./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.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_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/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_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/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_db8c27ea-9020-4568-837e-235ea5fae910/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 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:35:31,622 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:35:31,730 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:35:31,736 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:35:31,736 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:35:31,772 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:35:31,776 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:35:31,776 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:35:31,777 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:35:31,777 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:35:31,778 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:35:31,778 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:35:31,779 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:35:31,781 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:35:31,782 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:35:31,782 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:35:31,782 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:35:31,783 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:35:31,783 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:35:31,783 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:35:31,784 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:35:31,784 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:35:31,789 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:35:31,789 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:35:31,789 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:35:31,789 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:35:31,790 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:35:31,790 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:35:31,790 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:35:31,790 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:35:31,791 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:35:31,791 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:35:31,791 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:35:31,791 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:35:31,791 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:35:31,792 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:35:31,792 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:35:31,792 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:35:31,794 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:35:31,794 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:35:31,794 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:35:31,795 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:35:31,795 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:35:31,796 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:35:31,796 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:35:31,796 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:35:31,796 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:35:31,797 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_db8c27ea-9020-4568-837e-235ea5fae910/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 [2024-11-02 12:35:32,084 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:35:32,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:35:32,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:35:32,120 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:35:32,121 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:35:32,122 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c Unable to find full path for "g++" [2024-11-02 12:35:34,313 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:35:34,525 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:35:34,525 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2024-11-02 12:35:34,534 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/data/2dda939a6/74d7af3a7cb14f8dbaafef5bdf273111/FLAG8effaff8f [2024-11-02 12:35:34,550 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/data/2dda939a6/74d7af3a7cb14f8dbaafef5bdf273111 [2024-11-02 12:35:34,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:35:34,554 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:35:34,555 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:35:34,556 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:35:34,561 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:35:34,562 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:35:34" (1/1) ... [2024-11-02 12:35:34,563 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b632112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:34, skipping insertion in model container [2024-11-02 12:35:34,563 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:35:34" (1/1) ... [2024-11-02 12:35:34,585 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:35:34,824 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_db8c27ea-9020-4568-837e-235ea5fae910/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2024-11-02 12:35:34,847 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:35:34,856 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:35:34,868 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_db8c27ea-9020-4568-837e-235ea5fae910/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2024-11-02 12:35:34,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:35:34,896 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:35:34,897 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:34 WrapperNode [2024-11-02 12:35:34,897 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:35:34,898 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:35:34,901 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:35:34,901 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:35:34,909 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:34" (1/1) ... [2024-11-02 12:35:34,916 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:34" (1/1) ... [2024-11-02 12:35:34,938 INFO L138 Inliner]: procedures = 15, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 78 [2024-11-02 12:35:34,939 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:35:34,939 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:35:34,939 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:35:34,940 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:35:34,949 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:34" (1/1) ... [2024-11-02 12:35:34,949 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:34" (1/1) ... [2024-11-02 12:35:34,951 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:34" (1/1) ... [2024-11-02 12:35:34,951 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:34" (1/1) ... [2024-11-02 12:35:34,959 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:34" (1/1) ... [2024-11-02 12:35:34,966 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:34" (1/1) ... [2024-11-02 12:35:34,968 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:34" (1/1) ... [2024-11-02 12:35:34,968 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:34" (1/1) ... [2024-11-02 12:35:34,974 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:35:34,975 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:35:34,975 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:35:34,976 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:35:34,976 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:34" (1/1) ... [2024-11-02 12:35:34,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:35:35,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:35:35,017 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:35:35,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:35:35,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:35:35,051 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-02 12:35:35,051 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-02 12:35:35,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:35:35,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:35:35,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:35:35,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:35:35,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:35:35,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:35:35,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:35:35,145 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:35:35,147 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:35:35,374 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-02 12:35:35,378 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:35:35,461 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:35:35,462 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-02 12:35:35,462 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:35:35 BoogieIcfgContainer [2024-11-02 12:35:35,462 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:35:35,465 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:35:35,468 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:35:35,472 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:35:35,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:35:34" (1/3) ... [2024-11-02 12:35:35,474 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@414a408b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:35:35, skipping insertion in model container [2024-11-02 12:35:35,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:34" (2/3) ... [2024-11-02 12:35:35,476 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@414a408b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:35:35, skipping insertion in model container [2024-11-02 12:35:35,476 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:35:35" (3/3) ... [2024-11-02 12:35:35,479 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr2.c [2024-11-02 12:35:35,499 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:35:35,500 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:35:35,587 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:35:35,597 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;@4c4b97a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:35:35,598 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:35:35,603 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:35:35,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-02 12:35:35,612 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:35,612 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-02 12:35:35,613 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:35:35,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:35,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1119026146, now seen corresponding path program 1 times [2024-11-02 12:35:35,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:35,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449198554] [2024-11-02 12:35:35,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:35,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:35:35,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:35,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449198554] [2024-11-02 12:35:35,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449198554] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:35:35,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:35:35,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:35:35,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357704724] [2024-11-02 12:35:35,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:35:35,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:35:35,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:35,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:35:35,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:35:35,976 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:36,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:36,058 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2024-11-02 12:35:36,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:35:36,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2024-11-02 12:35:36,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:36,066 INFO L225 Difference]: With dead ends: 27 [2024-11-02 12:35:36,066 INFO L226 Difference]: Without dead ends: 19 [2024-11-02 12:35:36,068 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:35:36,072 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:36,073 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 16 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:35:36,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-02 12:35:36,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2024-11-02 12:35:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:35:36,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2024-11-02 12:35:36,114 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 6 [2024-11-02 12:35:36,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:36,115 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2024-11-02 12:35:36,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:36,115 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2024-11-02 12:35:36,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-02 12:35:36,121 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:36,121 INFO L215 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:36,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:35:36,122 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:35:36,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:36,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1522735512, now seen corresponding path program 1 times [2024-11-02 12:35:36,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:36,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217523403] [2024-11-02 12:35:36,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:36,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:36,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 12:35:36,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:36,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217523403] [2024-11-02 12:35:36,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217523403] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:35:36,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:35:36,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:35:36,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576902757] [2024-11-02 12:35:36,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:35:36,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:35:36,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:36,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:35:36,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:35:36,346 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 12:35:36,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:36,432 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2024-11-02 12:35:36,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:35:36,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2024-11-02 12:35:36,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:36,435 INFO L225 Difference]: With dead ends: 25 [2024-11-02 12:35:36,435 INFO L226 Difference]: Without dead ends: 20 [2024-11-02 12:35:36,436 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:35:36,437 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:36,437 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 9 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:35:36,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-02 12:35:36,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2024-11-02 12:35:36,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:35:36,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2024-11-02 12:35:36,449 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 17 [2024-11-02 12:35:36,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:36,449 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2024-11-02 12:35:36,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 12:35:36,449 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2024-11-02 12:35:36,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-02 12:35:36,452 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:36,452 INFO L215 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:36,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:35:36,453 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:35:36,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:36,458 INFO L85 PathProgramCache]: Analyzing trace with hash -47647524, now seen corresponding path program 1 times [2024-11-02 12:35:36,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:36,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038057636] [2024-11-02 12:35:36,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:36,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 12:35:36,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:36,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038057636] [2024-11-02 12:35:36,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038057636] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:35:36,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599645798] [2024-11-02 12:35:36,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:36,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:36,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:35:36,625 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:35:36,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:35:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:36,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 12:35:36,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:35:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 12:35:36,867 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:35:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 12:35:36,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599645798] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:35:36,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1391891803] [2024-11-02 12:35:36,985 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-02 12:35:36,985 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:35:36,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:35:36,995 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:35:36,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:35:40,466 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-02 12:35:40,468 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:35:41,839 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '268#(and (<= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| 4)) 0) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 ~N~0))' at error location [2024-11-02 12:35:41,839 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:35:41,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:35:41,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-02 12:35:41,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121246747] [2024-11-02 12:35:41,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:35:41,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 12:35:41,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:41,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 12:35:41,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-11-02 12:35:41,843 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-02 12:35:42,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:42,042 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2024-11-02 12:35:42,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:35:42,043 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 18 [2024-11-02 12:35:42,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:42,045 INFO L225 Difference]: With dead ends: 52 [2024-11-02 12:35:42,045 INFO L226 Difference]: Without dead ends: 45 [2024-11-02 12:35:42,046 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2024-11-02 12:35:42,047 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 57 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:42,047 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 18 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:35:42,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-02 12:35:42,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2024-11-02 12:35:42,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-02 12:35:42,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 47 transitions. [2024-11-02 12:35:42,067 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 47 transitions. Word has length 18 [2024-11-02 12:35:42,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:42,067 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 47 transitions. [2024-11-02 12:35:42,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-02 12:35:42,068 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 47 transitions. [2024-11-02 12:35:42,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-02 12:35:42,071 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:42,071 INFO L215 NwaCegarLoop]: trace histogram [12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:42,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:35:42,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:42,277 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:35:42,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:42,282 INFO L85 PathProgramCache]: Analyzing trace with hash 452743582, now seen corresponding path program 2 times [2024-11-02 12:35:42,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:42,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120288571] [2024-11-02 12:35:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:42,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2024-11-02 12:35:42,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:42,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120288571] [2024-11-02 12:35:42,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120288571] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:35:42,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79922935] [2024-11-02 12:35:42,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:35:42,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:42,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:35:42,615 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:35:42,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:35:42,738 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-02 12:35:42,739 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:35:42,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-02 12:35:42,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:35:42,948 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2024-11-02 12:35:42,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:35:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2024-11-02 12:35:43,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79922935] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:35:43,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1057824221] [2024-11-02 12:35:43,159 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-02 12:35:43,164 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:35:43,164 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:35:43,164 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:35:43,165 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:35:45,439 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-02 12:35:45,440 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:35:46,751 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '761#(and (<= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| 4)) 0) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 ~N~0))' at error location [2024-11-02 12:35:46,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:35:46,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:35:46,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 19 [2024-11-02 12:35:46,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439574432] [2024-11-02 12:35:46,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:35:46,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-02 12:35:46,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:46,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-02 12:35:46,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2024-11-02 12:35:46,757 INFO L87 Difference]: Start difference. First operand 34 states and 47 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2024-11-02 12:35:47,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:47,210 INFO L93 Difference]: Finished difference Result 121 states and 165 transitions. [2024-11-02 12:35:47,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-02 12:35:47,212 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 54 [2024-11-02 12:35:47,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:47,213 INFO L225 Difference]: With dead ends: 121 [2024-11-02 12:35:47,214 INFO L226 Difference]: Without dead ends: 111 [2024-11-02 12:35:47,214 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2024-11-02 12:35:47,215 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 187 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:47,216 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 39 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:35:47,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-02 12:35:47,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 70. [2024-11-02 12:35:47,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-02 12:35:47,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 101 transitions. [2024-11-02 12:35:47,234 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 101 transitions. Word has length 54 [2024-11-02 12:35:47,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:47,235 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 101 transitions. [2024-11-02 12:35:47,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2024-11-02 12:35:47,235 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 101 transitions. [2024-11-02 12:35:47,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-02 12:35:47,239 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:47,239 INFO L215 NwaCegarLoop]: trace histogram [30, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:47,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:35:47,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:47,440 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:35:47,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:47,440 INFO L85 PathProgramCache]: Analyzing trace with hash 758889950, now seen corresponding path program 3 times [2024-11-02 12:35:47,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:47,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157540970] [2024-11-02 12:35:47,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:47,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2024-11-02 12:35:48,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:48,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157540970] [2024-11-02 12:35:48,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157540970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:35:48,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560491018] [2024-11-02 12:35:48,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:35:48,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:48,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:35:48,143 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:35:48,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:35:49,772 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:35:49,772 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:35:49,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-02 12:35:49,781 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:35:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2024-11-02 12:35:50,269 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:35:50,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2024-11-02 12:35:50,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560491018] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:35:50,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [45487203] [2024-11-02 12:35:50,773 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-02 12:35:50,773 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:35:50,774 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:35:50,774 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:35:50,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:35:52,621 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-02 12:35:52,623 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:35:53,928 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1883#(and (<= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| 4)) 0) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 ~N~0))' at error location [2024-11-02 12:35:53,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:35:53,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:35:53,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2024-11-02 12:35:53,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992973800] [2024-11-02 12:35:53,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:35:53,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-02 12:35:53,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:53,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-02 12:35:53,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2024-11-02 12:35:53,933 INFO L87 Difference]: Start difference. First operand 70 states and 101 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) [2024-11-02 12:35:55,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:55,098 INFO L93 Difference]: Finished difference Result 259 states and 351 transitions. [2024-11-02 12:35:55,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-02 12:35:55,099 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) Word has length 126 [2024-11-02 12:35:55,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:55,101 INFO L225 Difference]: With dead ends: 259 [2024-11-02 12:35:55,101 INFO L226 Difference]: Without dead ends: 243 [2024-11-02 12:35:55,105 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=904, Invalid=2402, Unknown=0, NotChecked=0, Total=3306 [2024-11-02 12:35:55,106 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 449 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:55,106 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 87 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-02 12:35:55,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-11-02 12:35:55,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 142. [2024-11-02 12:35:55,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2024-11-02 12:35:55,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 209 transitions. [2024-11-02 12:35:55,153 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 209 transitions. Word has length 126 [2024-11-02 12:35:55,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:55,157 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 209 transitions. [2024-11-02 12:35:55,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) [2024-11-02 12:35:55,158 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 209 transitions. [2024-11-02 12:35:55,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2024-11-02 12:35:55,166 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:55,166 INFO L215 NwaCegarLoop]: trace histogram [66, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:55,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 12:35:55,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:55,372 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:35:55,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:55,373 INFO L85 PathProgramCache]: Analyzing trace with hash 157304414, now seen corresponding path program 4 times [2024-11-02 12:35:55,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:55,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344658913] [2024-11-02 12:35:55,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:55,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2024-11-02 12:35:57,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:57,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344658913] [2024-11-02 12:35:57,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344658913] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:35:57,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315012202] [2024-11-02 12:35:57,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-02 12:35:57,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:57,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:35:57,529 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:35:57,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db8c27ea-9020-4568-837e-235ea5fae910/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:35:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:57,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-02 12:35:57,842 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:35:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2024-11-02 12:35:59,000 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:36:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2024-11-02 12:36:00,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315012202] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:36:00,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1687046153] [2024-11-02 12:36:00,484 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-02 12:36:00,484 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:36:00,484 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:36:00,484 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:36:00,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs