./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5 --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 6597d5a31aa324ba443314d2c363b302cd71d697c12811ade53ae3225a095206 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:34:13,781 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:34:13,858 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 19:34:13,865 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:34:13,865 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:34:13,893 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:34:13,894 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:34:13,895 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:34:13,896 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:34:13,897 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:34:13,898 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:34:13,898 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:34:13,899 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:34:13,900 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:34:13,901 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:34:13,901 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:34:13,902 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:34:13,903 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:34:13,903 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:34:13,904 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:34:13,905 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:34:13,906 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:34:13,907 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:34:13,907 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:34:13,908 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:34:13,909 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:34:13,909 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:34:13,910 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:34:13,911 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:34:13,911 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:34:13,912 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:34:13,912 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:34:13,913 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:34:13,913 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:34:13,914 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:34:13,914 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:34:13,914 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:34:13,915 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:34:13,915 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:34:13,916 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:34:13,916 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:34:13,916 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:34:13,917 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:34:13,917 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:34:13,918 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:34:13,918 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:34:13,918 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:34:13,919 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_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6597d5a31aa324ba443314d2c363b302cd71d697c12811ade53ae3225a095206 [2023-11-21 19:34:14,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:34:14,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:34:14,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:34:14,263 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:34:14,264 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:34:14,265 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c [2023-11-21 19:34:17,499 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:34:17,715 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:34:17,716 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c [2023-11-21 19:34:17,725 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/data/32356ab52/714cacfe26764092b4406c9466a4235a/FLAG679746049 [2023-11-21 19:34:17,740 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/data/32356ab52/714cacfe26764092b4406c9466a4235a [2023-11-21 19:34:17,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:34:17,745 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:34:17,747 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:34:17,747 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:34:17,755 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:34:17,756 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:34:17" (1/1) ... [2023-11-21 19:34:17,757 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@424d154c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:17, skipping insertion in model container [2023-11-21 19:34:17,757 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:34:17" (1/1) ... [2023-11-21 19:34:17,786 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:34:17,961 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c[946,959] [2023-11-21 19:34:17,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:34:17,977 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:34:17,996 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c[946,959] [2023-11-21 19:34:17,997 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:34:18,016 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:34:18,017 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:18 WrapperNode [2023-11-21 19:34:18,017 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:34:18,019 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:34:18,019 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:34:18,019 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:34:18,026 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:18" (1/1) ... [2023-11-21 19:34:18,033 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:18" (1/1) ... [2023-11-21 19:34:18,047 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2023-11-21 19:34:18,047 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:34:18,048 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:34:18,048 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:34:18,048 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:34:18,056 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:18" (1/1) ... [2023-11-21 19:34:18,056 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:18" (1/1) ... [2023-11-21 19:34:18,058 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:18" (1/1) ... [2023-11-21 19:34:18,059 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:18" (1/1) ... [2023-11-21 19:34:18,062 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:18" (1/1) ... [2023-11-21 19:34:18,064 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:18" (1/1) ... [2023-11-21 19:34:18,065 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:18" (1/1) ... [2023-11-21 19:34:18,066 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:18" (1/1) ... [2023-11-21 19:34:18,068 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:34:18,070 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:34:18,070 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:34:18,070 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:34:18,071 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:18" (1/1) ... [2023-11-21 19:34:18,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:34:18,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:34:18,114 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:34:18,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:34:18,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:34:18,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:34:18,153 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2023-11-21 19:34:18,154 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2023-11-21 19:34:18,154 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2023-11-21 19:34:18,154 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2023-11-21 19:34:18,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:34:18,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:34:18,227 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:34:18,229 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:34:18,355 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:34:18,379 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:34:18,380 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 19:34:18,382 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:34:18 BoogieIcfgContainer [2023-11-21 19:34:18,382 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:34:18,386 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:34:18,386 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:34:18,390 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:34:18,390 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:34:17" (1/3) ... [2023-11-21 19:34:18,391 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2abd45ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:34:18, skipping insertion in model container [2023-11-21 19:34:18,391 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:34:18" (2/3) ... [2023-11-21 19:34:18,392 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2abd45ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:34:18, skipping insertion in model container [2023-11-21 19:34:18,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:34:18" (3/3) ... [2023-11-21 19:34:18,394 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2023-11-21 19:34:18,416 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:34:18,416 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:34:18,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:34:18,479 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7a6d6af5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:34:18,480 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:34:18,485 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) [2023-11-21 19:34:18,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-21 19:34:18,494 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:18,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:34:18,495 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:34:18,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:18,502 INFO L85 PathProgramCache]: Analyzing trace with hash -389521846, now seen corresponding path program 1 times [2023-11-21 19:34:18,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:34:18,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712263639] [2023-11-21 19:34:18,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:18,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:34:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:18,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:34:18,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:34:18,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712263639] [2023-11-21 19:34:18,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712263639] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:18,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:34:18,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:34:18,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373520612] [2023-11-21 19:34:18,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:18,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:34:18,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:34:18,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:34:18,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:34:18,860 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) [2023-11-21 19:34:18,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:18,960 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2023-11-21 19:34:18,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 19:34:18,969 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 [2023-11-21 19:34:18,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:18,977 INFO L225 Difference]: With dead ends: 34 [2023-11-21 19:34:18,977 INFO L226 Difference]: Without dead ends: 26 [2023-11-21 19:34:18,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:34:18,988 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:18,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 73 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:34:19,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-21 19:34:19,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-21 19:34:19,042 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) [2023-11-21 19:34:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-11-21 19:34:19,047 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2023-11-21 19:34:19,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:19,048 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-11-21 19:34:19,049 INFO L496 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) [2023-11-21 19:34:19,049 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-11-21 19:34:19,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-21 19:34:19,052 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:19,053 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:34:19,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:34:19,053 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:34:19,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:19,055 INFO L85 PathProgramCache]: Analyzing trace with hash 741502751, now seen corresponding path program 1 times [2023-11-21 19:34:19,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:34:19,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477657610] [2023-11-21 19:34:19,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:19,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:34:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:34:19,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:34:19,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477657610] [2023-11-21 19:34:19,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477657610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:34:19,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199160488] [2023-11-21 19:34:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:19,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:19,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:34:19,378 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:34:19,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:34:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:19,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 19:34:19,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:19,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:34:19,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:34:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:34:19,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199160488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:34:19,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1586298006] [2023-11-21 19:34:19,957 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-11-21 19:34:19,958 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:34:19,964 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:34:19,970 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:34:19,972 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:34:20,127 INFO L197 IcfgInterpreter]: Interpreting procedure fibo1 with input of size 34 for LOIs [2023-11-21 19:34:20,227 INFO L197 IcfgInterpreter]: Interpreting procedure fibo2 with input of size 34 for LOIs [2023-11-21 19:34:20,243 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:34:20,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1586298006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:20,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:34:20,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7, 7] total 18 [2023-11-21 19:34:20,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576067286] [2023-11-21 19:34:20,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:20,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 19:34:20,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:34:20,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 19:34:20,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-11-21 19:34:20,571 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) [2023-11-21 19:34:20,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:20,743 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2023-11-21 19:34:20,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:34:20,744 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 [2023-11-21 19:34:20,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:20,747 INFO L225 Difference]: With dead ends: 64 [2023-11-21 19:34:20,748 INFO L226 Difference]: Without dead ends: 40 [2023-11-21 19:34:20,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-11-21 19:34:20,752 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:20,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 103 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:34:20,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-21 19:34:20,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2023-11-21 19:34:20,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-21 19:34:20,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2023-11-21 19:34:20,778 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2023-11-21 19:34:20,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:20,778 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2023-11-21 19:34:20,780 INFO L496 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) [2023-11-21 19:34:20,780 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2023-11-21 19:34:20,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-21 19:34:20,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:34:20,783 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:34:20,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 19:34:20,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:20,999 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:34:20,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:34:21,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1785876995, now seen corresponding path program 1 times [2023-11-21 19:34:21,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:34:21,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682359160] [2023-11-21 19:34:21,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:21,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:34:21,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 19:34:21,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:34:21,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682359160] [2023-11-21 19:34:21,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682359160] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:34:21,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590279271] [2023-11-21 19:34:21,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:34:21,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:21,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:34:21,176 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:34:21,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:34:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:34:21,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-21 19:34:21,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:34:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 19:34:21,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:34:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 19:34:21,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590279271] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:34:21,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1746588044] [2023-11-21 19:34:21,328 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-21 19:34:21,328 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:34:21,329 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:34:21,329 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:34:21,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:34:21,544 INFO L197 IcfgInterpreter]: Interpreting procedure fibo1 with input of size 34 for LOIs [2023-11-21 19:34:21,750 INFO L197 IcfgInterpreter]: Interpreting procedure fibo2 with input of size 41 for LOIs [2023-11-21 19:34:21,898 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:34:22,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1746588044] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:34:22,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:34:22,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [9, 9, 9] total 22 [2023-11-21 19:34:22,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45873884] [2023-11-21 19:34:22,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:34:22,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 19:34:22,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:34:22,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 19:34:22,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2023-11-21 19:34:22,780 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 9 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 19:34:23,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:34:23,112 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2023-11-21 19:34:23,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 19:34:23,112 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 9 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2023-11-21 19:34:23,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:34:23,113 INFO L225 Difference]: With dead ends: 50 [2023-11-21 19:34:23,113 INFO L226 Difference]: Without dead ends: 0 [2023-11-21 19:34:23,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2023-11-21 19:34:23,116 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:34:23,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 21 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:34:23,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-21 19:34:23,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-21 19:34:23,119 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) [2023-11-21 19:34:23,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-21 19:34:23,119 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2023-11-21 19:34:23,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:34:23,119 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-21 19:34:23,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 9 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 19:34:23,120 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-21 19:34:23,120 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-21 19:34:23,123 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-21 19:34:23,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 19:34:23,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:34:23,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-21 19:34:23,768 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-21 19:34:23,769 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2023-11-21 19:34:23,769 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-21 19:34:23,769 INFO L899 garLoopResultBuilder]: For program point L41(line 41) no Hoare annotation was computed. [2023-11-21 19:34:23,769 INFO L899 garLoopResultBuilder]: For program point L40(lines 40 42) no Hoare annotation was computed. [2023-11-21 19:34:23,770 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (= 18 (select |#length| 2)) (= 2 |ULTIMATE.start_main_~x~0#1|) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= (select .cse0 0) 48) (= (select .cse0 1) 0))) [2023-11-21 19:34:23,770 INFO L899 garLoopResultBuilder]: For program point L39-1(line 39) no Hoare annotation was computed. [2023-11-21 19:34:23,770 INFO L899 garLoopResultBuilder]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2023-11-21 19:34:23,770 INFO L895 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (let ((.cse1 (< |#StackHeapBarrier| 1))) (and (or (not (= |fibo2_#in~n| 1)) .cse1) (or .cse1 (not (= |fibo2_#in~n| 0))))) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= 18 (select |#length| 2))) (not (= (select |#valid| 2) 1)))) [2023-11-21 19:34:23,771 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2023-11-21 19:34:23,771 INFO L895 garLoopResultBuilder]: At program point L25-2(line 25) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (let ((.cse1 (< |#StackHeapBarrier| 1))) (and (or (not (= |fibo2_#in~n| 1)) .cse1) (or .cse1 (not (= |fibo2_#in~n| 0))))) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= 18 (select |#length| 2))) (not (= (select |#valid| 2) 1)))) [2023-11-21 19:34:23,771 INFO L899 garLoopResultBuilder]: For program point L22(lines 22 26) no Hoare annotation was computed. [2023-11-21 19:34:23,771 INFO L899 garLoopResultBuilder]: For program point L25-3(line 25) no Hoare annotation was computed. [2023-11-21 19:34:23,771 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 26) no Hoare annotation was computed. [2023-11-21 19:34:23,771 INFO L899 garLoopResultBuilder]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2023-11-21 19:34:23,772 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 19 27) the Hoare annotation is: true [2023-11-21 19:34:23,772 INFO L899 garLoopResultBuilder]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2023-11-21 19:34:23,772 INFO L895 garLoopResultBuilder]: At program point L15(line 15) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= 2 |fibo1_#in~n|)) (not (= (select .cse0 0) 48)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= 18 (select |#length| 2))) (= fibo1_~n 2) (< |#StackHeapBarrier| 1) (not (= (select |#valid| 2) 1)))) [2023-11-21 19:34:23,772 INFO L899 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2023-11-21 19:34:23,773 INFO L895 garLoopResultBuilder]: At program point L15-2(line 15) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= 2 |fibo1_#in~n|)) (not (= (select .cse0 0) 48)) (and (= |fibo1_#t~ret4| 1) (= fibo1_~n 2)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= 18 (select |#length| 2))) (< |#StackHeapBarrier| 1) (not (= (select |#valid| 2) 1)))) [2023-11-21 19:34:23,773 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 16) no Hoare annotation was computed. [2023-11-21 19:34:23,773 INFO L899 garLoopResultBuilder]: For program point L15-3(line 15) no Hoare annotation was computed. [2023-11-21 19:34:23,773 INFO L899 garLoopResultBuilder]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2023-11-21 19:34:23,773 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 16) no Hoare annotation was computed. [2023-11-21 19:34:23,773 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 9 17) the Hoare annotation is: true [2023-11-21 19:34:23,773 INFO L899 garLoopResultBuilder]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2023-11-21 19:34:23,784 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-21 19:34:23,787 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-21 19:34:23,798 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 07:34:23 BoogieIcfgContainer [2023-11-21 19:34:23,799 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-21 19:34:23,799 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-21 19:34:23,799 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-21 19:34:23,800 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-21 19:34:23,800 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:34:18" (3/4) ... [2023-11-21 19:34:23,802 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-21 19:34:23,807 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2023-11-21 19:34:23,807 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2023-11-21 19:34:23,817 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2023-11-21 19:34:23,818 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-11-21 19:34:23,818 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-21 19:34:23,818 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-21 19:34:23,914 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/witness.graphml [2023-11-21 19:34:23,914 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/witness.yml [2023-11-21 19:34:23,915 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-21 19:34:23,915 INFO L158 Benchmark]: Toolchain (without parser) took 6170.57ms. Allocated memory was 178.3MB in the beginning and 213.9MB in the end (delta: 35.7MB). Free memory was 132.8MB in the beginning and 114.5MB in the end (delta: 18.3MB). Peak memory consumption was 56.0MB. Max. memory is 16.1GB. [2023-11-21 19:34:23,916 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 138.4MB. Free memory is still 78.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 19:34:23,916 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.00ms. Allocated memory is still 178.3MB. Free memory was 132.3MB in the beginning and 121.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-21 19:34:23,917 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.82ms. Allocated memory is still 178.3MB. Free memory was 121.8MB in the beginning and 120.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 19:34:23,917 INFO L158 Benchmark]: Boogie Preprocessor took 20.48ms. Allocated memory is still 178.3MB. Free memory was 120.8MB in the beginning and 119.7MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 19:34:23,918 INFO L158 Benchmark]: RCFGBuilder took 312.82ms. Allocated memory is still 178.3MB. Free memory was 119.7MB in the beginning and 108.7MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-21 19:34:23,919 INFO L158 Benchmark]: TraceAbstraction took 5413.18ms. Allocated memory was 178.3MB in the beginning and 213.9MB in the end (delta: 35.7MB). Free memory was 108.1MB in the beginning and 118.7MB in the end (delta: -10.6MB). Peak memory consumption was 26.7MB. Max. memory is 16.1GB. [2023-11-21 19:34:23,919 INFO L158 Benchmark]: Witness Printer took 115.48ms. Allocated memory is still 213.9MB. Free memory was 118.7MB in the beginning and 114.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-21 19:34:23,922 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 138.4MB. Free memory is still 78.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 271.00ms. Allocated memory is still 178.3MB. Free memory was 132.3MB in the beginning and 121.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.82ms. Allocated memory is still 178.3MB. Free memory was 121.8MB in the beginning and 120.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 20.48ms. Allocated memory is still 178.3MB. Free memory was 120.8MB in the beginning and 119.7MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 312.82ms. Allocated memory is still 178.3MB. Free memory was 119.7MB in the beginning and 108.7MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 5413.18ms. Allocated memory was 178.3MB in the beginning and 213.9MB in the end (delta: 35.7MB). Free memory was 108.1MB in the beginning and 118.7MB in the end (delta: -10.6MB). Peak memory consumption was 26.7MB. Max. memory is 16.1GB. * Witness Printer took 115.48ms. Allocated memory is still 213.9MB. Free memory was 118.7MB in the beginning and 114.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 41]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.3s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 37 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 31 mSDsluCounter, 197 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 148 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 263 IncrementalHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 49 mSDtfsCounter, 263 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 156 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=2, InterpolantAutomatonStates: 27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 34 PreInvPairs, 35 NumberOfFragments, 352 HoareAnnotationTreeSize, 34 FomulaSimplifications, 29 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 680 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 137 ConstructedInterpolants, 0 QuantifiedInterpolants, 340 SizeOfPredicates, 2 NumberOfNonLiveVariables, 142 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 9/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.9s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 6, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 39, DAG_INTERPRETER_EARLY_EXITS: 7, TOOLS_POST_APPLICATIONS: 38, TOOLS_POST_TIME: 0.3s, TOOLS_POST_CALL_APPLICATIONS: 21, TOOLS_POST_CALL_TIME: 0.2s, TOOLS_POST_RETURN_APPLICATIONS: 16, TOOLS_POST_RETURN_TIME: 0.2s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 74, TOOLS_QUANTIFIERELIM_TIME: 0.6s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 98, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 13, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 39, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 16, CALL_SUMMARIZER_CACHE_MISSES: 4, CALL_SUMMARIZER_OVERALL_TIME: 0.2s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.2s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 299, DAG_COMPRESSION_RETAINED_NODES: 109, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-21 19:34:23,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18cace73-221e-4f6d-9c57-ee2b5c43d959/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE