./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label01.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_6ce08fd1-8775-4f47-a9b1-301247a3f429/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce08fd1-8775-4f47-a9b1-301247a3f429/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_6ce08fd1-8775-4f47-a9b1-301247a3f429/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce08fd1-8775-4f47-a9b1-301247a3f429/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label01.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce08fd1-8775-4f47-a9b1-301247a3f429/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_6ce08fd1-8775-4f47-a9b1-301247a3f429/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 92f387aee9179611b681311904b53986764751325111bb2d842a850437b442f7 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 11:20:58,842 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:20:58,990 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce08fd1-8775-4f47-a9b1-301247a3f429/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 11:20:58,997 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:20:58,997 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:20:59,030 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:20:59,031 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:20:59,032 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:20:59,033 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:20:59,034 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:20:59,034 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:20:59,035 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:20:59,035 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:20:59,037 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 11:20:59,038 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:20:59,038 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:20:59,039 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 11:20:59,039 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 11:20:59,039 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:20:59,040 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 11:20:59,040 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 11:20:59,044 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 11:20:59,045 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:20:59,045 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 11:20:59,045 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 11:20:59,046 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 11:20:59,046 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 11:20:59,046 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:20:59,047 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 11:20:59,047 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:20:59,047 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 11:20:59,047 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:20:59,048 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 11:20:59,050 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 11:20:59,050 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:20:59,051 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:20:59,051 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:20:59,051 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:20:59,051 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:20:59,052 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:20:59,052 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:20:59,053 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 11:20:59,053 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 11:20:59,054 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 11:20:59,054 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:20:59,055 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:20:59,055 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:20:59,055 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_6ce08fd1-8775-4f47-a9b1-301247a3f429/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce08fd1-8775-4f47-a9b1-301247a3f429/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92f387aee9179611b681311904b53986764751325111bb2d842a850437b442f7 [2024-11-02 11:20:59,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:20:59,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:20:59,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:20:59,418 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:20:59,419 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:20:59,421 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce08fd1-8775-4f47-a9b1-301247a3f429/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/eca-rers2012/Problem03_label01.c Unable to find full path for "g++" [2024-11-02 11:21:01,346 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:21:01,758 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:21:01,758 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce08fd1-8775-4f47-a9b1-301247a3f429/sv-benchmarks/c/eca-rers2012/Problem03_label01.c [2024-11-02 11:21:01,777 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce08fd1-8775-4f47-a9b1-301247a3f429/bin/utaipan-verify-DbMuA5NWw2/data/46f7bf30e/1b7013ce1d2941468b10ccb817e5f78e/FLAGad5c395d3 [2024-11-02 11:21:01,797 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce08fd1-8775-4f47-a9b1-301247a3f429/bin/utaipan-verify-DbMuA5NWw2/data/46f7bf30e/1b7013ce1d2941468b10ccb817e5f78e [2024-11-02 11:21:01,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:21:01,803 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:21:01,805 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:21:01,805 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:21:01,811 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:21:01,814 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:21:01" (1/1) ... [2024-11-02 11:21:01,815 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@610ecd54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:01, skipping insertion in model container [2024-11-02 11:21:01,815 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:21:01" (1/1) ... [2024-11-02 11:21:01,902 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:21:02,580 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_6ce08fd1-8775-4f47-a9b1-301247a3f429/sv-benchmarks/c/eca-rers2012/Problem03_label01.c[59340,59353] [2024-11-02 11:21:02,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:21:02,641 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:21:03,059 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_6ce08fd1-8775-4f47-a9b1-301247a3f429/sv-benchmarks/c/eca-rers2012/Problem03_label01.c[59340,59353] [2024-11-02 11:21:03,071 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:21:03,094 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:21:03,095 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:03 WrapperNode [2024-11-02 11:21:03,095 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:21:03,096 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:21:03,097 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:21:03,097 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:21:03,105 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:03" (1/1) ... [2024-11-02 11:21:03,147 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:03" (1/1) ... [2024-11-02 11:21:03,242 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2024-11-02 11:21:03,242 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:21:03,243 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:21:03,243 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:21:03,244 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:21:03,254 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:03" (1/1) ... [2024-11-02 11:21:03,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:03" (1/1) ... [2024-11-02 11:21:03,265 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:03" (1/1) ... [2024-11-02 11:21:03,265 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:03" (1/1) ... [2024-11-02 11:21:03,304 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:03" (1/1) ... [2024-11-02 11:21:03,317 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:03" (1/1) ... [2024-11-02 11:21:03,338 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:03" (1/1) ... [2024-11-02 11:21:03,347 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:03" (1/1) ... [2024-11-02 11:21:03,363 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:21:03,365 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:21:03,366 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:21:03,366 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:21:03,367 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:03" (1/1) ... [2024-11-02 11:21:03,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:21:03,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce08fd1-8775-4f47-a9b1-301247a3f429/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:21:03,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce08fd1-8775-4f47-a9b1-301247a3f429/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:21:03,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce08fd1-8775-4f47-a9b1-301247a3f429/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:21:03,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 11:21:03,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 11:21:03,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:21:03,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:21:03,555 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:21:03,557 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:21:05,786 INFO L? ?]: Removed 147 outVars from TransFormulas that were not future-live. [2024-11-02 11:21:05,787 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:21:06,229 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:21:06,229 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-02 11:21:06,230 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:21:06 BoogieIcfgContainer [2024-11-02 11:21:06,230 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:21:06,232 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:21:06,232 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:21:06,236 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:21:06,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:21:01" (1/3) ... [2024-11-02 11:21:06,238 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b923832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:21:06, skipping insertion in model container [2024-11-02 11:21:06,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:03" (2/3) ... [2024-11-02 11:21:06,240 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b923832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:21:06, skipping insertion in model container [2024-11-02 11:21:06,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:21:06" (3/3) ... [2024-11-02 11:21:06,242 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label01.c [2024-11-02 11:21:06,265 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:21:06,266 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 11:21:06,348 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:21:06,356 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;@50caaa16, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:21:06,356 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 11:21:06,362 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 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 11:21:06,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-02 11:21:06,380 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:06,380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:21:06,381 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:06,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:06,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1290448053, now seen corresponding path program 1 times [2024-11-02 11:21:06,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:06,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764477702] [2024-11-02 11:21:06,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:06,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:07,259 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 11:21:07,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:07,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764477702] [2024-11-02 11:21:07,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764477702] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:07,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:07,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:21:07,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011748646] [2024-11-02 11:21:07,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:07,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:07,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:07,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:07,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:07,311 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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 11:21:08,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:08,486 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2024-11-02 11:21:08,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:08,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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 143 [2024-11-02 11:21:08,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:08,501 INFO L225 Difference]: With dead ends: 440 [2024-11-02 11:21:08,501 INFO L226 Difference]: Without dead ends: 289 [2024-11-02 11:21:08,504 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:08,508 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:08,509 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 26 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-02 11:21:08,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-02 11:21:08,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2024-11-02 11:21:08,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.90625) internal successors, (549), 288 states have internal predecessors, (549), 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 11:21:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 549 transitions. [2024-11-02 11:21:08,569 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 549 transitions. Word has length 143 [2024-11-02 11:21:08,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:08,570 INFO L471 AbstractCegarLoop]: Abstraction has 289 states and 549 transitions. [2024-11-02 11:21:08,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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 11:21:08,570 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 549 transitions. [2024-11-02 11:21:08,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-02 11:21:08,573 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:08,573 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:21:08,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 11:21:08,574 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:08,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:08,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1984245257, now seen corresponding path program 1 times [2024-11-02 11:21:08,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:08,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750336612] [2024-11-02 11:21:08,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:08,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:21:09,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:09,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750336612] [2024-11-02 11:21:09,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750336612] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:09,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:09,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:21:09,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216428192] [2024-11-02 11:21:09,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:09,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:09,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:09,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:09,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:09,145 INFO L87 Difference]: Start difference. First operand 289 states and 549 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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 11:21:10,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:10,232 INFO L93 Difference]: Finished difference Result 863 states and 1644 transitions. [2024-11-02 11:21:10,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:10,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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 148 [2024-11-02 11:21:10,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:10,243 INFO L225 Difference]: With dead ends: 863 [2024-11-02 11:21:10,243 INFO L226 Difference]: Without dead ends: 575 [2024-11-02 11:21:10,244 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:10,246 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 164 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:10,248 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 49 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-02 11:21:10,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2024-11-02 11:21:10,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2024-11-02 11:21:10,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.740418118466899) internal successors, (999), 574 states have internal predecessors, (999), 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 11:21:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 999 transitions. [2024-11-02 11:21:10,305 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 999 transitions. Word has length 148 [2024-11-02 11:21:10,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:10,305 INFO L471 AbstractCegarLoop]: Abstraction has 575 states and 999 transitions. [2024-11-02 11:21:10,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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 11:21:10,306 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 999 transitions. [2024-11-02 11:21:10,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2024-11-02 11:21:10,314 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:10,314 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:21:10,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 11:21:10,315 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:10,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:10,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1997478779, now seen corresponding path program 1 times [2024-11-02 11:21:10,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:10,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538707073] [2024-11-02 11:21:10,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:10,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 11:21:10,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:10,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538707073] [2024-11-02 11:21:10,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538707073] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:10,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:10,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:21:10,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311688488] [2024-11-02 11:21:10,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:10,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:10,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:10,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:10,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:10,739 INFO L87 Difference]: Start difference. First operand 575 states and 999 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 11:21:11,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:11,636 INFO L93 Difference]: Finished difference Result 1721 states and 2994 transitions. [2024-11-02 11:21:11,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:11,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 163 [2024-11-02 11:21:11,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:11,641 INFO L225 Difference]: With dead ends: 1721 [2024-11-02 11:21:11,641 INFO L226 Difference]: Without dead ends: 1147 [2024-11-02 11:21:11,643 INFO L431 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 [2024-11-02 11:21:11,644 INFO L432 NwaCegarLoop]: 258 mSDtfsCounter, 152 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:11,645 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 261 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-02 11:21:11,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2024-11-02 11:21:11,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2024-11-02 11:21:11,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.4773123909249564) internal successors, (1693), 1146 states have internal predecessors, (1693), 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 11:21:11,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1693 transitions. [2024-11-02 11:21:11,681 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1693 transitions. Word has length 163 [2024-11-02 11:21:11,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:11,682 INFO L471 AbstractCegarLoop]: Abstraction has 1147 states and 1693 transitions. [2024-11-02 11:21:11,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 11:21:11,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1693 transitions. [2024-11-02 11:21:11,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-11-02 11:21:11,687 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:11,687 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:21:11,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 11:21:11,687 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:11,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:11,688 INFO L85 PathProgramCache]: Analyzing trace with hash 710574492, now seen corresponding path program 1 times [2024-11-02 11:21:11,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:11,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710906741] [2024-11-02 11:21:11,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:11,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:21:12,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:12,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710906741] [2024-11-02 11:21:12,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710906741] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:12,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:12,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:21:12,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631717591] [2024-11-02 11:21:12,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:12,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:12,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:12,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:12,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:12,103 INFO L87 Difference]: Start difference. First operand 1147 states and 1693 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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 11:21:13,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:13,008 INFO L93 Difference]: Finished difference Result 3439 states and 5077 transitions. [2024-11-02 11:21:13,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:13,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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 166 [2024-11-02 11:21:13,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:13,017 INFO L225 Difference]: With dead ends: 3439 [2024-11-02 11:21:13,017 INFO L226 Difference]: Without dead ends: 2293 [2024-11-02 11:21:13,019 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:13,021 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 173 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:13,021 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 25 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-02 11:21:13,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2024-11-02 11:21:13,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2291. [2024-11-02 11:21:13,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.45764192139738) internal successors, (3338), 2290 states have internal predecessors, (3338), 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 11:21:13,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3338 transitions. [2024-11-02 11:21:13,106 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3338 transitions. Word has length 166 [2024-11-02 11:21:13,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:13,106 INFO L471 AbstractCegarLoop]: Abstraction has 2291 states and 3338 transitions. [2024-11-02 11:21:13,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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 11:21:13,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3338 transitions. [2024-11-02 11:21:13,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2024-11-02 11:21:13,113 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:13,113 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:21:13,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 11:21:13,114 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:13,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:13,114 INFO L85 PathProgramCache]: Analyzing trace with hash 874836864, now seen corresponding path program 1 times [2024-11-02 11:21:13,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:13,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380444306] [2024-11-02 11:21:13,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:13,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:13,477 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:21:13,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:13,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380444306] [2024-11-02 11:21:13,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380444306] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:13,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:13,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:21:13,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719841936] [2024-11-02 11:21:13,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:13,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:13,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:13,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:13,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:13,481 INFO L87 Difference]: Start difference. First operand 2291 states and 3338 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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 11:21:14,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:14,405 INFO L93 Difference]: Finished difference Result 6869 states and 10011 transitions. [2024-11-02 11:21:14,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:14,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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 169 [2024-11-02 11:21:14,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:14,422 INFO L225 Difference]: With dead ends: 6869 [2024-11-02 11:21:14,422 INFO L226 Difference]: Without dead ends: 4579 [2024-11-02 11:21:14,426 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:14,427 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 129 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:14,428 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 73 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-02 11:21:14,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4579 states. [2024-11-02 11:21:14,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4579 to 4007. [2024-11-02 11:21:14,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4007 states, 4006 states have (on average 1.4772840738891662) internal successors, (5918), 4006 states have internal predecessors, (5918), 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 11:21:14,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4007 states to 4007 states and 5918 transitions. [2024-11-02 11:21:14,561 INFO L78 Accepts]: Start accepts. Automaton has 4007 states and 5918 transitions. Word has length 169 [2024-11-02 11:21:14,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:14,562 INFO L471 AbstractCegarLoop]: Abstraction has 4007 states and 5918 transitions. [2024-11-02 11:21:14,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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 11:21:14,563 INFO L276 IsEmpty]: Start isEmpty. Operand 4007 states and 5918 transitions. [2024-11-02 11:21:14,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2024-11-02 11:21:14,572 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:14,573 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:21:14,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 11:21:14,573 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:14,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:14,574 INFO L85 PathProgramCache]: Analyzing trace with hash -904027132, now seen corresponding path program 1 times [2024-11-02 11:21:14,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:14,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195774160] [2024-11-02 11:21:14,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:14,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 11:21:14,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:14,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195774160] [2024-11-02 11:21:14,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195774160] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:14,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:14,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:21:14,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236398041] [2024-11-02 11:21:14,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:14,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:14,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:14,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:14,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:14,809 INFO L87 Difference]: Start difference. First operand 4007 states and 5918 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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 11:21:15,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:15,307 INFO L93 Difference]: Finished difference Result 8013 states and 11835 transitions. [2024-11-02 11:21:15,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:15,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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 176 [2024-11-02 11:21:15,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:15,323 INFO L225 Difference]: With dead ends: 8013 [2024-11-02 11:21:15,323 INFO L226 Difference]: Without dead ends: 4007 [2024-11-02 11:21:15,327 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:15,328 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 240 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:15,329 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 11:21:15,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2024-11-02 11:21:15,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 4007. [2024-11-02 11:21:15,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4007 states, 4006 states have (on average 1.4231153270094858) internal successors, (5701), 4006 states have internal predecessors, (5701), 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 11:21:15,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4007 states to 4007 states and 5701 transitions. [2024-11-02 11:21:15,472 INFO L78 Accepts]: Start accepts. Automaton has 4007 states and 5701 transitions. Word has length 176 [2024-11-02 11:21:15,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:15,473 INFO L471 AbstractCegarLoop]: Abstraction has 4007 states and 5701 transitions. [2024-11-02 11:21:15,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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 11:21:15,473 INFO L276 IsEmpty]: Start isEmpty. Operand 4007 states and 5701 transitions. [2024-11-02 11:21:15,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2024-11-02 11:21:15,481 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:15,481 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:21:15,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 11:21:15,481 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:15,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:15,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1380707160, now seen corresponding path program 1 times [2024-11-02 11:21:15,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:15,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525731206] [2024-11-02 11:21:15,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:15,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 11:21:15,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:15,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525731206] [2024-11-02 11:21:15,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525731206] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:15,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:15,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:21:15,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307089105] [2024-11-02 11:21:15,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:15,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:15,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:15,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:15,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:15,996 INFO L87 Difference]: Start difference. First operand 4007 states and 5701 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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 11:21:16,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:16,863 INFO L93 Difference]: Finished difference Result 10875 states and 15670 transitions. [2024-11-02 11:21:16,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:16,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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 178 [2024-11-02 11:21:16,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:16,887 INFO L225 Difference]: With dead ends: 10875 [2024-11-02 11:21:16,887 INFO L226 Difference]: Without dead ends: 6869 [2024-11-02 11:21:16,892 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:16,893 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 130 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:16,893 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 74 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-02 11:21:16,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6869 states. [2024-11-02 11:21:17,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6869 to 6724. [2024-11-02 11:21:17,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6724 states, 6723 states have (on average 1.4512866279934553) internal successors, (9757), 6723 states have internal predecessors, (9757), 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 11:21:17,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6724 states to 6724 states and 9757 transitions. [2024-11-02 11:21:17,045 INFO L78 Accepts]: Start accepts. Automaton has 6724 states and 9757 transitions. Word has length 178 [2024-11-02 11:21:17,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:17,046 INFO L471 AbstractCegarLoop]: Abstraction has 6724 states and 9757 transitions. [2024-11-02 11:21:17,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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 11:21:17,047 INFO L276 IsEmpty]: Start isEmpty. Operand 6724 states and 9757 transitions. [2024-11-02 11:21:17,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-11-02 11:21:17,055 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:17,056 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:21:17,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-02 11:21:17,056 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:17,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:17,057 INFO L85 PathProgramCache]: Analyzing trace with hash -805542663, now seen corresponding path program 1 times [2024-11-02 11:21:17,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:17,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746524068] [2024-11-02 11:21:17,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:17,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:17,602 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:21:17,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:17,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746524068] [2024-11-02 11:21:17,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746524068] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:21:17,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153209422] [2024-11-02 11:21:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:17,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:21:17,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce08fd1-8775-4f47-a9b1-301247a3f429/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:21:17,607 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce08fd1-8775-4f47-a9b1-301247a3f429/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:21:17,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ce08fd1-8775-4f47-a9b1-301247a3f429/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 11:21:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:17,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 11:21:17,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:21:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 11:21:18,155 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:21:18,463 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 11:21:18,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153209422] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:21:18,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1220400887] [2024-11-02 11:21:18,503 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2024-11-02 11:21:18,503 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:21:18,508 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:21:18,515 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:21:18,515 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs