./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624c4e7d-83bb-4f79-a412-51e6b988a226/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624c4e7d-83bb-4f79-a412-51e6b988a226/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624c4e7d-83bb-4f79-a412-51e6b988a226/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624c4e7d-83bb-4f79-a412-51e6b988a226/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624c4e7d-83bb-4f79-a412-51e6b988a226/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624c4e7d-83bb-4f79-a412-51e6b988a226/bin/utaipan-verify-DbMuA5NWw2 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 260777f6a7be1f16cc330a008300c11ebdea8f1cf9d8e96a0325274fd8fd5b2a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 11:23:14,827 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:23:14,933 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624c4e7d-83bb-4f79-a412-51e6b988a226/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 11:23:14,938 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:23:14,942 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:23:14,986 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:23:14,987 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:23:14,988 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:23:14,989 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:23:14,991 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:23:14,991 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:23:14,991 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:23:14,992 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:23:14,992 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 11:23:14,994 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:23:14,995 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:23:14,995 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 11:23:14,995 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 11:23:14,996 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:23:14,996 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 11:23:14,996 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 11:23:15,000 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 11:23:15,001 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:23:15,001 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 11:23:15,001 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 11:23:15,001 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 11:23:15,002 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 11:23:15,002 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:23:15,002 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 11:23:15,003 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:23:15,003 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 11:23:15,003 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:23:15,003 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 11:23:15,004 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 11:23:15,006 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:23:15,006 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:23:15,006 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:23:15,006 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:23:15,007 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:23:15,007 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:23:15,007 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:23:15,008 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 11:23:15,008 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 11:23:15,008 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 11:23:15,008 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:23:15,009 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:23:15,009 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:23:15,009 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_624c4e7d-83bb-4f79-a412-51e6b988a226/bin/utaipan-verify-DbMuA5NWw2/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624c4e7d-83bb-4f79-a412-51e6b988a226/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 260777f6a7be1f16cc330a008300c11ebdea8f1cf9d8e96a0325274fd8fd5b2a [2024-11-02 11:23:15,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:23:15,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:23:15,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:23:15,322 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:23:15,323 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:23:15,324 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624c4e7d-83bb-4f79-a412-51e6b988a226/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c Unable to find full path for "g++" [2024-11-02 11:23:17,295 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:23:17,526 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:23:17,527 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624c4e7d-83bb-4f79-a412-51e6b988a226/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c [2024-11-02 11:23:17,535 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624c4e7d-83bb-4f79-a412-51e6b988a226/bin/utaipan-verify-DbMuA5NWw2/data/ad57c801e/4588e8e21f3e49cb9f0291572b01aa3e/FLAGdecad7cb5 [2024-11-02 11:23:17,553 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624c4e7d-83bb-4f79-a412-51e6b988a226/bin/utaipan-verify-DbMuA5NWw2/data/ad57c801e/4588e8e21f3e49cb9f0291572b01aa3e [2024-11-02 11:23:17,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:23:17,557 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:23:17,559 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:23:17,559 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:23:17,565 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:23:17,566 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:23:17" (1/1) ... [2024-11-02 11:23:17,567 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2604d972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:17, skipping insertion in model container [2024-11-02 11:23:17,567 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:23:17" (1/1) ... [2024-11-02 11:23:17,598 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:23:17,790 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624c4e7d-83bb-4f79-a412-51e6b988a226/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c[1124,1137] [2024-11-02 11:23:17,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:23:17,834 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:23:17,847 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624c4e7d-83bb-4f79-a412-51e6b988a226/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c[1124,1137] [2024-11-02 11:23:17,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:23:17,885 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:23:17,886 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:17 WrapperNode [2024-11-02 11:23:17,886 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:23:17,887 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:23:17,887 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:23:17,888 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:23:17,896 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:17" (1/1) ... [2024-11-02 11:23:17,906 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:17" (1/1) ... [2024-11-02 11:23:17,928 INFO L138 Inliner]: procedures = 16, calls = 99, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 106 [2024-11-02 11:23:17,928 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:23:17,929 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:23:17,929 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:23:17,929 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:23:17,940 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:17" (1/1) ... [2024-11-02 11:23:17,940 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:17" (1/1) ... [2024-11-02 11:23:17,943 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:17" (1/1) ... [2024-11-02 11:23:17,943 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:17" (1/1) ... [2024-11-02 11:23:17,950 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:17" (1/1) ... [2024-11-02 11:23:17,952 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:17" (1/1) ... [2024-11-02 11:23:17,954 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:17" (1/1) ... [2024-11-02 11:23:17,955 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:17" (1/1) ... [2024-11-02 11:23:17,958 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:23:17,959 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:23:17,959 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:23:17,959 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:23:17,960 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:17" (1/1) ... [2024-11-02 11:23:17,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:23:17,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624c4e7d-83bb-4f79-a412-51e6b988a226/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:23:17,998 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624c4e7d-83bb-4f79-a412-51e6b988a226/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:23:18,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624c4e7d-83bb-4f79-a412-51e6b988a226/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:23:18,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 11:23:18,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 11:23:18,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 11:23:18,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 11:23:18,036 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_41_0 [2024-11-02 11:23:18,037 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_41_0 [2024-11-02 11:23:18,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:23:18,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:23:18,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 11:23:18,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-02 11:23:18,037 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-02 11:23:18,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 11:23:18,173 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:23:18,180 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:23:18,613 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-02 11:23:18,613 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:23:18,677 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:23:18,682 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-02 11:23:18,683 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:23:18 BoogieIcfgContainer [2024-11-02 11:23:18,683 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:23:18,685 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:23:18,689 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:23:18,694 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:23:18,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:23:17" (1/3) ... [2024-11-02 11:23:18,696 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27430379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:23:18, skipping insertion in model container [2024-11-02 11:23:18,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:17" (2/3) ... [2024-11-02 11:23:18,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27430379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:23:18, skipping insertion in model container [2024-11-02 11:23:18,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:23:18" (3/3) ... [2024-11-02 11:23:18,706 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohencu-ll.c [2024-11-02 11:23:18,749 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:23:18,750 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 11:23:18,869 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:23:18,890 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@708e1cfa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:23:18,891 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 11:23:18,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-02 11:23:18,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-02 11:23:18,907 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:23:18,907 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:23:18,908 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:23:18,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:23:18,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1371458259, now seen corresponding path program 1 times [2024-11-02 11:23:18,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:23:18,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407262295] [2024-11-02 11:23:18,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:23:18,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:23:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:23:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:23:20,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:23:20,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407262295] [2024-11-02 11:23:20,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407262295] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:23:20,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:23:20,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-02 11:23:20,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664597006] [2024-11-02 11:23:20,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:23:20,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 11:23:20,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:23:20,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 11:23:20,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-02 11:23:20,256 INFO L87 Difference]: Start difference. First operand has 38 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:23:20,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:23:20,625 INFO L93 Difference]: Finished difference Result 94 states and 144 transitions. [2024-11-02 11:23:20,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 11:23:20,628 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-02 11:23:20,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:23:20,636 INFO L225 Difference]: With dead ends: 94 [2024-11-02 11:23:20,636 INFO L226 Difference]: Without dead ends: 56 [2024-11-02 11:23:20,640 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-02 11:23:20,644 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 20 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 11:23:20,645 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 192 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 11:23:20,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-02 11:23:20,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-11-02 11:23:20,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.09375) internal successors, (35), 34 states have internal predecessors, (35), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2024-11-02 11:23:20,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2024-11-02 11:23:20,696 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 8 [2024-11-02 11:23:20,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:23:20,697 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2024-11-02 11:23:20,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:23:20,697 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2024-11-02 11:23:20,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-02 11:23:20,698 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:23:20,699 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:23:20,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 11:23:20,699 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:23:20,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:23:20,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1638005840, now seen corresponding path program 1 times [2024-11-02 11:23:20,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:23:20,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088518563] [2024-11-02 11:23:20,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:23:20,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:23:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-02 11:23:20,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732694292] [2024-11-02 11:23:20,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:23:20,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:23:20,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624c4e7d-83bb-4f79-a412-51e6b988a226/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:23:20,779 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624c4e7d-83bb-4f79-a412-51e6b988a226/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:23:20,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624c4e7d-83bb-4f79-a412-51e6b988a226/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 11:23:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:23:20,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-02 11:23:21,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:23:21,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:23:21,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:23:21,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:23:21,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:23:21,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:23:21,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:23:21,761 INFO L349 Elim1Store]: treesize reduction 171, result has 24.0 percent of original size [2024-11-02 11:23:21,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 318 treesize of output 435 [2024-11-02 11:23:21,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:23:21,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:23:21,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:23:21,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:23:21,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:23:21,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:23:21,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:23:21,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:23:21,928 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-02 11:23:21,953 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-02 11:23:21,959 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-02 11:23:22,101 INFO L349 Elim1Store]: treesize reduction 161, result has 10.1 percent of original size [2024-11-02 11:23:22,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 351 treesize of output 382 [2024-11-02 11:23:22,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:23:22,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:23:22,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:23:22,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:23:22,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:23:22,207 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-02 11:23:22,238 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-02 11:23:22,248 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-02 11:23:22,432 INFO L349 Elim1Store]: treesize reduction 161, result has 10.1 percent of original size [2024-11-02 11:23:22,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 289 treesize of output 330 [2024-11-02 11:23:22,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 11:23:22,639 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-11-02 11:23:22,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 89 [2024-11-02 11:23:24,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 89 [2024-11-02 11:23:26,861 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-11-02 11:23:26,870 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-11-02 11:23:28,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 1118 treesize of output 1082