./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh --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 1ae3736aabcb020d122100864e41791456e1f94490735ab1a93eef5c54883fe7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:15:12,980 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:15:13,057 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 17:15:13,063 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:15:13,064 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:15:13,094 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:15:13,095 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:15:13,095 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:15:13,096 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:15:13,097 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:15:13,097 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:15:13,098 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:15:13,099 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:15:13,099 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:15:13,100 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:15:13,100 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:15:13,101 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:15:13,102 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:15:13,102 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:15:13,103 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:15:13,103 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:15:13,104 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:15:13,105 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:15:13,105 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:15:13,106 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:15:13,106 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:15:13,107 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:15:13,107 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:15:13,108 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:15:13,109 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:15:13,109 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:15:13,110 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:15:13,110 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:15:13,111 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:15:13,111 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:15:13,111 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:15:13,112 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:15:13,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:15:13,113 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:15:13,113 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:15:13,113 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:15:13,114 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:15:13,114 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:15:13,114 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:15:13,114 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:15:13,115 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:15:13,115 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:15:13,115 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_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ae3736aabcb020d122100864e41791456e1f94490735ab1a93eef5c54883fe7 [2023-12-02 17:15:13,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:15:13,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:15:13,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:15:13,426 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:15:13,427 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:15:13,428 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c [2023-12-02 17:15:16,672 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:15:16,857 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:15:16,857 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c [2023-12-02 17:15:16,864 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/data/9d8b09e2e/9e55f3e8b59d41f58c61a7a65d317f68/FLAGa36b70a88 [2023-12-02 17:15:16,877 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/data/9d8b09e2e/9e55f3e8b59d41f58c61a7a65d317f68 [2023-12-02 17:15:16,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:15:16,881 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:15:16,883 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:15:16,883 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:15:16,889 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:15:16,890 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:15:16" (1/1) ... [2023-12-02 17:15:16,891 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cfb74f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:15:16, skipping insertion in model container [2023-12-02 17:15:16,891 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:15:16" (1/1) ... [2023-12-02 17:15:16,923 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:15:17,098 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_98454a64-127f-4a7e-89a5-cf35b137dbce/sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c[1613,1626] [2023-12-02 17:15:17,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:15:17,127 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:15:17,146 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_98454a64-127f-4a7e-89a5-cf35b137dbce/sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c[1613,1626] [2023-12-02 17:15:17,153 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:15:17,168 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:15:17,168 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:15:17 WrapperNode [2023-12-02 17:15:17,168 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:15:17,169 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:15:17,169 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:15:17,170 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:15:17,177 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:15:17" (1/1) ... [2023-12-02 17:15:17,184 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:15:17" (1/1) ... [2023-12-02 17:15:17,204 INFO L138 Inliner]: procedures = 14, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 115 [2023-12-02 17:15:17,204 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:15:17,205 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:15:17,205 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:15:17,206 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:15:17,215 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:15:17" (1/1) ... [2023-12-02 17:15:17,215 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:15:17" (1/1) ... [2023-12-02 17:15:17,217 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:15:17" (1/1) ... [2023-12-02 17:15:17,217 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:15:17" (1/1) ... [2023-12-02 17:15:17,220 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:15:17" (1/1) ... [2023-12-02 17:15:17,224 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:15:17" (1/1) ... [2023-12-02 17:15:17,226 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:15:17" (1/1) ... [2023-12-02 17:15:17,227 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:15:17" (1/1) ... [2023-12-02 17:15:17,230 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:15:17,231 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:15:17,231 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:15:17,231 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:15:17,232 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:15:17" (1/1) ... [2023-12-02 17:15:17,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:15:17,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:15:17,271 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:15:17,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:15:17,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:15:17,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:15:17,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:15:17,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:15:17,364 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:15:17,366 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:15:17,552 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:15:17,625 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:15:17,625 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 17:15:17,626 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:15:17 BoogieIcfgContainer [2023-12-02 17:15:17,627 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:15:17,630 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:15:17,630 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:15:17,633 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:15:17,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:15:16" (1/3) ... [2023-12-02 17:15:17,635 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c483fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:15:17, skipping insertion in model container [2023-12-02 17:15:17,635 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:15:17" (2/3) ... [2023-12-02 17:15:17,635 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c483fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:15:17, skipping insertion in model container [2023-12-02 17:15:17,635 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:15:17" (3/3) ... [2023-12-02 17:15:17,637 INFO L112 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+lhb-reducer.c [2023-12-02 17:15:17,658 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:15:17,658 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:15:17,703 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:15:17,709 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;@e97e267, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:15:17,709 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:15:17,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 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) [2023-12-02 17:15:17,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 17:15:17,721 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:15:17,722 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:15:17,736 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:15:17,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:15:17,745 INFO L85 PathProgramCache]: Analyzing trace with hash -548503690, now seen corresponding path program 1 times [2023-12-02 17:15:17,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:15:17,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038278915] [2023-12-02 17:15:17,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:17,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:15:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:15:18,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:15:18,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038278915] [2023-12-02 17:15:18,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038278915] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:15:18,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:15:18,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 17:15:18,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999093196] [2023-12-02 17:15:18,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:15:18,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 17:15:18,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:15:18,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 17:15:18,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-12-02 17:15:18,463 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 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) [2023-12-02 17:15:18,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:15:18,529 INFO L93 Difference]: Finished difference Result 22 states and 33 transitions. [2023-12-02 17:15:18,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 17:15:18,532 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-02 17:15:18,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:15:18,540 INFO L225 Difference]: With dead ends: 22 [2023-12-02 17:15:18,540 INFO L226 Difference]: Without dead ends: 15 [2023-12-02 17:15:18,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-12-02 17:15:18,547 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:15:18,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:15:18,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-12-02 17:15:18,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-12-02 17:15:18,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 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) [2023-12-02 17:15:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2023-12-02 17:15:18,576 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2023-12-02 17:15:18,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:15:18,576 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2023-12-02 17:15:18,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 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) [2023-12-02 17:15:18,577 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2023-12-02 17:15:18,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 17:15:18,578 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:15:18,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:15:18,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:15:18,578 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:15:18,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:15:18,579 INFO L85 PathProgramCache]: Analyzing trace with hash 177920256, now seen corresponding path program 1 times [2023-12-02 17:15:18,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:15:18,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497733546] [2023-12-02 17:15:18,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:18,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:15:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:18,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:15:18,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:15:18,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497733546] [2023-12-02 17:15:18,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497733546] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:15:18,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384226774] [2023-12-02 17:15:18,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:18,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:15:18,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:15:18,925 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:15:18,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:15:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:18,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 17:15:18,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:15:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:15:19,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:15:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:15:19,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384226774] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:15:19,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [188427700] [2023-12-02 17:15:19,619 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 17:15:19,619 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:15:19,622 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:15:19,627 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:15:19,628 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:15:19,887 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:15:20,538 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '171#(and (= ~__return_720~0 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 100 |ULTIMATE.start_main_~main__x~0#1|) (not (= |ULTIMATE.start_main_~main__y~0#1| 100)) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0) (= ~__return_main~0 0))' at error location [2023-12-02 17:15:20,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:15:20,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:15:20,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-12-02 17:15:20,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587623770] [2023-12-02 17:15:20,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:15:20,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 17:15:20,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:15:20,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 17:15:20,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=833, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 17:15:20,543 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 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) [2023-12-02 17:15:20,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:15:20,604 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2023-12-02 17:15:20,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 17:15:20,604 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-02 17:15:20,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:15:20,605 INFO L225 Difference]: With dead ends: 30 [2023-12-02 17:15:20,605 INFO L226 Difference]: Without dead ends: 27 [2023-12-02 17:15:20,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=499, Invalid=833, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 17:15:20,608 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:15:20,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:15:20,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-02 17:15:20,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-12-02 17:15:20,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 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) [2023-12-02 17:15:20,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2023-12-02 17:15:20,613 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2023-12-02 17:15:20,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:15:20,614 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2023-12-02 17:15:20,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 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) [2023-12-02 17:15:20,614 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2023-12-02 17:15:20,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 17:15:20,615 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:15:20,615 INFO L195 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:15:20,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:15:20,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:15:20,816 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:15:20,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:15:20,817 INFO L85 PathProgramCache]: Analyzing trace with hash -941338240, now seen corresponding path program 2 times [2023-12-02 17:15:20,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:15:20,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383499821] [2023-12-02 17:15:20,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:20,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:15:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:15:21,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:15:21,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383499821] [2023-12-02 17:15:21,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383499821] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:15:21,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384669563] [2023-12-02 17:15:21,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:15:21,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:15:21,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:15:21,937 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:15:21,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:15:22,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-02 17:15:22,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:15:22,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 17:15:22,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:15:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:15:22,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:15:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:15:23,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384669563] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:15:23,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1615464891] [2023-12-02 17:15:23,469 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 17:15:23,470 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:15:23,470 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:15:23,470 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:15:23,470 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:15:23,643 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:15:24,288 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '439#(and (= ~__return_720~0 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 100 |ULTIMATE.start_main_~main__x~0#1|) (not (= |ULTIMATE.start_main_~main__y~0#1| 100)) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0) (= ~__return_main~0 0))' at error location [2023-12-02 17:15:24,288 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:15:24,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:15:24,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-12-02 17:15:24,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873886297] [2023-12-02 17:15:24,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:15:24,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-02 17:15:24,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:15:24,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-02 17:15:24,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1591, Invalid=2069, Unknown=0, NotChecked=0, Total=3660 [2023-12-02 17:15:24,295 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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) [2023-12-02 17:15:24,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:15:24,433 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2023-12-02 17:15:24,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 17:15:24,433 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-02 17:15:24,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:15:24,435 INFO L225 Difference]: With dead ends: 54 [2023-12-02 17:15:24,435 INFO L226 Difference]: Without dead ends: 51 [2023-12-02 17:15:24,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1591, Invalid=2069, Unknown=0, NotChecked=0, Total=3660 [2023-12-02 17:15:24,439 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:15:24,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:15:24,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-02 17:15:24,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-12-02 17:15:24,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 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) [2023-12-02 17:15:24,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2023-12-02 17:15:24,448 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2023-12-02 17:15:24,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:15:24,449 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2023-12-02 17:15:24,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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) [2023-12-02 17:15:24,449 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2023-12-02 17:15:24,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-02 17:15:24,452 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:15:24,452 INFO L195 NwaCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:15:24,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 17:15:24,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:15:24,656 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:15:24,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:15:24,657 INFO L85 PathProgramCache]: Analyzing trace with hash -87752064, now seen corresponding path program 3 times [2023-12-02 17:15:24,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:15:24,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118338187] [2023-12-02 17:15:24,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:24,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:15:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:15:27,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:15:27,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118338187] [2023-12-02 17:15:27,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118338187] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:15:27,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009367656] [2023-12-02 17:15:27,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:15:27,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:15:27,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:15:27,872 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:15:27,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 17:15:27,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:15:27,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:15:27,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-02 17:15:27,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:15:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:15:28,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:15:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:15:31,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009367656] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:15:31,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [62912702] [2023-12-02 17:15:31,943 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 17:15:31,943 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:15:31,944 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:15:31,944 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:15:31,944 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:15:32,079 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:15:32,589 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '947#(and (= ~__return_720~0 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 100 |ULTIMATE.start_main_~main__x~0#1|) (not (= |ULTIMATE.start_main_~main__y~0#1| 100)) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0) (= ~__return_main~0 0))' at error location [2023-12-02 17:15:32,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:15:32,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:15:32,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2023-12-02 17:15:32,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961242384] [2023-12-02 17:15:32,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:15:32,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-12-02 17:15:32,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:15:32,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-12-02 17:15:32,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5503, Invalid=6269, Unknown=0, NotChecked=0, Total=11772 [2023-12-02 17:15:32,599 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 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) [2023-12-02 17:15:32,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:15:32,821 INFO L93 Difference]: Finished difference Result 102 states and 149 transitions. [2023-12-02 17:15:32,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-12-02 17:15:32,822 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-12-02 17:15:32,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:15:32,823 INFO L225 Difference]: With dead ends: 102 [2023-12-02 17:15:32,824 INFO L226 Difference]: Without dead ends: 99 [2023-12-02 17:15:32,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5503, Invalid=6269, Unknown=0, NotChecked=0, Total=11772 [2023-12-02 17:15:32,830 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:15:32,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:15:32,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-12-02 17:15:32,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-12-02 17:15:32,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 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) [2023-12-02 17:15:32,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2023-12-02 17:15:32,839 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2023-12-02 17:15:32,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:15:32,839 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2023-12-02 17:15:32,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 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) [2023-12-02 17:15:32,840 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2023-12-02 17:15:32,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-12-02 17:15:32,843 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:15:32,843 INFO L195 NwaCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:15:32,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 17:15:33,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:15:33,044 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:15:33,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:15:33,045 INFO L85 PathProgramCache]: Analyzing trace with hash 155018368, now seen corresponding path program 4 times [2023-12-02 17:15:33,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:15:33,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119544041] [2023-12-02 17:15:33,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:15:33,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:15:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:41,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:15:41,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:15:41,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119544041] [2023-12-02 17:15:41,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119544041] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:15:41,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887521481] [2023-12-02 17:15:41,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:15:41,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:15:41,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:15:41,893 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:15:41,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 17:15:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:15:42,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 96 conjunts are in the unsatisfiable core [2023-12-02 17:15:42,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:15:51,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:15:51,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:16:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:16:02,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887521481] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:16:02,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1373213350] [2023-12-02 17:16:02,177 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 17:16:02,177 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:16:02,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:16:02,177 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:16:02,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:16:02,257 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:16:03,845 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1938#(and (= ~__return_720~0 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 100 |ULTIMATE.start_main_~main__x~0#1|) (not (= |ULTIMATE.start_main_~main__y~0#1| 100)) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0) (= ~__return_main~0 0))' at error location [2023-12-02 17:16:03,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:16:03,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:16:03,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 195 [2023-12-02 17:16:03,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637148315] [2023-12-02 17:16:03,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:16:03,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 196 states [2023-12-02 17:16:03,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:16:03,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2023-12-02 17:16:03,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11277, Invalid=31779, Unknown=0, NotChecked=0, Total=43056 [2023-12-02 17:16:03,862 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 196 states, 196 states have (on average 1.066326530612245) internal successors, (209), 195 states have internal predecessors, (209), 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) [2023-12-02 17:16:05,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:16:05,634 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2023-12-02 17:16:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-12-02 17:16:05,634 INFO L78 Accepts]: Start accepts. Automaton has has 196 states, 196 states have (on average 1.066326530612245) internal successors, (209), 195 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2023-12-02 17:16:05,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:16:05,636 INFO L225 Difference]: With dead ends: 108 [2023-12-02 17:16:05,636 INFO L226 Difference]: Without dead ends: 105 [2023-12-02 17:16:05,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 92 SyntacticMatches, 90 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12355 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=11277, Invalid=31779, Unknown=0, NotChecked=0, Total=43056 [2023-12-02 17:16:05,639 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 4899 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 4899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:16:05,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 4899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4899 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 17:16:05,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-12-02 17:16:05,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-12-02 17:16:05,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 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) [2023-12-02 17:16:05,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2023-12-02 17:16:05,645 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 98 [2023-12-02 17:16:05,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:16:05,645 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2023-12-02 17:16:05,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 196 states, 196 states have (on average 1.066326530612245) internal successors, (209), 195 states have internal predecessors, (209), 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) [2023-12-02 17:16:05,646 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2023-12-02 17:16:05,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-12-02 17:16:05,647 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:16:05,647 INFO L195 NwaCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:16:05,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 17:16:05,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:16:05,847 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:16:05,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:16:05,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1641781440, now seen corresponding path program 5 times [2023-12-02 17:16:05,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:16:05,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519744047] [2023-12-02 17:16:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:16:05,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:16:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:16:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:16:17,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:16:17,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519744047] [2023-12-02 17:16:17,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519744047] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:16:17,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454268945] [2023-12-02 17:16:17,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:16:17,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:16:17,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:16:17,489 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:16:17,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 17:16:17,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2023-12-02 17:16:17,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:16:17,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 111 conjunts are in the unsatisfiable core [2023-12-02 17:16:17,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:16:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:16:22,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:19:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:19:21,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454268945] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:19:21,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [596659535] [2023-12-02 17:19:21,757 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 17:19:21,757 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:19:21,757 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:19:21,758 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:19:21,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:19:21,854 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:19:25,393 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3038#(and (= ~__return_720~0 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 100 |ULTIMATE.start_main_~main__x~0#1|) (not (= |ULTIMATE.start_main_~main__y~0#1| 100)) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0) (= ~__return_main~0 0))' at error location [2023-12-02 17:19:25,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:19:25,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:19:25,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103, 103] total 256 [2023-12-02 17:19:25,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80909936] [2023-12-02 17:19:25,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:19:25,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 257 states [2023-12-02 17:19:25,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:19:25,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 257 interpolants. [2023-12-02 17:19:25,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6683, Invalid=65409, Unknown=0, NotChecked=0, Total=72092 [2023-12-02 17:19:25,402 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 257 states, 257 states have (on average 1.0077821011673151) internal successors, (259), 256 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:19:46,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:19:46,051 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2023-12-02 17:19:46,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-12-02 17:19:46,051 INFO L78 Accepts]: Start accepts. Automaton has has 257 states, 257 states have (on average 1.0077821011673151) internal successors, (259), 256 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2023-12-02 17:19:46,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:19:46,052 INFO L225 Difference]: With dead ends: 107 [2023-12-02 17:19:46,052 INFO L226 Difference]: Without dead ends: 0 [2023-12-02 17:19:46,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14503 ImplicationChecksByTransitivity, 75.3s TimeCoverageRelationStatistics Valid=6690, Invalid=65940, Unknown=0, NotChecked=0, Total=72630 [2023-12-02 17:19:46,057 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12941 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 12942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:19:46,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 12942 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 12941 Invalid, 0 Unknown, 0 Unchecked, 19.9s Time] [2023-12-02 17:19:46,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-02 17:19:46,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-02 17:19:46,058 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) [2023-12-02 17:19:46,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-02 17:19:46,059 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 104 [2023-12-02 17:19:46,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:19:46,059 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-02 17:19:46,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 257 states, 257 states have (on average 1.0077821011673151) internal successors, (259), 256 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:19:46,060 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-02 17:19:46,060 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-02 17:19:46,063 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 17:19:46,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 17:19:46,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:19:46,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-02 17:19:46,271 INFO L899 garLoopResultBuilder]: For program point $Ultimate##38(lines 72 105) no Hoare annotation was computed. [2023-12-02 17:19:46,271 INFO L899 garLoopResultBuilder]: For program point main_returnLabel#1(lines 13 214) no Hoare annotation was computed. [2023-12-02 17:19:46,271 INFO L899 garLoopResultBuilder]: For program point $Ultimate##30(lines 59 129) no Hoare annotation was computed. [2023-12-02 17:19:46,271 INFO L899 garLoopResultBuilder]: For program point $Ultimate##34(lines 65 117) no Hoare annotation was computed. [2023-12-02 17:19:46,271 INFO L899 garLoopResultBuilder]: For program point $Ultimate##6(lines 23 201) no Hoare annotation was computed. [2023-12-02 17:19:46,271 INFO L899 garLoopResultBuilder]: For program point L94(lines 94 103) no Hoare annotation was computed. [2023-12-02 17:19:46,271 INFO L899 garLoopResultBuilder]: For program point $Ultimate##26(lines 53 141) no Hoare annotation was computed. [2023-12-02 17:19:46,271 INFO L899 garLoopResultBuilder]: For program point $Ultimate##22(lines 47 153) no Hoare annotation was computed. [2023-12-02 17:19:46,271 INFO L899 garLoopResultBuilder]: For program point $Ultimate##18(lines 41 165) no Hoare annotation was computed. [2023-12-02 17:19:46,271 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-02 17:19:46,272 INFO L899 garLoopResultBuilder]: For program point $Ultimate##10(lines 29 189) no Hoare annotation was computed. [2023-12-02 17:19:46,272 INFO L899 garLoopResultBuilder]: For program point $Ultimate##14(lines 35 177) no Hoare annotation was computed. [2023-12-02 17:19:46,272 INFO L899 garLoopResultBuilder]: For program point L96(line 96) no Hoare annotation was computed. [2023-12-02 17:19:46,272 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 96) no Hoare annotation was computed. [2023-12-02 17:19:46,272 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-02 17:19:46,272 INFO L899 garLoopResultBuilder]: For program point L17(lines 17 213) no Hoare annotation was computed. [2023-12-02 17:19:46,276 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1] [2023-12-02 17:19:46,279 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 17:19:46,285 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 05:19:46 BoogieIcfgContainer [2023-12-02 17:19:46,285 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 17:19:46,285 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 17:19:46,286 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 17:19:46,286 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 17:19:46,286 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:15:17" (3/4) ... [2023-12-02 17:19:46,289 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-12-02 17:19:46,300 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2023-12-02 17:19:46,300 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-12-02 17:19:46,301 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-12-02 17:19:46,301 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-12-02 17:19:46,395 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 17:19:46,395 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/witness.yml [2023-12-02 17:19:46,396 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 17:19:46,396 INFO L158 Benchmark]: Toolchain (without parser) took 269515.01ms. Allocated memory was 134.2MB in the beginning and 750.8MB in the end (delta: 616.6MB). Free memory was 90.3MB in the beginning and 311.0MB in the end (delta: -220.6MB). Peak memory consumption was 398.7MB. Max. memory is 16.1GB. [2023-12-02 17:19:46,397 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 104.9MB. Free memory is still 57.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 17:19:46,397 INFO L158 Benchmark]: CACSL2BoogieTranslator took 285.61ms. Allocated memory is still 134.2MB. Free memory was 90.3MB in the beginning and 78.5MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 17:19:46,398 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.33ms. Allocated memory is still 134.2MB. Free memory was 78.5MB in the beginning and 76.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 17:19:46,398 INFO L158 Benchmark]: Boogie Preprocessor took 24.49ms. Allocated memory is still 134.2MB. Free memory was 76.9MB in the beginning and 75.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 17:19:46,398 INFO L158 Benchmark]: RCFGBuilder took 396.10ms. Allocated memory is still 134.2MB. Free memory was 75.4MB in the beginning and 58.0MB in the end (delta: 17.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-12-02 17:19:46,399 INFO L158 Benchmark]: TraceAbstraction took 268654.97ms. Allocated memory was 134.2MB in the beginning and 750.8MB in the end (delta: 616.6MB). Free memory was 57.2MB in the beginning and 315.1MB in the end (delta: -258.0MB). Peak memory consumption was 360.9MB. Max. memory is 16.1GB. [2023-12-02 17:19:46,399 INFO L158 Benchmark]: Witness Printer took 110.21ms. Allocated memory is still 750.8MB. Free memory was 315.1MB in the beginning and 311.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 17:19:46,401 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 104.9MB. Free memory is still 57.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 285.61ms. Allocated memory is still 134.2MB. Free memory was 90.3MB in the beginning and 78.5MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.33ms. Allocated memory is still 134.2MB. Free memory was 78.5MB in the beginning and 76.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.49ms. Allocated memory is still 134.2MB. Free memory was 76.9MB in the beginning and 75.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 396.10ms. Allocated memory is still 134.2MB. Free memory was 75.4MB in the beginning and 58.0MB in the end (delta: 17.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 268654.97ms. Allocated memory was 134.2MB in the beginning and 750.8MB in the end (delta: 616.6MB). Free memory was 57.2MB in the beginning and 315.1MB in the end (delta: -258.0MB). Peak memory consumption was 360.9MB. Max. memory is 16.1GB. * Witness Printer took 110.21ms. Allocated memory is still 750.8MB. Free memory was 315.1MB in the beginning and 311.0MB 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: 96]: 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 1 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 268.6s, OverallIterations: 6, TraceHistogramMax: 91, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 23.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2 SdHoareTripleChecker+Valid, 21.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2 mSDsluCounter, 41 SdHoareTripleChecker+Invalid, 19.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 25 mSDsCounter, 87 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18121 IncrementalHoareTripleChecker+Invalid, 18208 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 87 mSolverCounterUnsat, 16 mSDtfsCounter, 18121 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1161 GetRequests, 386 SyntacticMatches, 90 SemanticMatches, 685 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30869 ImplicationChecksByTransitivity, 106.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=5, InterpolantAutomatonStates: 386, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 0 LocationsWithAnnotation, 0 PreInvPairs, 0 NumberOfFragments, 0 HoareAnnotationTreeSize, 0 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 0 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 235.7s InterpolantComputationTime, 597 NumberOfCodeBlocks, 597 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 873 ConstructedInterpolants, 0 QuantifiedInterpolants, 16677 SizeOfPredicates, 8 NumberOfNonLiveVariables, 729 ConjunctsInSsa, 291 ConjunctsInUnsatCore, 16 InterpolantComputations, 1 PerfectInterpolantSequences, 0/25908 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: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-12-02 17:19:46,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98454a64-127f-4a7e-89a5-cf35b137dbce/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE