./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.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_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/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_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/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_85901022-86a3-4803-aac2-6b035d667a1c/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 24cc882af4ec42ba94c424c5a1ed92d402543c0fe2bf17d3fca0ca1cd73500b7 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:34:49,031 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:34:49,129 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:34:49,136 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:34:49,137 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:34:49,185 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:34:49,186 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:34:49,186 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:34:49,187 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:34:49,187 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:34:49,188 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:34:49,188 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:34:49,188 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:34:49,189 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:34:49,189 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:34:49,190 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:34:49,190 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:34:49,191 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:34:49,191 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:34:49,191 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:34:49,192 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:34:49,193 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:34:49,193 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:34:49,194 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:34:49,194 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:34:49,194 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:34:49,195 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:34:49,195 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:34:49,195 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:34:49,195 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:34:49,196 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:34:49,203 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:34:49,203 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:34:49,204 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:34:49,204 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:34:49,205 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:34:49,205 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:34:49,205 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:34:49,206 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:34:49,206 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:34:49,206 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:34:49,207 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:34:49,207 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:34:49,207 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:34:49,208 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:34:49,208 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:34:49,208 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:34:49,208 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_85901022-86a3-4803-aac2-6b035d667a1c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24cc882af4ec42ba94c424c5a1ed92d402543c0fe2bf17d3fca0ca1cd73500b7 [2024-11-02 12:34:49,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:34:49,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:34:49,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:34:49,505 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:34:49,505 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:34:49,506 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c Unable to find full path for "g++" [2024-11-02 12:34:51,558 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:34:51,730 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:34:51,730 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2024-11-02 12:34:51,737 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/data/e2d46c480/df88909e60fe4d6ea35488ed65e7e4d7/FLAGccb068fb2 [2024-11-02 12:34:51,757 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/data/e2d46c480/df88909e60fe4d6ea35488ed65e7e4d7 [2024-11-02 12:34:51,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:34:51,760 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:34:51,762 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:34:51,762 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:34:51,767 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:34:51,768 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:34:51" (1/1) ... [2024-11-02 12:34:51,769 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bb89c51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:51, skipping insertion in model container [2024-11-02 12:34:51,769 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:34:51" (1/1) ... [2024-11-02 12:34:51,791 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:34:51,981 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_85901022-86a3-4803-aac2-6b035d667a1c/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c[946,959] [2024-11-02 12:34:51,986 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:34:51,996 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:34:52,010 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_85901022-86a3-4803-aac2-6b035d667a1c/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c[946,959] [2024-11-02 12:34:52,010 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:34:52,027 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:34:52,028 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:52 WrapperNode [2024-11-02 12:34:52,028 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:34:52,029 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:34:52,029 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:34:52,029 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:34:52,038 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:52" (1/1) ... [2024-11-02 12:34:52,046 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:52" (1/1) ... [2024-11-02 12:34:52,065 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-11-02 12:34:52,065 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:34:52,066 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:34:52,066 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:34:52,066 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:34:52,073 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:52" (1/1) ... [2024-11-02 12:34:52,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:52" (1/1) ... [2024-11-02 12:34:52,074 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:52" (1/1) ... [2024-11-02 12:34:52,075 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:52" (1/1) ... [2024-11-02 12:34:52,078 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:52" (1/1) ... [2024-11-02 12:34:52,080 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:52" (1/1) ... [2024-11-02 12:34:52,081 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:52" (1/1) ... [2024-11-02 12:34:52,082 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:52" (1/1) ... [2024-11-02 12:34:52,083 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:34:52,084 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:34:52,085 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:34:52,085 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:34:52,086 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:52" (1/1) ... [2024-11-02 12:34:52,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:34:52,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:34:52,121 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:34:52,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:34:52,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:34:52,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:34:52,164 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-11-02 12:34:52,165 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-11-02 12:34:52,165 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-11-02 12:34:52,165 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-11-02 12:34:52,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:34:52,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:34:52,246 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:34:52,250 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:34:52,432 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-11-02 12:34:52,432 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:34:52,476 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:34:52,477 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-02 12:34:52,478 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:34:52 BoogieIcfgContainer [2024-11-02 12:34:52,478 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:34:52,482 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:34:52,482 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:34:52,486 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:34:52,486 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:34:51" (1/3) ... [2024-11-02 12:34:52,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb60d1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:34:52, skipping insertion in model container [2024-11-02 12:34:52,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:34:52" (2/3) ... [2024-11-02 12:34:52,489 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb60d1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:34:52, skipping insertion in model container [2024-11-02 12:34:52,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:34:52" (3/3) ... [2024-11-02 12:34:52,490 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2024-11-02 12:34:52,511 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:34:52,512 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:34:52,597 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:34:52,607 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;@1767a6f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:34:52,607 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:34:52,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-02 12:34:52,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-02 12:34:52,620 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:34:52,621 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:34:52,622 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:34:52,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:34:52,629 INFO L85 PathProgramCache]: Analyzing trace with hash -389521846, now seen corresponding path program 1 times [2024-11-02 12:34:52,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:34:52,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096947746] [2024-11-02 12:34:52,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:52,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:34:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:52,923 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 12:34:52,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:34:52,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096947746] [2024-11-02 12:34:52,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096947746] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:34:52,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:34:52,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-02 12:34:52,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429240083] [2024-11-02 12:34:52,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:34:52,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:34:52,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:34:52,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:34:52,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:34:52,962 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:34:53,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:34:53,074 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2024-11-02 12:34:53,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:34:53,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2024-11-02 12:34:53,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:34:53,085 INFO L225 Difference]: With dead ends: 36 [2024-11-02 12:34:53,086 INFO L226 Difference]: Without dead ends: 28 [2024-11-02 12:34:53,089 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:34:53,092 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:34:53,094 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 80 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:34:53,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-02 12:34:53,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2024-11-02 12:34:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-02 12:34:53,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2024-11-02 12:34:53,136 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2024-11-02 12:34:53,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:34:53,136 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2024-11-02 12:34:53,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:34:53,137 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2024-11-02 12:34:53,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-02 12:34:53,138 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:34:53,138 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:34:53,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:34:53,139 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:34:53,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:34:53,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1524884472, now seen corresponding path program 1 times [2024-11-02 12:34:53,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:34:53,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369529912] [2024-11-02 12:34:53,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:53,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:34:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:53,279 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 12:34:53,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:34:53,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369529912] [2024-11-02 12:34:53,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369529912] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:34:53,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:34:53,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-02 12:34:53,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069252974] [2024-11-02 12:34:53,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:34:53,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:34:53,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:34:53,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:34:53,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:34:53,286 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:34:53,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:34:53,370 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2024-11-02 12:34:53,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:34:53,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-11-02 12:34:53,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:34:53,372 INFO L225 Difference]: With dead ends: 32 [2024-11-02 12:34:53,373 INFO L226 Difference]: Without dead ends: 28 [2024-11-02 12:34:53,373 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:34:53,375 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:34:53,377 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 73 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:34:53,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-02 12:34:53,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2024-11-02 12:34:53,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-02 12:34:53,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2024-11-02 12:34:53,392 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2024-11-02 12:34:53,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:34:53,392 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2024-11-02 12:34:53,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:34:53,392 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2024-11-02 12:34:53,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-02 12:34:53,395 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:34:53,395 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:34:53,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:34:53,396 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:34:53,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:34:53,398 INFO L85 PathProgramCache]: Analyzing trace with hash 741502751, now seen corresponding path program 1 times [2024-11-02 12:34:53,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:34:53,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728031585] [2024-11-02 12:34:53,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:53,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:34:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:34:53,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:34:53,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728031585] [2024-11-02 12:34:53,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728031585] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:34:53,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222657472] [2024-11-02 12:34:53,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:53,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:34:53,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:34:53,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:34:53,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:34:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:53,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-02 12:34:53,642 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:34:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:34:53,805 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:34:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:34:54,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222657472] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:34:54,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1002781005] [2024-11-02 12:34:54,148 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-02 12:34:54,149 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:34:54,153 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:34:54,160 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:34:54,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:34:54,304 INFO L197 IcfgInterpreter]: Interpreting procedure fibo1 with input of size 35 for LOIs [2024-11-02 12:34:54,394 INFO L197 IcfgInterpreter]: Interpreting procedure fibo2 with input of size 35 for LOIs [2024-11-02 12:34:54,405 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:34:54,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1002781005] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:34:54,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:34:54,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 7, 7] total 17 [2024-11-02 12:34:54,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598301403] [2024-11-02 12:34:54,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:34:54,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:34:54,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:34:54,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:34:54,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-11-02 12:34:54,747 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:34:54,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:34:54,911 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2024-11-02 12:34:54,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:34:54,913 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2024-11-02 12:34:54,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:34:54,914 INFO L225 Difference]: With dead ends: 68 [2024-11-02 12:34:54,914 INFO L226 Difference]: Without dead ends: 44 [2024-11-02 12:34:54,915 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-11-02 12:34:54,916 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 16 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:34:54,916 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 101 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:34:54,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-02 12:34:54,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-11-02 12:34:54,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-02 12:34:54,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2024-11-02 12:34:54,939 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 22 [2024-11-02 12:34:54,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:34:54,940 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2024-11-02 12:34:54,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:34:54,941 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2024-11-02 12:34:54,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-02 12:34:54,944 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:34:54,945 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 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] [2024-11-02 12:34:54,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 12:34:55,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:34:55,149 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:34:55,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:34:55,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1754399412, now seen corresponding path program 1 times [2024-11-02 12:34:55,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:34:55,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253248673] [2024-11-02 12:34:55,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:55,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:34:55,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 12:34:55,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:34:55,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253248673] [2024-11-02 12:34:55,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253248673] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:34:55,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098785912] [2024-11-02 12:34:55,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:55,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:34:55,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:34:55,379 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:34:55,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:34:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:55,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 12:34:55,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:34:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 12:34:55,595 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:34:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-02 12:34:56,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098785912] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:34:56,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [535062042] [2024-11-02 12:34:56,092 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-02 12:34:56,092 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:34:56,097 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-02 12:34:56,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:34:56,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2024-11-02 12:34:56,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514424285] [2024-11-02 12:34:56,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:34:56,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-02 12:34:56,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:34:56,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-02 12:34:56,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-02 12:34:56,102 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 14 states, 11 states have (on average 4.0) internal successors, (44), 14 states have internal predecessors, (44), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-02 12:34:56,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:34:56,332 INFO L93 Difference]: Finished difference Result 85 states and 121 transitions. [2024-11-02 12:34:56,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-02 12:34:56,333 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.0) internal successors, (44), 14 states have internal predecessors, (44), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 35 [2024-11-02 12:34:56,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:34:56,334 INFO L225 Difference]: With dead ends: 85 [2024-11-02 12:34:56,335 INFO L226 Difference]: Without dead ends: 53 [2024-11-02 12:34:56,336 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-02 12:34:56,339 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:34:56,340 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 140 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:34:56,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-02 12:34:56,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2024-11-02 12:34:56,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2024-11-02 12:34:56,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-11-02 12:34:56,358 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 35 [2024-11-02 12:34:56,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:34:56,358 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-11-02 12:34:56,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.0) internal successors, (44), 14 states have internal predecessors, (44), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-02 12:34:56,359 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-11-02 12:34:56,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-02 12:34:56,361 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:34:56,362 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 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] [2024-11-02 12:34:56,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:34:56,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:34:56,566 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:34:56,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:34:56,566 INFO L85 PathProgramCache]: Analyzing trace with hash 2101254926, now seen corresponding path program 1 times [2024-11-02 12:34:56,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:34:56,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439240232] [2024-11-02 12:34:56,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:56,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:34:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 12:34:56,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:34:56,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439240232] [2024-11-02 12:34:56,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439240232] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:34:56,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888182068] [2024-11-02 12:34:56,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:56,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:34:56,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:34:56,845 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:34:56,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:34:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:56,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 12:34:56,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:34:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 12:34:57,033 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:34:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-02 12:34:57,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888182068] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:34:57,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [766958773] [2024-11-02 12:34:57,530 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-02 12:34:57,530 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:34:57,531 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-02 12:34:57,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:34:57,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2024-11-02 12:34:57,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131133480] [2024-11-02 12:34:57,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:34:57,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-02 12:34:57,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:34:57,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-02 12:34:57,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-02 12:34:57,535 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 18 states, 16 states have (on average 3.0625) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-02 12:34:58,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:34:58,103 INFO L93 Difference]: Finished difference Result 123 states and 210 transitions. [2024-11-02 12:34:58,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-02 12:34:58,103 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.0625) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2024-11-02 12:34:58,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:34:58,106 INFO L225 Difference]: With dead ends: 123 [2024-11-02 12:34:58,106 INFO L226 Difference]: Without dead ends: 79 [2024-11-02 12:34:58,107 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2024-11-02 12:34:58,110 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 12:34:58,110 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 225 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 12:34:58,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-02 12:34:58,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2024-11-02 12:34:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.15) internal successors, (46), 43 states have internal predecessors, (46), 14 states have call successors, (14), 5 states have call predecessors, (14), 8 states have return successors, (31), 14 states have call predecessors, (31), 14 states have call successors, (31) [2024-11-02 12:34:58,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 91 transitions. [2024-11-02 12:34:58,132 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 91 transitions. Word has length 36 [2024-11-02 12:34:58,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:34:58,132 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 91 transitions. [2024-11-02 12:34:58,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.0625) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-02 12:34:58,133 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 91 transitions. [2024-11-02 12:34:58,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-02 12:34:58,135 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:34:58,135 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:34:58,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 12:34:58,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:34:58,340 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:34:58,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:34:58,340 INFO L85 PathProgramCache]: Analyzing trace with hash 644290867, now seen corresponding path program 1 times [2024-11-02 12:34:58,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:34:58,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618145114] [2024-11-02 12:34:58,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:58,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:34:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:58,488 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 12:34:58,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:34:58,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618145114] [2024-11-02 12:34:58,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618145114] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:34:58,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390714751] [2024-11-02 12:34:58,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:58,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:34:58,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:34:58,491 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:34:58,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:34:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:34:58,574 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-02 12:34:58,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:34:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-02 12:34:58,689 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:34:59,421 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-02 12:34:59,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390714751] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:34:59,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1835648576] [2024-11-02 12:34:59,426 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-02 12:34:59,427 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:34:59,427 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-02 12:34:59,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:34:59,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2024-11-02 12:34:59,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765850261] [2024-11-02 12:34:59,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:34:59,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-02 12:34:59,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:34:59,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-02 12:34:59,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-11-02 12:34:59,433 INFO L87 Difference]: Start difference. First operand 63 states and 91 transitions. Second operand has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 11 states have call successors, (13), 1 states have call predecessors, (13), 8 states have return successors, (17), 8 states have call predecessors, (17), 11 states have call successors, (17) [2024-11-02 12:34:59,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:34:59,719 INFO L93 Difference]: Finished difference Result 121 states and 210 transitions. [2024-11-02 12:34:59,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-02 12:34:59,720 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 11 states have call successors, (13), 1 states have call predecessors, (13), 8 states have return successors, (17), 8 states have call predecessors, (17), 11 states have call successors, (17) Word has length 50 [2024-11-02 12:34:59,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:34:59,723 INFO L225 Difference]: With dead ends: 121 [2024-11-02 12:34:59,723 INFO L226 Difference]: Without dead ends: 99 [2024-11-02 12:34:59,726 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2024-11-02 12:34:59,731 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:34:59,731 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 110 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:34:59,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-02 12:34:59,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 72. [2024-11-02 12:34:59,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 49 states have internal predecessors, (52), 14 states have call successors, (14), 5 states have call predecessors, (14), 11 states have return successors, (39), 17 states have call predecessors, (39), 14 states have call successors, (39) [2024-11-02 12:34:59,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 105 transitions. [2024-11-02 12:34:59,754 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 105 transitions. Word has length 50 [2024-11-02 12:34:59,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:34:59,754 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 105 transitions. [2024-11-02 12:34:59,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 11 states have call successors, (13), 1 states have call predecessors, (13), 8 states have return successors, (17), 8 states have call predecessors, (17), 11 states have call successors, (17) [2024-11-02 12:34:59,755 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 105 transitions. [2024-11-02 12:34:59,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-02 12:34:59,758 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:34:59,758 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:34:59,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-02 12:34:59,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:34:59,960 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:34:59,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:34:59,961 INFO L85 PathProgramCache]: Analyzing trace with hash -988387816, now seen corresponding path program 1 times [2024-11-02 12:34:59,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:34:59,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246395281] [2024-11-02 12:34:59,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:34:59,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:34:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:00,179 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2024-11-02 12:35:00,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:00,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246395281] [2024-11-02 12:35:00,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246395281] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:35:00,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457348010] [2024-11-02 12:35:00,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:00,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:00,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:35:00,182 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:35:00,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 12:35:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:00,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 12:35:00,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:35:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2024-11-02 12:35:00,313 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:35:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-02 12:35:00,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457348010] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:35:00,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [436868406] [2024-11-02 12:35:00,786 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-02 12:35:00,786 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:35:00,787 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-02 12:35:00,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:35:00,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 11 [2024-11-02 12:35:00,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290511305] [2024-11-02 12:35:00,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:35:00,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-02 12:35:00,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:00,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-02 12:35:00,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-02 12:35:00,790 INFO L87 Difference]: Start difference. First operand 72 states and 105 transitions. Second operand has 11 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 7 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-02 12:35:00,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:00,939 INFO L93 Difference]: Finished difference Result 101 states and 160 transitions. [2024-11-02 12:35:00,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 12:35:00,940 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 7 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 92 [2024-11-02 12:35:00,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:00,942 INFO L225 Difference]: With dead ends: 101 [2024-11-02 12:35:00,943 INFO L226 Difference]: Without dead ends: 89 [2024-11-02 12:35:00,943 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-02 12:35:00,944 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:00,944 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 106 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:35:00,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-02 12:35:00,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2024-11-02 12:35:00,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 47 states have (on average 1.127659574468085) internal successors, (53), 51 states have internal predecessors, (53), 14 states have call successors, (14), 5 states have call predecessors, (14), 12 states have return successors, (42), 17 states have call predecessors, (42), 14 states have call successors, (42) [2024-11-02 12:35:00,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 109 transitions. [2024-11-02 12:35:00,962 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 109 transitions. Word has length 92 [2024-11-02 12:35:00,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:00,963 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 109 transitions. [2024-11-02 12:35:00,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 7 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-02 12:35:00,963 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 109 transitions. [2024-11-02 12:35:00,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-02 12:35:00,966 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:00,966 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:00,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-02 12:35:01,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:01,171 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:35:01,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:01,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1400554095, now seen corresponding path program 1 times [2024-11-02 12:35:01,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:01,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300393008] [2024-11-02 12:35:01,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:01,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 68 proven. 53 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-11-02 12:35:01,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:01,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300393008] [2024-11-02 12:35:01,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300393008] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:35:01,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724540721] [2024-11-02 12:35:01,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:01,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:01,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:35:01,449 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:35:01,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-02 12:35:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:01,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-02 12:35:01,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:35:01,651 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 76 proven. 62 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-11-02 12:35:01,652 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:35:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 76 proven. 70 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-11-02 12:35:02,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724540721] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:35:02,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [503331907] [2024-11-02 12:35:02,780 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-02 12:35:02,780 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:35:02,781 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-02 12:35:02,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:35:02,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 13] total 18 [2024-11-02 12:35:02,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991424755] [2024-11-02 12:35:02,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:35:02,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-02 12:35:02,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:02,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-02 12:35:02,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2024-11-02 12:35:02,784 INFO L87 Difference]: Start difference. First operand 74 states and 109 transitions. Second operand has 18 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 18 states have internal predecessors, (59), 12 states have call successors, (18), 1 states have call predecessors, (18), 6 states have return successors, (20), 9 states have call predecessors, (20), 12 states have call successors, (20) [2024-11-02 12:35:03,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:03,088 INFO L93 Difference]: Finished difference Result 124 states and 219 transitions. [2024-11-02 12:35:03,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-02 12:35:03,089 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 18 states have internal predecessors, (59), 12 states have call successors, (18), 1 states have call predecessors, (18), 6 states have return successors, (20), 9 states have call predecessors, (20), 12 states have call successors, (20) Word has length 106 [2024-11-02 12:35:03,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:03,091 INFO L225 Difference]: With dead ends: 124 [2024-11-02 12:35:03,091 INFO L226 Difference]: Without dead ends: 77 [2024-11-02 12:35:03,092 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 201 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2024-11-02 12:35:03,093 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 16 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:03,093 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 270 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:35:03,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-02 12:35:03,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-11-02 12:35:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 50 states have (on average 1.12) internal successors, (56), 53 states have internal predecessors, (56), 13 states have call successors, (13), 6 states have call predecessors, (13), 13 states have return successors, (36), 17 states have call predecessors, (36), 13 states have call successors, (36) [2024-11-02 12:35:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 105 transitions. [2024-11-02 12:35:03,110 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 105 transitions. Word has length 106 [2024-11-02 12:35:03,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:03,111 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 105 transitions. [2024-11-02 12:35:03,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 18 states have internal predecessors, (59), 12 states have call successors, (18), 1 states have call predecessors, (18), 6 states have return successors, (20), 9 states have call predecessors, (20), 12 states have call successors, (20) [2024-11-02 12:35:03,111 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 105 transitions. [2024-11-02 12:35:03,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-02 12:35:03,113 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:03,114 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:03,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-02 12:35:03,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:03,344 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:35:03,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:03,345 INFO L85 PathProgramCache]: Analyzing trace with hash -2049877354, now seen corresponding path program 2 times [2024-11-02 12:35:03,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:03,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911197393] [2024-11-02 12:35:03,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:03,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:03,518 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2024-11-02 12:35:03,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:03,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911197393] [2024-11-02 12:35:03,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911197393] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:35:03,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748196090] [2024-11-02 12:35:03,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:35:03,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:03,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:35:03,521 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:35:03,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-02 12:35:03,600 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-02 12:35:03,601 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:35:03,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-02 12:35:03,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:35:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 64 proven. 4 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2024-11-02 12:35:03,676 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:35:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 64 proven. 4 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2024-11-02 12:35:04,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748196090] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:35:04,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1517547438] [2024-11-02 12:35:04,044 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-02 12:35:04,044 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:35:04,045 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-02 12:35:04,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:35:04,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-11-02 12:35:04,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365149531] [2024-11-02 12:35:04,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:35:04,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-02 12:35:04,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:04,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-02 12:35:04,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-02 12:35:04,052 INFO L87 Difference]: Start difference. First operand 77 states and 105 transitions. Second operand has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2024-11-02 12:35:04,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:04,401 INFO L93 Difference]: Finished difference Result 164 states and 250 transitions. [2024-11-02 12:35:04,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-02 12:35:04,402 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 92 [2024-11-02 12:35:04,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:04,405 INFO L225 Difference]: With dead ends: 164 [2024-11-02 12:35:04,406 INFO L226 Difference]: Without dead ends: 96 [2024-11-02 12:35:04,407 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 177 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2024-11-02 12:35:04,408 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:04,408 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 125 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:35:04,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-02 12:35:04,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2024-11-02 12:35:04,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 63 states have internal predecessors, (70), 16 states have call successors, (16), 9 states have call predecessors, (16), 14 states have return successors, (40), 20 states have call predecessors, (40), 16 states have call successors, (40) [2024-11-02 12:35:04,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 126 transitions. [2024-11-02 12:35:04,447 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 126 transitions. Word has length 92 [2024-11-02 12:35:04,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:04,448 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 126 transitions. [2024-11-02 12:35:04,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2024-11-02 12:35:04,448 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 126 transitions. [2024-11-02 12:35:04,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-02 12:35:04,454 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:04,454 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:04,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-02 12:35:04,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:04,655 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:35:04,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:04,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1780776373, now seen corresponding path program 3 times [2024-11-02 12:35:04,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:04,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554409656] [2024-11-02 12:35:04,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:04,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:04,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-11-02 12:35:05,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:05,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554409656] [2024-11-02 12:35:05,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554409656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:35:05,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084488220] [2024-11-02 12:35:05,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:35:05,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:05,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:35:05,474 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:35:05,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-02 12:35:05,571 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:35:05,571 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:35:05,573 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-02 12:35:05,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:35:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-11-02 12:35:05,765 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:35:06,484 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-11-02 12:35:06,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084488220] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:35:06,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1647506399] [2024-11-02 12:35:06,489 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-02 12:35:06,489 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:35:06,490 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-02 12:35:06,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:35:06,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 28 [2024-11-02 12:35:06,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696160843] [2024-11-02 12:35:06,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:35:06,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-02 12:35:06,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:06,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-02 12:35:06,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2024-11-02 12:35:06,495 INFO L87 Difference]: Start difference. First operand 93 states and 126 transitions. Second operand has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 15 states have internal predecessors, (38), 5 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (17), 17 states have call predecessors, (17), 5 states have call successors, (17) [2024-11-02 12:35:06,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:06,904 INFO L93 Difference]: Finished difference Result 154 states and 230 transitions. [2024-11-02 12:35:06,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-02 12:35:06,905 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 15 states have internal predecessors, (38), 5 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (17), 17 states have call predecessors, (17), 5 states have call successors, (17) Word has length 105 [2024-11-02 12:35:06,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:06,908 INFO L225 Difference]: With dead ends: 154 [2024-11-02 12:35:06,908 INFO L226 Difference]: Without dead ends: 144 [2024-11-02 12:35:06,909 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2024-11-02 12:35:06,910 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:06,911 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1046 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:35:06,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-02 12:35:06,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 121. [2024-11-02 12:35:06,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 80 states have internal predecessors, (87), 21 states have call successors, (21), 9 states have call predecessors, (21), 20 states have return successors, (69), 31 states have call predecessors, (69), 21 states have call successors, (69) [2024-11-02 12:35:06,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 177 transitions. [2024-11-02 12:35:06,959 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 177 transitions. Word has length 105 [2024-11-02 12:35:06,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:06,960 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 177 transitions. [2024-11-02 12:35:06,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 15 states have internal predecessors, (38), 5 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (17), 17 states have call predecessors, (17), 5 states have call successors, (17) [2024-11-02 12:35:06,960 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 177 transitions. [2024-11-02 12:35:06,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-02 12:35:06,963 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:06,963 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:06,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-02 12:35:07,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-02 12:35:07,168 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:35:07,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:07,168 INFO L85 PathProgramCache]: Analyzing trace with hash 27585007, now seen corresponding path program 4 times [2024-11-02 12:35:07,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:07,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611160372] [2024-11-02 12:35:07,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:07,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 55 proven. 59 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2024-11-02 12:35:07,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:07,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611160372] [2024-11-02 12:35:07,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611160372] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:35:07,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282435517] [2024-11-02 12:35:07,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-02 12:35:07,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:07,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:35:07,333 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:35:07,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-02 12:35:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:07,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-02 12:35:07,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:35:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 55 proven. 59 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2024-11-02 12:35:07,493 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:35:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 57 proven. 61 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-02 12:35:08,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282435517] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:35:08,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1172485797] [2024-11-02 12:35:08,206 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-02 12:35:08,206 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:35:08,207 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-02 12:35:08,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:35:08,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 13 [2024-11-02 12:35:08,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346882005] [2024-11-02 12:35:08,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:35:08,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-02 12:35:08,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:08,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-02 12:35:08,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-11-02 12:35:08,210 INFO L87 Difference]: Start difference. First operand 121 states and 177 transitions. Second operand has 13 states, 12 states have (on average 4.25) internal successors, (51), 13 states have internal predecessors, (51), 8 states have call successors, (15), 1 states have call predecessors, (15), 5 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-02 12:35:08,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:08,444 INFO L93 Difference]: Finished difference Result 154 states and 242 transitions. [2024-11-02 12:35:08,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-02 12:35:08,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 13 states have internal predecessors, (51), 8 states have call successors, (15), 1 states have call predecessors, (15), 5 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) Word has length 105 [2024-11-02 12:35:08,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:08,446 INFO L225 Difference]: With dead ends: 154 [2024-11-02 12:35:08,447 INFO L226 Difference]: Without dead ends: 124 [2024-11-02 12:35:08,448 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 203 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-11-02 12:35:08,448 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:08,449 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 215 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:35:08,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-02 12:35:08,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2024-11-02 12:35:08,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.103896103896104) internal successors, (85), 78 states have internal predecessors, (85), 21 states have call successors, (21), 9 states have call predecessors, (21), 19 states have return successors, (63), 30 states have call predecessors, (63), 21 states have call successors, (63) [2024-11-02 12:35:08,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 169 transitions. [2024-11-02 12:35:08,471 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 169 transitions. Word has length 105 [2024-11-02 12:35:08,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:08,471 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 169 transitions. [2024-11-02 12:35:08,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 13 states have internal predecessors, (51), 8 states have call successors, (15), 1 states have call predecessors, (15), 5 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-02 12:35:08,472 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 169 transitions. [2024-11-02 12:35:08,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-02 12:35:08,474 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:08,474 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:08,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-02 12:35:08,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-02 12:35:08,675 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:35:08,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:08,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1373357829, now seen corresponding path program 5 times [2024-11-02 12:35:08,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:08,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799152742] [2024-11-02 12:35:08,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:08,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:08,835 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 44 proven. 31 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2024-11-02 12:35:08,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:08,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799152742] [2024-11-02 12:35:08,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799152742] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:35:08,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452173262] [2024-11-02 12:35:08,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:35:08,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:08,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:35:08,838 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:35:08,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-02 12:35:08,922 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-02 12:35:08,922 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:35:08,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 12:35:08,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:35:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 96 proven. 7 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2024-11-02 12:35:09,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:35:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 96 proven. 7 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2024-11-02 12:35:09,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452173262] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:35:09,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1095044901] [2024-11-02 12:35:09,492 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-02 12:35:09,492 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:35:09,493 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-02 12:35:09,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:35:09,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 14 [2024-11-02 12:35:09,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044739831] [2024-11-02 12:35:09,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:35:09,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-02 12:35:09,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:09,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-02 12:35:09,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-02 12:35:09,499 INFO L87 Difference]: Start difference. First operand 118 states and 169 transitions. Second operand has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 14 states have internal predecessors, (48), 7 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (15), 4 states have call predecessors, (15), 7 states have call successors, (15) [2024-11-02 12:35:09,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:09,701 INFO L93 Difference]: Finished difference Result 200 states and 298 transitions. [2024-11-02 12:35:09,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-02 12:35:09,703 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 14 states have internal predecessors, (48), 7 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (15), 4 states have call predecessors, (15), 7 states have call successors, (15) Word has length 103 [2024-11-02 12:35:09,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:09,704 INFO L225 Difference]: With dead ends: 200 [2024-11-02 12:35:09,704 INFO L226 Difference]: Without dead ends: 99 [2024-11-02 12:35:09,705 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 195 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2024-11-02 12:35:09,707 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:09,708 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 138 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:35:09,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-02 12:35:09,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-11-02 12:35:09,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 66 states have internal predecessors, (71), 17 states have call successors, (17), 8 states have call predecessors, (17), 16 states have return successors, (46), 24 states have call predecessors, (46), 17 states have call successors, (46) [2024-11-02 12:35:09,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 134 transitions. [2024-11-02 12:35:09,729 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 134 transitions. Word has length 103 [2024-11-02 12:35:09,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:09,730 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 134 transitions. [2024-11-02 12:35:09,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 14 states have internal predecessors, (48), 7 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (15), 4 states have call predecessors, (15), 7 states have call successors, (15) [2024-11-02 12:35:09,730 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 134 transitions. [2024-11-02 12:35:09,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-02 12:35:09,732 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:09,732 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:09,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-02 12:35:09,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-02 12:35:09,933 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:35:09,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:09,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1849668921, now seen corresponding path program 6 times [2024-11-02 12:35:09,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:09,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600876153] [2024-11-02 12:35:09,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:09,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 96 proven. 18 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2024-11-02 12:35:10,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:10,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600876153] [2024-11-02 12:35:10,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600876153] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:35:10,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47319235] [2024-11-02 12:35:10,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:35:10,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:10,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:35:10,084 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:35:10,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-02 12:35:10,170 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:35:10,170 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:35:10,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-02 12:35:10,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:35:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 74 proven. 102 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-02 12:35:10,333 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:35:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 74 proven. 108 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2024-11-02 12:35:11,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47319235] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:35:11,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2010051904] [2024-11-02 12:35:11,555 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-02 12:35:11,555 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:35:11,555 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-02 12:35:11,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:35:11,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 17] total 23 [2024-11-02 12:35:11,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492021321] [2024-11-02 12:35:11,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:35:11,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-02 12:35:11,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:11,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-02 12:35:11,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2024-11-02 12:35:11,559 INFO L87 Difference]: Start difference. First operand 99 states and 134 transitions. Second operand has 23 states, 22 states have (on average 3.590909090909091) internal successors, (79), 23 states have internal predecessors, (79), 16 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (25), 11 states have call predecessors, (25), 16 states have call successors, (25) [2024-11-02 12:35:12,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:12,246 INFO L93 Difference]: Finished difference Result 228 states and 360 transitions. [2024-11-02 12:35:12,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-02 12:35:12,247 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.590909090909091) internal successors, (79), 23 states have internal predecessors, (79), 16 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (25), 11 states have call predecessors, (25), 16 states have call successors, (25) Word has length 106 [2024-11-02 12:35:12,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:12,250 INFO L225 Difference]: With dead ends: 228 [2024-11-02 12:35:12,250 INFO L226 Difference]: Without dead ends: 124 [2024-11-02 12:35:12,252 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 192 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2024-11-02 12:35:12,254 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 96 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:12,255 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 337 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 12:35:12,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-02 12:35:12,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 115. [2024-11-02 12:35:12,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 79 states have (on average 1.139240506329114) internal successors, (90), 76 states have internal predecessors, (90), 20 states have call successors, (20), 14 states have call predecessors, (20), 15 states have return successors, (49), 24 states have call predecessors, (49), 20 states have call successors, (49) [2024-11-02 12:35:12,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 159 transitions. [2024-11-02 12:35:12,277 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 159 transitions. Word has length 106 [2024-11-02 12:35:12,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:12,278 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 159 transitions. [2024-11-02 12:35:12,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.590909090909091) internal successors, (79), 23 states have internal predecessors, (79), 16 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (25), 11 states have call predecessors, (25), 16 states have call successors, (25) [2024-11-02 12:35:12,278 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 159 transitions. [2024-11-02 12:35:12,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-02 12:35:12,282 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:12,282 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:12,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-02 12:35:12,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:12,487 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:35:12,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:12,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1334835348, now seen corresponding path program 1 times [2024-11-02 12:35:12,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:12,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290430371] [2024-11-02 12:35:12,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:12,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 46 proven. 118 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2024-11-02 12:35:12,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:12,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290430371] [2024-11-02 12:35:12,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290430371] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:35:12,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712383957] [2024-11-02 12:35:12,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:12,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:12,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:35:12,756 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:35:12,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-02 12:35:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:12,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-02 12:35:12,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:35:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 133 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2024-11-02 12:35:12,950 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:35:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 147 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2024-11-02 12:35:14,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712383957] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:35:14,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1874915139] [2024-11-02 12:35:14,413 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-02 12:35:14,414 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:35:14,414 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-02 12:35:14,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:35:14,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 15] total 20 [2024-11-02 12:35:14,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801302665] [2024-11-02 12:35:14,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:35:14,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-02 12:35:14,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:14,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-02 12:35:14,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2024-11-02 12:35:14,417 INFO L87 Difference]: Start difference. First operand 115 states and 159 transitions. Second operand has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 15 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 8 states have call predecessors, (22), 15 states have call successors, (22) [2024-11-02 12:35:14,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:14,674 INFO L93 Difference]: Finished difference Result 120 states and 164 transitions. [2024-11-02 12:35:14,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-02 12:35:14,675 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 15 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 8 states have call predecessors, (22), 15 states have call successors, (22) Word has length 119 [2024-11-02 12:35:14,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:14,676 INFO L225 Difference]: With dead ends: 120 [2024-11-02 12:35:14,676 INFO L226 Difference]: Without dead ends: 0 [2024-11-02 12:35:14,677 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 226 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2024-11-02 12:35:14,678 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 22 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:14,678 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 209 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:35:14,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-02 12:35:14,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-02 12:35:14,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 12:35:14,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-02 12:35:14,681 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 119 [2024-11-02 12:35:14,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:14,681 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-02 12:35:14,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 15 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 8 states have call predecessors, (22), 15 states have call successors, (22) [2024-11-02 12:35:14,681 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-02 12:35:14,682 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-02 12:35:14,684 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-02 12:35:14,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-02 12:35:14,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85901022-86a3-4803-aac2-6b035d667a1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:14,888 INFO L407 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:14,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.