./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb056683-eae7-4b07-84ec-f795b6066b52/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb056683-eae7-4b07-84ec-f795b6066b52/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb056683-eae7-4b07-84ec-f795b6066b52/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb056683-eae7-4b07-84ec-f795b6066b52/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb056683-eae7-4b07-84ec-f795b6066b52/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb056683-eae7-4b07-84ec-f795b6066b52/bin/utaipan-verify-DbMuA5NWw2 --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 77af8780d2ec99ad0d03b475aa25db67a7ba0a218594f51cddbe35460cd2b670 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:36:38,759 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:36:38,861 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb056683-eae7-4b07-84ec-f795b6066b52/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:36:38,870 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:36:38,871 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:36:38,911 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:36:38,913 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:36:38,914 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:36:38,914 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:36:38,915 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:36:38,915 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:36:38,915 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:36:38,916 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:36:38,916 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:36:38,917 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:36:38,918 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:36:38,919 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:36:38,920 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:36:38,920 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:36:38,921 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:36:38,921 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:36:38,924 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:36:38,924 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:36:38,925 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:36:38,925 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:36:38,925 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:36:38,925 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:36:38,926 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:36:38,926 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:36:38,926 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:36:38,930 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:36:38,931 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:36:38,931 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:36:38,931 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:36:38,931 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:36:38,932 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:36:38,932 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:36:38,933 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:36:38,933 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:36:38,933 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:36:38,934 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:36:38,934 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:36:38,935 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:36:38,935 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:36:38,935 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:36:38,935 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:36:38,935 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:36:38,936 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_bb056683-eae7-4b07-84ec-f795b6066b52/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb056683-eae7-4b07-84ec-f795b6066b52/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77af8780d2ec99ad0d03b475aa25db67a7ba0a218594f51cddbe35460cd2b670 [2024-11-02 12:36:39,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:36:39,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:36:39,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:36:39,256 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:36:39,256 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:36:39,258 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb056683-eae7-4b07-84ec-f795b6066b52/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c Unable to find full path for "g++" [2024-11-02 12:36:41,676 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:36:41,968 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:36:41,968 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb056683-eae7-4b07-84ec-f795b6066b52/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c [2024-11-02 12:36:41,986 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb056683-eae7-4b07-84ec-f795b6066b52/bin/utaipan-verify-DbMuA5NWw2/data/de84540ad/56fb4f507c9045238ced3bd616e7f083/FLAG5593644d5 [2024-11-02 12:36:42,011 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb056683-eae7-4b07-84ec-f795b6066b52/bin/utaipan-verify-DbMuA5NWw2/data/de84540ad/56fb4f507c9045238ced3bd616e7f083 [2024-11-02 12:36:42,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:36:42,016 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:36:42,018 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:36:42,018 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:36:42,024 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:36:42,027 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:36:42" (1/1) ... [2024-11-02 12:36:42,028 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ccdb058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:42, skipping insertion in model container [2024-11-02 12:36:42,028 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:36:42" (1/1) ... [2024-11-02 12:36:42,088 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:36:42,498 WARN L251 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_bb056683-eae7-4b07-84ec-f795b6066b52/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c[26618,26631] [2024-11-02 12:36:42,502 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:36:42,515 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:36:42,634 WARN L251 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_bb056683-eae7-4b07-84ec-f795b6066b52/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c[26618,26631] [2024-11-02 12:36:42,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:36:42,660 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:36:42,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:42 WrapperNode [2024-11-02 12:36:42,660 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:36:42,661 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:36:42,662 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:36:42,662 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:36:42,675 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:42" (1/1) ... [2024-11-02 12:36:42,696 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:42" (1/1) ... [2024-11-02 12:36:42,761 INFO L138 Inliner]: procedures = 23, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 998 [2024-11-02 12:36:42,761 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:36:42,762 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:36:42,762 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:36:42,762 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:36:42,776 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:42" (1/1) ... [2024-11-02 12:36:42,776 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:42" (1/1) ... [2024-11-02 12:36:42,786 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:42" (1/1) ... [2024-11-02 12:36:42,786 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:42" (1/1) ... [2024-11-02 12:36:42,818 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:42" (1/1) ... [2024-11-02 12:36:42,841 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:42" (1/1) ... [2024-11-02 12:36:42,848 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:42" (1/1) ... [2024-11-02 12:36:42,858 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:42" (1/1) ... [2024-11-02 12:36:42,871 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:36:42,872 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:36:42,873 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:36:42,873 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:36:42,875 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:42" (1/1) ... [2024-11-02 12:36:42,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:36:42,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb056683-eae7-4b07-84ec-f795b6066b52/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:42,909 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb056683-eae7-4b07-84ec-f795b6066b52/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:36:42,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb056683-eae7-4b07-84ec-f795b6066b52/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:36:42,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:36:42,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:36:42,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:36:42,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:36:43,138 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:36:43,141 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:36:44,495 INFO L? ?]: Removed 103 outVars from TransFormulas that were not future-live. [2024-11-02 12:36:44,496 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:36:45,583 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:36:45,584 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-02 12:36:45,584 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:36:45 BoogieIcfgContainer [2024-11-02 12:36:45,585 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:36:45,588 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:36:45,588 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:36:45,592 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:36:45,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:36:42" (1/3) ... [2024-11-02 12:36:45,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a1025d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:36:45, skipping insertion in model container [2024-11-02 12:36:45,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:42" (2/3) ... [2024-11-02 12:36:45,595 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a1025d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:36:45, skipping insertion in model container [2024-11-02 12:36:45,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:36:45" (3/3) ... [2024-11-02 12:36:45,601 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c [2024-11-02 12:36:45,621 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:36:45,622 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:36:45,724 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:36:45,732 INFO L333 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, 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;@38ca3fdd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:36:45,732 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:36:45,739 INFO L276 IsEmpty]: Start isEmpty. Operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 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) [2024-11-02 12:36:45,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-02 12:36:45,753 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:45,754 INFO L215 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] [2024-11-02 12:36:45,754 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:45,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:45,763 INFO L85 PathProgramCache]: Analyzing trace with hash -59809749, now seen corresponding path program 1 times [2024-11-02 12:36:45,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:45,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978511573] [2024-11-02 12:36:45,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:45,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:36:51,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:51,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978511573] [2024-11-02 12:36:51,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978511573] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:51,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:51,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:36:51,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206945177] [2024-11-02 12:36:51,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:51,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:36:51,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:51,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:36:51,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:36:51,343 INFO L87 Difference]: Start difference. First operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 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 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2024-11-02 12:36:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:51,861 INFO L93 Difference]: Finished difference Result 180 states and 288 transitions. [2024-11-02 12:36:51,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:36:51,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2024-11-02 12:36:51,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:51,894 INFO L225 Difference]: With dead ends: 180 [2024-11-02 12:36:51,895 INFO L226 Difference]: Without dead ends: 158 [2024-11-02 12:36:51,899 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:36:51,906 INFO L432 NwaCegarLoop]: 181 mSDtfsCounter, 28 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:51,907 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 539 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-02 12:36:51,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-02 12:36:51,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2024-11-02 12:36:51,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6122448979591837) internal successors, (237), 147 states have internal predecessors, (237), 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) [2024-11-02 12:36:51,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 237 transitions. [2024-11-02 12:36:51,975 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 237 transitions. Word has length 54 [2024-11-02 12:36:51,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:51,976 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 237 transitions. [2024-11-02 12:36:51,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2024-11-02 12:36:51,977 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 237 transitions. [2024-11-02 12:36:51,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-02 12:36:51,980 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:51,980 INFO L215 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] [2024-11-02 12:36:51,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:36:51,981 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:51,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:51,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1922305900, now seen corresponding path program 1 times [2024-11-02 12:36:51,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:51,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877322358] [2024-11-02 12:36:51,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:51,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:36:54,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:54,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877322358] [2024-11-02 12:36:54,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877322358] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:54,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:54,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:36:54,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007097909] [2024-11-02 12:36:54,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:54,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:36:54,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:54,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:36:54,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:36:54,334 INFO L87 Difference]: Start difference. First operand 148 states and 237 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:36:54,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:54,604 INFO L93 Difference]: Finished difference Result 180 states and 285 transitions. [2024-11-02 12:36:54,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:36:54,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-11-02 12:36:54,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:54,607 INFO L225 Difference]: With dead ends: 180 [2024-11-02 12:36:54,610 INFO L226 Difference]: Without dead ends: 160 [2024-11-02 12:36:54,611 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:36:54,612 INFO L432 NwaCegarLoop]: 186 mSDtfsCounter, 24 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:54,613 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 385 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:36:54,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-02 12:36:54,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2024-11-02 12:36:54,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6054421768707483) internal successors, (236), 147 states have internal predecessors, (236), 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) [2024-11-02 12:36:54,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 236 transitions. [2024-11-02 12:36:54,630 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 236 transitions. Word has length 55 [2024-11-02 12:36:54,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:54,630 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 236 transitions. [2024-11-02 12:36:54,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:36:54,631 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 236 transitions. [2024-11-02 12:36:54,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-02 12:36:54,633 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:54,633 INFO L215 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] [2024-11-02 12:36:54,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:36:54,634 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:54,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:54,635 INFO L85 PathProgramCache]: Analyzing trace with hash 475307316, now seen corresponding path program 1 times [2024-11-02 12:36:54,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:54,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662011717] [2024-11-02 12:36:54,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:54,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:36:56,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:56,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662011717] [2024-11-02 12:36:56,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662011717] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:56,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:56,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:36:56,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069942903] [2024-11-02 12:36:56,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:56,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:36:56,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:56,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:36:56,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:36:57,001 INFO L87 Difference]: Start difference. First operand 148 states and 236 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:36:57,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:57,283 INFO L93 Difference]: Finished difference Result 180 states and 284 transitions. [2024-11-02 12:36:57,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:36:57,284 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2024-11-02 12:36:57,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:57,285 INFO L225 Difference]: With dead ends: 180 [2024-11-02 12:36:57,286 INFO L226 Difference]: Without dead ends: 160 [2024-11-02 12:36:57,286 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:36:57,289 INFO L432 NwaCegarLoop]: 186 mSDtfsCounter, 22 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:57,289 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 552 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:36:57,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-02 12:36:57,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2024-11-02 12:36:57,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.598639455782313) internal successors, (235), 147 states have internal predecessors, (235), 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) [2024-11-02 12:36:57,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 235 transitions. [2024-11-02 12:36:57,307 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 235 transitions. Word has length 56 [2024-11-02 12:36:57,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:57,307 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 235 transitions. [2024-11-02 12:36:57,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:36:57,308 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 235 transitions. [2024-11-02 12:36:57,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-02 12:36:57,313 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:57,314 INFO L215 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] [2024-11-02 12:36:57,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:36:57,314 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:57,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:57,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1792324733, now seen corresponding path program 1 times [2024-11-02 12:36:57,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:57,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544704696] [2024-11-02 12:36:57,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:57,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:36:59,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:59,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544704696] [2024-11-02 12:36:59,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544704696] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:59,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:59,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:36:59,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406669134] [2024-11-02 12:36:59,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:59,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:36:59,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:59,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:36:59,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:36:59,851 INFO L87 Difference]: Start difference. First operand 148 states and 235 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2024-11-02 12:37:00,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:00,082 INFO L93 Difference]: Finished difference Result 180 states and 283 transitions. [2024-11-02 12:37:00,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:37:00,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 57 [2024-11-02 12:37:00,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:00,085 INFO L225 Difference]: With dead ends: 180 [2024-11-02 12:37:00,085 INFO L226 Difference]: Without dead ends: 160 [2024-11-02 12:37:00,085 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:37:00,087 INFO L432 NwaCegarLoop]: 186 mSDtfsCounter, 20 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:00,089 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 383 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:37:00,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-02 12:37:00,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2024-11-02 12:37:00,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5918367346938775) internal successors, (234), 147 states have internal predecessors, (234), 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) [2024-11-02 12:37:00,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 234 transitions. [2024-11-02 12:37:00,101 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 234 transitions. Word has length 57 [2024-11-02 12:37:00,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:00,104 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 234 transitions. [2024-11-02 12:37:00,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2024-11-02 12:37:00,104 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 234 transitions. [2024-11-02 12:37:00,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-02 12:37:00,111 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:00,111 INFO L215 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] [2024-11-02 12:37:00,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:37:00,112 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:37:00,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:00,112 INFO L85 PathProgramCache]: Analyzing trace with hash -324356547, now seen corresponding path program 1 times [2024-11-02 12:37:00,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:00,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776705209] [2024-11-02 12:37:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:00,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:02,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:02,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:02,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776705209] [2024-11-02 12:37:02,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776705209] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:37:02,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:37:02,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:37:02,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685327970] [2024-11-02 12:37:02,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:37:02,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:37:02,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:02,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:37:02,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:37:02,246 INFO L87 Difference]: Start difference. First operand 148 states and 234 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2024-11-02 12:37:02,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:02,535 INFO L93 Difference]: Finished difference Result 180 states and 282 transitions. [2024-11-02 12:37:02,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:37:02,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 58 [2024-11-02 12:37:02,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:02,538 INFO L225 Difference]: With dead ends: 180 [2024-11-02 12:37:02,538 INFO L226 Difference]: Without dead ends: 160 [2024-11-02 12:37:02,539 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:37:02,540 INFO L432 NwaCegarLoop]: 186 mSDtfsCounter, 18 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:02,545 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 552 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:37:02,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-02 12:37:02,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2024-11-02 12:37:02,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5850340136054422) internal successors, (233), 147 states have internal predecessors, (233), 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) [2024-11-02 12:37:02,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 233 transitions. [2024-11-02 12:37:02,562 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 233 transitions. Word has length 58 [2024-11-02 12:37:02,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:02,563 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 233 transitions. [2024-11-02 12:37:02,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2024-11-02 12:37:02,564 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 233 transitions. [2024-11-02 12:37:02,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-02 12:37:02,565 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:02,565 INFO L215 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] [2024-11-02 12:37:02,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 12:37:02,569 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:37:02,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:02,570 INFO L85 PathProgramCache]: Analyzing trace with hash 348665701, now seen corresponding path program 1 times [2024-11-02 12:37:02,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:02,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577223577] [2024-11-02 12:37:02,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:02,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:05,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:05,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577223577] [2024-11-02 12:37:05,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577223577] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:37:05,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:37:05,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:37:05,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463340595] [2024-11-02 12:37:05,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:37:05,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:37:05,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:05,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:37:05,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:37:05,876 INFO L87 Difference]: Start difference. First operand 148 states and 233 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2024-11-02 12:37:06,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:06,137 INFO L93 Difference]: Finished difference Result 178 states and 278 transitions. [2024-11-02 12:37:06,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:37:06,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 60 [2024-11-02 12:37:06,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:06,139 INFO L225 Difference]: With dead ends: 178 [2024-11-02 12:37:06,139 INFO L226 Difference]: Without dead ends: 158 [2024-11-02 12:37:06,140 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:37:06,141 INFO L432 NwaCegarLoop]: 186 mSDtfsCounter, 15 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:06,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 377 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:37:06,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-02 12:37:06,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2024-11-02 12:37:06,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.5810810810810811) internal successors, (234), 148 states have internal predecessors, (234), 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) [2024-11-02 12:37:06,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 234 transitions. [2024-11-02 12:37:06,159 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 234 transitions. Word has length 60 [2024-11-02 12:37:06,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:06,160 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 234 transitions. [2024-11-02 12:37:06,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2024-11-02 12:37:06,164 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 234 transitions. [2024-11-02 12:37:06,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-02 12:37:06,165 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:06,165 INFO L215 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] [2024-11-02 12:37:06,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 12:37:06,166 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:37:06,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:06,167 INFO L85 PathProgramCache]: Analyzing trace with hash 2130657652, now seen corresponding path program 1 times [2024-11-02 12:37:06,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:06,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718295347] [2024-11-02 12:37:06,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:06,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat