04:54:12,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:54:12,137 INFO L225 Difference]: With dead ends: 24102 [2023-11-19 04:54:12,138 INFO L226 Difference]: Without dead ends: 16030 [2023-11-19 04:54:12,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:54:12,151 INFO L413 NwaCegarLoop]: 1225 mSDtfsCounter, 1682 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1682 SdHoareTripleChecker+Valid, 1935 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:54:12,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1682 Valid, 1935 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:54:12,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16030 states. [2023-11-19 04:54:12,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16030 to 16028. [2023-11-19 04:54:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16028 states, 16027 states have (on average 1.3532164472452737) internal successors, (21688), 16027 states have internal predecessors, (21688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:12,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16028 states to 16028 states and 21688 transitions. [2023-11-19 04:54:12,566 INFO L78 Accepts]: Start accepts. Automaton has 16028 states and 21688 transitions. Word has length 265 [2023-11-19 04:54:12,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:54:12,566 INFO L495 AbstractCegarLoop]: Abstraction has 16028 states and 21688 transitions. [2023-11-19 04:54:12,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:12,567 INFO L276 IsEmpty]: Start isEmpty. Operand 16028 states and 21688 transitions. [2023-11-19 04:54:12,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-11-19 04:54:12,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:12,600 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:54:12,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:54:12,600 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:12,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:12,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1088687097, now seen corresponding path program 1 times [2023-11-19 04:54:12,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:12,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220634487] [2023-11-19 04:54:12,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:12,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:54:12,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:54:12,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220634487] [2023-11-19 04:54:12,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220634487] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:54:12,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:54:12,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:54:12,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513699801] [2023-11-19 04:54:12,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:54:12,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:54:12,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:12,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:54:12,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:54:12,864 INFO L87 Difference]: Start difference. First operand 16028 states and 21688 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:13,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:54:13,357 INFO L93 Difference]: Finished difference Result 45879 states and 61713 transitions. [2023-11-19 04:54:13,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:54:13,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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 267 [2023-11-19 04:54:13,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:54:13,419 INFO L225 Difference]: With dead ends: 45879 [2023-11-19 04:54:13,420 INFO L226 Difference]: Without dead ends: 31413 [2023-11-19 04:54:13,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:54:13,438 INFO L413 NwaCegarLoop]: 1432 mSDtfsCounter, 665 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 2156 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:54:13,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [665 Valid, 2156 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:54:13,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31413 states. [2023-11-19 04:54:14,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31413 to 31411. [2023-11-19 04:54:14,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31411 states, 31410 states have (on average 1.345272206303725) internal successors, (42255), 31410 states have internal predecessors, (42255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:14,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31411 states to 31411 states and 42255 transitions. [2023-11-19 04:54:14,273 INFO L78 Accepts]: Start accepts. Automaton has 31411 states and 42255 transitions. Word has length 267 [2023-11-19 04:54:14,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:54:14,274 INFO L495 AbstractCegarLoop]: Abstraction has 31411 states and 42255 transitions. [2023-11-19 04:54:14,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:14,274 INFO L276 IsEmpty]: Start isEmpty. Operand 31411 states and 42255 transitions. [2023-11-19 04:54:14,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-11-19 04:54:14,349 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:14,349 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:54:14,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:54:14,350 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:14,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:14,352 INFO L85 PathProgramCache]: Analyzing trace with hash -512471846, now seen corresponding path program 1 times [2023-11-19 04:54:14,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:14,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572370240] [2023-11-19 04:54:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:14,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:54:14,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:54:14,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572370240] [2023-11-19 04:54:14,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572370240] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:54:14,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:54:14,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:54:14,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671500983] [2023-11-19 04:54:14,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:54:14,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:54:14,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:14,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:54:14,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:54:14,589 INFO L87 Difference]: Start difference. First operand 31411 states and 42255 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:15,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:54:15,352 INFO L93 Difference]: Finished difference Result 92298 states and 123883 transitions. [2023-11-19 04:54:15,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:54:15,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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 267 [2023-11-19 04:54:15,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:54:15,485 INFO L225 Difference]: With dead ends: 92298 [2023-11-19 04:54:15,486 INFO L226 Difference]: Without dead ends: 62573 [2023-11-19 04:54:15,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:54:15,537 INFO L413 NwaCegarLoop]: 1487 mSDtfsCounter, 770 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 2239 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:54:15,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [770 Valid, 2239 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:54:15,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62573 states. [2023-11-19 04:54:16,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62573 to 31444. [2023-11-19 04:54:16,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31444 states, 31443 states have (on average 1.344909836847629) internal successors, (42288), 31443 states have internal predecessors, (42288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:16,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31444 states to 31444 states and 42288 transitions. [2023-11-19 04:54:16,829 INFO L78 Accepts]: Start accepts. Automaton has 31444 states and 42288 transitions. Word has length 267 [2023-11-19 04:54:16,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:54:16,829 INFO L495 AbstractCegarLoop]: Abstraction has 31444 states and 42288 transitions. [2023-11-19 04:54:16,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:16,830 INFO L276 IsEmpty]: Start isEmpty. Operand 31444 states and 42288 transitions. [2023-11-19 04:54:16,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2023-11-19 04:54:16,886 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:16,886 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:54:16,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 04:54:16,887 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:16,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:16,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2043614696, now seen corresponding path program 1 times [2023-11-19 04:54:16,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:16,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677986362] [2023-11-19 04:54:16,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:16,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:54:17,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:54:17,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677986362] [2023-11-19 04:54:17,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677986362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:54:17,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:54:17,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:54:17,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016350972] [2023-11-19 04:54:17,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:54:17,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:54:17,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:17,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:54:17,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:54:17,937 INFO L87 Difference]: Start difference. First operand 31444 states and 42288 transitions. Second operand has 5 states, 5 states have (on average 53.6) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:18,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:54:18,663 INFO L93 Difference]: Finished difference Result 91367 states and 122463 transitions. [2023-11-19 04:54:18,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:54:18,664 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.6) internal successors, (268), 4 states have internal predecessors, (268), 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 268 [2023-11-19 04:54:18,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:54:18,797 INFO L225 Difference]: With dead ends: 91367 [2023-11-19 04:54:18,797 INFO L226 Difference]: Without dead ends: 60123 [2023-11-19 04:54:18,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:54:18,828 INFO L413 NwaCegarLoop]: 1233 mSDtfsCounter, 2467 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2467 SdHoareTripleChecker+Valid, 1951 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:54:18,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2467 Valid, 1951 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:54:18,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60123 states. [2023-11-19 04:54:20,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60123 to 60121. [2023-11-19 04:54:20,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60121 states, 60120 states have (on average 1.3325182967398537) internal successors, (80111), 60120 states have internal predecessors, (80111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:20,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60121 states to 60121 states and 80111 transitions. [2023-11-19 04:54:20,691 INFO L78 Accepts]: Start accepts. Automaton has 60121 states and 80111 transitions. Word has length 268 [2023-11-19 04:54:20,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:54:20,700 INFO L495 AbstractCegarLoop]: Abstraction has 60121 states and 80111 transitions. [2023-11-19 04:54:20,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.6) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:20,701 INFO L276 IsEmpty]: Start isEmpty. Operand 60121 states and 80111 transitions. [2023-11-19 04:54:20,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-11-19 04:54:20,867 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:20,868 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:54:20,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 04:54:20,868 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:20,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:20,869 INFO L85 PathProgramCache]: Analyzing trace with hash 182588965, now seen corresponding path program 1 times [2023-11-19 04:54:20,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:20,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731821990] [2023-11-19 04:54:20,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:20,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:54:21,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:54:21,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731821990] [2023-11-19 04:54:21,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731821990] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:54:21,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:54:21,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:54:21,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176236517] [2023-11-19 04:54:21,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:54:21,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:54:21,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:21,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:54:21,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:54:21,999 INFO L87 Difference]: Start difference. First operand 60121 states and 80111 transitions. Second operand has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:23,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:54:23,102 INFO L93 Difference]: Finished difference Result 175547 states and 233167 transitions. [2023-11-19 04:54:23,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:54:23,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 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 269 [2023-11-19 04:54:23,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:54:23,552 INFO L225 Difference]: With dead ends: 175547 [2023-11-19 04:54:23,552 INFO L226 Difference]: Without dead ends: 117690 [2023-11-19 04:54:23,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:54:23,615 INFO L413 NwaCegarLoop]: 1232 mSDtfsCounter, 1693 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1693 SdHoareTripleChecker+Valid, 1954 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:54:23,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1693 Valid, 1954 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:54:23,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117690 states. [2023-11-19 04:54:25,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117690 to 117688. [2023-11-19 04:54:25,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117688 states, 117687 states have (on average 1.3241394546551446) internal successors, (155834), 117687 states have internal predecessors, (155834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:25,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117688 states to 117688 states and 155834 transitions. [2023-11-19 04:54:25,751 INFO L78 Accepts]: Start accepts. Automaton has 117688 states and 155834 transitions. Word has length 269 [2023-11-19 04:54:25,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:54:25,751 INFO L495 AbstractCegarLoop]: Abstraction has 117688 states and 155834 transitions. [2023-11-19 04:54:25,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:25,752 INFO L276 IsEmpty]: Start isEmpty. Operand 117688 states and 155834 transitions. [2023-11-19 04:54:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-11-19 04:54:25,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:25,869 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:54:25,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 04:54:25,869 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:25,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:25,870 INFO L85 PathProgramCache]: Analyzing trace with hash -869155143, now seen corresponding path program 1 times [2023-11-19 04:54:25,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:25,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767286357] [2023-11-19 04:54:25,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:25,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:54:27,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:54:27,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767286357] [2023-11-19 04:54:27,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767286357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:54:27,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:54:27,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:54:27,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783962455] [2023-11-19 04:54:27,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:54:27,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:54:27,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:27,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:54:27,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:54:27,238 INFO L87 Difference]: Start difference. First operand 117688 states and 155834 transitions. Second operand has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:28,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:54:28,458 INFO L93 Difference]: Finished difference Result 252312 states and 333920 transitions. [2023-11-19 04:54:28,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:54:28,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 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 271 [2023-11-19 04:54:28,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:54:28,718 INFO L225 Difference]: With dead ends: 252312 [2023-11-19 04:54:28,718 INFO L226 Difference]: Without dead ends: 136125 [2023-11-19 04:54:28,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:54:28,780 INFO L413 NwaCegarLoop]: 1211 mSDtfsCounter, 1666 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1666 SdHoareTripleChecker+Valid, 1925 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:54:28,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1666 Valid, 1925 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:54:28,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136125 states. [2023-11-19 04:54:30,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136125 to 119611. [2023-11-19 04:54:30,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119611 states, 119610 states have (on average 1.3254660981523283) internal successors, (158539), 119610 states have internal predecessors, (158539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:31,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119611 states to 119611 states and 158539 transitions. [2023-11-19 04:54:31,196 INFO L78 Accepts]: Start accepts. Automaton has 119611 states and 158539 transitions. Word has length 271 [2023-11-19 04:54:31,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:54:31,197 INFO L495 AbstractCegarLoop]: Abstraction has 119611 states and 158539 transitions. [2023-11-19 04:54:31,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:31,197 INFO L276 IsEmpty]: Start isEmpty. Operand 119611 states and 158539 transitions. [2023-11-19 04:54:31,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-11-19 04:54:31,819 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:31,820 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:54:31,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 04:54:31,820 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:31,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:31,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1536311391, now seen corresponding path program 1 times [2023-11-19 04:54:31,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:31,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95717872] [2023-11-19 04:54:31,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:31,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:54:32,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:54:32,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95717872] [2023-11-19 04:54:32,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95717872] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:54:32,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:54:32,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:54:32,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32500187] [2023-11-19 04:54:32,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:54:32,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:54:32,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:32,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:54:32,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:54:32,137 INFO L87 Difference]: Start difference. First operand 119611 states and 158539 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:33,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:54:33,065 INFO L93 Difference]: Finished difference Result 354969 states and 470251 transitions. [2023-11-19 04:54:33,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:54:33,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 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 273 [2023-11-19 04:54:33,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:54:34,021 INFO L225 Difference]: With dead ends: 354969 [2023-11-19 04:54:34,021 INFO L226 Difference]: Without dead ends: 237537 [2023-11-19 04:54:34,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:54:34,104 INFO L413 NwaCegarLoop]: 1466 mSDtfsCounter, 746 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 2218 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:54:34,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 2218 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:54:34,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237537 states. [2023-11-19 04:54:37,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237537 to 119835. [2023-11-19 04:54:37,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119835 states, 119834 states have (on average 1.3248577198457867) internal successors, (158763), 119834 states have internal predecessors, (158763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:37,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119835 states to 119835 states and 158763 transitions. [2023-11-19 04:54:37,978 INFO L78 Accepts]: Start accepts. Automaton has 119835 states and 158763 transitions. Word has length 273 [2023-11-19 04:54:37,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:54:37,979 INFO L495 AbstractCegarLoop]: Abstraction has 119835 states and 158763 transitions. [2023-11-19 04:54:37,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:54:37,979 INFO L276 IsEmpty]: Start isEmpty. Operand 119835 states and 158763 transitions. [2023-11-19 04:54:38,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-11-19 04:54:38,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:38,059 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:54:38,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 04:54:38,059 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:38,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:38,060 INFO L85 PathProgramCache]: Analyzing trace with hash 555554971, now seen corresponding path program 1 times [2023-11-19 04:54:38,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:38,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809253832] [2023-11-19 04:54:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:38,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:38,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:54:38,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:54:38,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809253832] [2023-11-19 04:54:38,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809253832] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:54:38,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:54:38,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:54:38,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630171096] [2023-11-19 04:54:38,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:54:38,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:54:38,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:38,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:54:38,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:54:38,887 INFO L87 Difference]: Start difference. First operand 119835 states and 158763 transitions. Second operand has 5 states, 5 states have (on average 54.8) internal successors, (274), 4 states have internal predecessors, (274), 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)