./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje --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 6060f0df556deb332d160eff8a39bcf699b67887fb6a475da5cd3837f5257af8 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 06:03:09,341 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:03:09,434 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 06:03:09,443 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:03:09,444 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:03:09,479 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:03:09,480 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:03:09,480 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:03:09,481 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:03:09,483 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:03:09,484 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:03:09,484 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:03:09,485 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:03:09,485 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:03:09,485 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:03:09,486 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:03:09,490 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:03:09,490 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:03:09,491 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:03:09,491 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:03:09,492 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:03:09,492 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:03:09,493 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:03:09,493 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 06:03:09,493 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:03:09,494 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:03:09,494 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:03:09,494 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:03:09,495 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 06:03:09,497 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:03:09,498 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 06:03:09,498 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:03:09,499 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:03:09,499 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 06:03:09,500 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:03:09,500 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:03:09,501 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:03:09,501 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:03:09,501 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:03:09,502 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:03:09,502 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:03:09,503 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 06:03:09,504 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:03:09,504 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:03:09,504 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:03:09,504 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:03:09,505 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:03:09,505 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_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6060f0df556deb332d160eff8a39bcf699b67887fb6a475da5cd3837f5257af8 [2024-11-09 06:03:09,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:03:09,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:03:09,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:03:09,812 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:03:09,813 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:03:09,814 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c Unable to find full path for "g++" [2024-11-09 06:03:11,689 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:03:11,933 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:03:11,934 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2024-11-09 06:03:11,942 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/data/164df3688/40d039663188476484eaaf194f7d6478/FLAG912cbd27a [2024-11-09 06:03:12,316 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/data/164df3688/40d039663188476484eaaf194f7d6478 [2024-11-09 06:03:12,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:03:12,321 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:03:12,323 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:03:12,323 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:03:12,329 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:03:12,330 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:03:12" (1/1) ... [2024-11-09 06:03:12,331 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2415ef65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:12, skipping insertion in model container [2024-11-09 06:03:12,331 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:03:12" (1/1) ... [2024-11-09 06:03:12,359 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:03:12,554 WARN L250 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_3a3b058c-f890-43db-8c38-daa579953d3b/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2024-11-09 06:03:12,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:03:12,578 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:03:12,602 WARN L250 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_3a3b058c-f890-43db-8c38-daa579953d3b/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2024-11-09 06:03:12,605 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:03:12,626 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:03:12,626 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:12 WrapperNode [2024-11-09 06:03:12,627 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:03:12,628 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:03:12,628 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:03:12,628 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:03:12,636 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:12" (1/1) ... [2024-11-09 06:03:12,644 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:12" (1/1) ... [2024-11-09 06:03:12,663 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 72 [2024-11-09 06:03:12,665 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:03:12,666 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:03:12,666 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:03:12,666 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:03:12,676 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:12" (1/1) ... [2024-11-09 06:03:12,677 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:12" (1/1) ... [2024-11-09 06:03:12,679 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:12" (1/1) ... [2024-11-09 06:03:12,681 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:12" (1/1) ... [2024-11-09 06:03:12,689 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:12" (1/1) ... [2024-11-09 06:03:12,696 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:12" (1/1) ... [2024-11-09 06:03:12,697 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:12" (1/1) ... [2024-11-09 06:03:12,700 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:12" (1/1) ... [2024-11-09 06:03:12,703 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:03:12,707 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:03:12,707 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:03:12,707 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:03:12,708 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:12" (1/1) ... [2024-11-09 06:03:12,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:03:12,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:03:12,749 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:03:12,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:03:12,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 06:03:12,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 06:03:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 06:03:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 06:03:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:03:12,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:03:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 06:03:12,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 06:03:12,873 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:03:12,875 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:03:13,047 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-09 06:03:13,048 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:03:13,075 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:03:13,075 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 06:03:13,076 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:03:13 BoogieIcfgContainer [2024-11-09 06:03:13,076 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:03:13,079 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:03:13,079 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:03:13,083 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:03:13,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:03:12" (1/3) ... [2024-11-09 06:03:13,084 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72753b54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:03:13, skipping insertion in model container [2024-11-09 06:03:13,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:12" (2/3) ... [2024-11-09 06:03:13,085 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72753b54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:03:13, skipping insertion in model container [2024-11-09 06:03:13,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:03:13" (3/3) ... [2024-11-09 06:03:13,086 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel.i.v+cfa-reducer.c [2024-11-09 06:03:13,102 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:03:13,103 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 06:03:13,168 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:03:13,175 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;@19b8a28d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:03:13,176 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 06:03:13,187 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 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) [2024-11-09 06:03:13,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 06:03:13,192 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:13,193 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:13,193 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:03:13,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:13,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1537138869, now seen corresponding path program 1 times [2024-11-09 06:03:13,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:03:13,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082691232] [2024-11-09 06:03:13,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:13,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:03:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:03:13,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:03:13,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082691232] [2024-11-09 06:03:13,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082691232] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:03:13,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:03:13,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:03:13,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235402835] [2024-11-09 06:03:13,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:03:13,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:03:13,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:03:13,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:03:13,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:03:13,464 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2024-11-09 06:03:13,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:03:13,534 INFO L93 Difference]: Finished difference Result 25 states and 35 transitions. [2024-11-09 06:03:13,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:03:13,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2024-11-09 06:03:13,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:03:13,547 INFO L225 Difference]: With dead ends: 25 [2024-11-09 06:03:13,548 INFO L226 Difference]: Without dead ends: 13 [2024-11-09 06:03:13,551 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 [2024-11-09 06:03:13,555 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:03:13,556 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 23 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:03:13,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-09 06:03:13,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-11-09 06:03:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:03:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2024-11-09 06:03:13,608 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2024-11-09 06:03:13,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:03:13,609 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2024-11-09 06:03:13,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2024-11-09 06:03:13,609 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2024-11-09 06:03:13,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 06:03:13,622 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:13,623 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:13,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:03:13,623 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:03:13,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:13,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1566842374, now seen corresponding path program 1 times [2024-11-09 06:03:13,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:03:13,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328537925] [2024-11-09 06:03:13,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:13,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:03:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:13,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:03:13,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:03:13,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328537925] [2024-11-09 06:03:13,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328537925] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:03:13,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978505347] [2024-11-09 06:03:13,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:13,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:13,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:03:13,781 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:03:13,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:03:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:13,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 06:03:13,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:03:13,923 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:03:13,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:03:13,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978505347] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:03:13,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [458010910] [2024-11-09 06:03:13,990 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:03:13,990 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:03:13,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:03:14,007 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:03:14,008 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:03:14,826 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:03:15,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [458010910] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:03:15,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:03:15,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [3, 3, 3] total 13 [2024-11-09 06:03:15,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248911530] [2024-11-09 06:03:15,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:03:15,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 06:03:15,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:03:15,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 06:03:15,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-09 06:03:15,202 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 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) [2024-11-09 06:03:15,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:03:15,298 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2024-11-09 06:03:15,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 06:03:15,298 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 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 11 [2024-11-09 06:03:15,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:03:15,299 INFO L225 Difference]: With dead ends: 18 [2024-11-09 06:03:15,299 INFO L226 Difference]: Without dead ends: 15 [2024-11-09 06:03:15,300 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-09 06:03:15,301 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:03:15,302 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 11 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:03:15,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-09 06:03:15,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-09 06:03:15,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) [2024-11-09 06:03:15,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-11-09 06:03:15,307 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2024-11-09 06:03:15,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:03:15,307 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-11-09 06:03:15,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 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) [2024-11-09 06:03:15,308 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-11-09 06:03:15,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 06:03:15,308 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:15,309 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:15,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 06:03:15,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:15,513 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:03:15,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:15,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1795911261, now seen corresponding path program 1 times [2024-11-09 06:03:15,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:03:15,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344828206] [2024-11-09 06:03:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:15,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:03:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:03:15,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:03:15,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344828206] [2024-11-09 06:03:15,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344828206] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:03:15,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319092020] [2024-11-09 06:03:15,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:15,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:15,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:03:15,656 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:03:15,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 06:03:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:15,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 06:03:15,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:03:15,742 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:03:15,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:03:15,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319092020] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:03:15,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [565337937] [2024-11-09 06:03:15,771 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:03:15,773 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:03:15,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:03:15,774 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:03:15,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:03:16,375 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:03:16,815 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '253#(exists ((|v_ULTIMATE.start_main_~main__i~0#1_19| Int) (|v_ULTIMATE.start_main_~main__pos~0#1_15| Int) (|v_ULTIMATE.start_main_#t~mem8#1_19| Int)) (and (<= 1 |#StackHeapBarrier|) (<= (+ |v_ULTIMATE.start_main_~main__pos~0#1_15| 1) |v_ULTIMATE.start_main_~main__i~0#1_19|) (<= |v_ULTIMATE.start_main_#t~mem8#1_19| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_#t~mem8#1_19| 2147483648)) (<= |v_ULTIMATE.start_main_~main__pos~0#1_15| 99999) (<= 0 |v_ULTIMATE.start_main_~main__pos~0#1_15|) (<= 2 |ULTIMATE.start_main_~#main__a~0#1.base|) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0)))' at error location [2024-11-09 06:03:16,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:03:16,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:03:16,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-09 06:03:16,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084467628] [2024-11-09 06:03:16,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:03:16,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 06:03:16,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:03:16,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 06:03:16,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-09 06:03:16,818 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2024-11-09 06:03:16,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:03:16,851 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2024-11-09 06:03:16,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:03:16,852 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 06:03:16,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:03:16,853 INFO L225 Difference]: With dead ends: 30 [2024-11-09 06:03:16,853 INFO L226 Difference]: Without dead ends: 20 [2024-11-09 06:03:16,854 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-09 06:03:16,855 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:03:16,855 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 30 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:03:16,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-09 06:03:16,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-09 06:03:16,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 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) [2024-11-09 06:03:16,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2024-11-09 06:03:16,861 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2024-11-09 06:03:16,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:03:16,861 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2024-11-09 06:03:16,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2024-11-09 06:03:16,862 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2024-11-09 06:03:16,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 06:03:16,862 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:16,862 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:16,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 06:03:17,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:17,066 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:03:17,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:17,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1345295636, now seen corresponding path program 2 times [2024-11-09 06:03:17,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:03:17,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382218944] [2024-11-09 06:03:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:17,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:03:17,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:03:17,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:03:17,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382218944] [2024-11-09 06:03:17,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382218944] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:03:17,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139721213] [2024-11-09 06:03:17,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:03:17,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:17,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:03:17,291 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:03:17,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 06:03:17,357 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 06:03:17,358 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:03:17,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 06:03:17,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:17,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 11 [2024-11-09 06:03:17,438 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:03:17,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2024-11-09 06:03:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 06:03:17,518 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:03:17,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 06:03:17,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2024-11-09 06:03:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 06:03:17,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139721213] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:03:17,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [868108191] [2024-11-09 06:03:17,647 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:03:17,648 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:03:17,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:03:17,648 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:03:17,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:03:18,166 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:03:18,732 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '443#(exists ((|v_ULTIMATE.start_main_~main__pos~0#1_17| Int) (|v_ULTIMATE.start_main_~main__i~0#1_28| Int) (|v_ULTIMATE.start_main_#t~mem8#1_27| Int)) (and (<= 1 |#StackHeapBarrier|) (<= (+ |v_ULTIMATE.start_main_~main__pos~0#1_17| 1) |v_ULTIMATE.start_main_~main__i~0#1_28|) (<= |v_ULTIMATE.start_main_~main__pos~0#1_17| 99999) (<= 0 (+ |v_ULTIMATE.start_main_#t~mem8#1_27| 2147483648)) (<= |v_ULTIMATE.start_main_#t~mem8#1_27| 2147483647) (<= 0 |v_ULTIMATE.start_main_~main__pos~0#1_17|) (<= 2 |ULTIMATE.start_main_~#main__a~0#1.base|) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0)))' at error location [2024-11-09 06:03:18,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:03:18,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:03:18,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2024-11-09 06:03:18,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776879866] [2024-11-09 06:03:18,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:03:18,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 06:03:18,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:03:18,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 06:03:18,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-11-09 06:03:18,736 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 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) [2024-11-09 06:03:18,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:03:18,920 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2024-11-09 06:03:18,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 06:03:18,921 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 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 19 [2024-11-09 06:03:18,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:03:18,923 INFO L225 Difference]: With dead ends: 38 [2024-11-09 06:03:18,923 INFO L226 Difference]: Without dead ends: 27 [2024-11-09 06:03:18,924 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2024-11-09 06:03:18,924 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:03:18,925 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 28 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:03:18,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-09 06:03:18,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2024-11-09 06:03:18,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:03:18,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2024-11-09 06:03:18,940 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2024-11-09 06:03:18,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:03:18,940 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2024-11-09 06:03:18,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 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) [2024-11-09 06:03:18,941 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2024-11-09 06:03:18,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 06:03:18,943 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:18,943 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:18,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 06:03:19,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:19,144 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:03:19,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:19,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1902701961, now seen corresponding path program 3 times [2024-11-09 06:03:19,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:03:19,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569579225] [2024-11-09 06:03:19,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:19,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:03:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:03:19,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:03:19,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569579225] [2024-11-09 06:03:19,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569579225] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:03:19,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816360580] [2024-11-09 06:03:19,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:03:19,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:19,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:03:19,289 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:03:19,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 06:03:19,359 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:03:19,359 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:03:19,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 06:03:19,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:03:19,391 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:03:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:03:19,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816360580] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:03:19,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [590101817] [2024-11-09 06:03:19,484 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:03:19,485 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:03:19,485 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:03:19,485 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:03:19,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:03:19,813 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:03:20,345 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '693#(exists ((|v_ULTIMATE.start_main_~main__i~0#1_37| Int) (|v_ULTIMATE.start_main_#t~mem8#1_36| Int) (|v_ULTIMATE.start_main_~main__pos~0#1_18| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~main__pos~0#1_18|) (<= (+ |v_ULTIMATE.start_main_~main__pos~0#1_18| 1) |v_ULTIMATE.start_main_~main__i~0#1_37|) (<= |v_ULTIMATE.start_main_#t~mem8#1_36| 2147483647) (<= |v_ULTIMATE.start_main_~main__pos~0#1_18| 99999) (<= 0 (+ |v_ULTIMATE.start_main_#t~mem8#1_36| 2147483648)) (<= 2 |ULTIMATE.start_main_~#main__a~0#1.base|) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0)))' at error location [2024-11-09 06:03:20,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:03:20,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:03:20,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-09 06:03:20,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531240912] [2024-11-09 06:03:20,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:03:20,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 06:03:20,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:03:20,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 06:03:20,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2024-11-09 06:03:20,349 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 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) [2024-11-09 06:03:20,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:03:20,412 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2024-11-09 06:03:20,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 06:03:20,413 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 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 25 [2024-11-09 06:03:20,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:03:20,414 INFO L225 Difference]: With dead ends: 54 [2024-11-09 06:03:20,414 INFO L226 Difference]: Without dead ends: 40 [2024-11-09 06:03:20,415 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2024-11-09 06:03:20,417 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:03:20,419 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 37 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:03:20,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-09 06:03:20,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-09 06:03:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 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) [2024-11-09 06:03:20,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2024-11-09 06:03:20,432 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 25 [2024-11-09 06:03:20,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:03:20,432 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2024-11-09 06:03:20,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 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) [2024-11-09 06:03:20,433 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2024-11-09 06:03:20,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 06:03:20,434 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:20,434 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:20,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 06:03:20,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:20,639 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:03:20,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:20,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1158111002, now seen corresponding path program 4 times [2024-11-09 06:03:20,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:03:20,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567256435] [2024-11-09 06:03:20,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:20,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:03:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:03:21,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:03:21,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567256435] [2024-11-09 06:03:21,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567256435] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:03:21,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944976136] [2024-11-09 06:03:21,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:03:21,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:21,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:03:21,019 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:03:21,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 06:03:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:21,117 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 06:03:21,119 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:03:21,180 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:03:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:03:21,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944976136] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:03:21,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2108650216] [2024-11-09 06:03:21,536 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:03:21,536 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:03:21,536 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:03:21,537 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:03:21,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:03:21,865 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:03:22,457 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1077#(exists ((|v_ULTIMATE.start_main_#t~mem8#1_45| Int) (|v_ULTIMATE.start_main_~main__pos~0#1_19| Int) (|v_ULTIMATE.start_main_~main__i~0#1_46| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~main__pos~0#1_19| 99999) (<= (+ |v_ULTIMATE.start_main_~main__pos~0#1_19| 1) |v_ULTIMATE.start_main_~main__i~0#1_46|) (<= |v_ULTIMATE.start_main_#t~mem8#1_45| 2147483647) (<= 0 |v_ULTIMATE.start_main_~main__pos~0#1_19|) (<= 2 |ULTIMATE.start_main_~#main__a~0#1.base|) (= ~__return_60~0 0) (<= 0 (+ |v_ULTIMATE.start_main_#t~mem8#1_45| 2147483648)) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0)))' at error location [2024-11-09 06:03:22,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:03:22,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:03:22,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2024-11-09 06:03:22,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661999834] [2024-11-09 06:03:22,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:03:22,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 06:03:22,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:03:22,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 06:03:22,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=827, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 06:03:22,460 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 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) [2024-11-09 06:03:22,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:03:22,590 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2024-11-09 06:03:22,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 06:03:22,595 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 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 39 [2024-11-09 06:03:22,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:03:22,596 INFO L225 Difference]: With dead ends: 82 [2024-11-09 06:03:22,596 INFO L226 Difference]: Without dead ends: 68 [2024-11-09 06:03:22,597 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 91 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=433, Invalid=827, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 06:03:22,598 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:03:22,599 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 30 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:03:22,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-09 06:03:22,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-11-09 06:03:22,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 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) [2024-11-09 06:03:22,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2024-11-09 06:03:22,616 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 39 [2024-11-09 06:03:22,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:03:22,617 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2024-11-09 06:03:22,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 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) [2024-11-09 06:03:22,617 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2024-11-09 06:03:22,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-09 06:03:22,619 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:22,619 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:22,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 06:03:22,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:22,823 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:03:22,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:22,826 INFO L85 PathProgramCache]: Analyzing trace with hash 98311328, now seen corresponding path program 5 times [2024-11-09 06:03:22,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:03:22,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569017645] [2024-11-09 06:03:22,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:22,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:03:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:23,797 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:03:23,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:03:23,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569017645] [2024-11-09 06:03:23,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569017645] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:03:23,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188622148] [2024-11-09 06:03:23,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:03:23,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:23,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:03:23,799 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:03:23,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 06:03:23,899 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 06:03:23,899 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:03:23,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 06:03:23,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:23,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 11 [2024-11-09 06:03:24,191 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-11-09 06:03:24,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 31 [2024-11-09 06:03:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2024-11-09 06:03:24,364 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:03:24,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2024-11-09 06:03:24,739 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:03:24,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 34 [2024-11-09 06:03:24,766 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2024-11-09 06:03:24,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188622148] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:03:24,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1266293898] [2024-11-09 06:03:24,769 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:03:24,769 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:03:24,769 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:03:24,770 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:03:24,770 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:03:25,089 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:03:26,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1730#(exists ((|v_ULTIMATE.start_main_~main__pos~0#1_21| Int) (|v_ULTIMATE.start_main_~main__i~0#1_59| Int) (|v_ULTIMATE.start_main_#t~mem8#1_57| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~main__pos~0#1_21| 99999) (<= |v_ULTIMATE.start_main_#t~mem8#1_57| 2147483647) (<= 0 |v_ULTIMATE.start_main_~main__pos~0#1_21|) (<= (+ |v_ULTIMATE.start_main_~main__pos~0#1_21| 1) |v_ULTIMATE.start_main_~main__i~0#1_59|) (<= 2 |ULTIMATE.start_main_~#main__a~0#1.base|) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (<= 0 (+ |v_ULTIMATE.start_main_#t~mem8#1_57| 2147483648))))' at error location [2024-11-09 06:03:26,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:03:26,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:03:26,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 11, 11] total 46 [2024-11-09 06:03:26,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56951370] [2024-11-09 06:03:26,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:03:26,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-09 06:03:26,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:03:26,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-09 06:03:26,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=2249, Unknown=0, NotChecked=0, Total=2756 [2024-11-09 06:03:26,077 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 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) [2024-11-09 06:03:26,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:03:26,825 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2024-11-09 06:03:26,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-09 06:03:26,825 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 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 67 [2024-11-09 06:03:26,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:03:26,826 INFO L225 Difference]: With dead ends: 94 [2024-11-09 06:03:26,826 INFO L226 Difference]: Without dead ends: 79 [2024-11-09 06:03:26,828 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 171 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=611, Invalid=3049, Unknown=0, NotChecked=0, Total=3660 [2024-11-09 06:03:26,829 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:03:26,829 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 60 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:03:26,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-09 06:03:26,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2024-11-09 06:03:26,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 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) [2024-11-09 06:03:26,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2024-11-09 06:03:26,842 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 67 [2024-11-09 06:03:26,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:03:26,843 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2024-11-09 06:03:26,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 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) [2024-11-09 06:03:26,843 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2024-11-09 06:03:26,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-09 06:03:26,845 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:26,845 INFO L215 NwaCegarLoop]: trace histogram [27, 27, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:26,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 06:03:27,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:27,046 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:03:27,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:27,047 INFO L85 PathProgramCache]: Analyzing trace with hash 952817585, now seen corresponding path program 6 times [2024-11-09 06:03:27,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:03:27,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194268753] [2024-11-09 06:03:27,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:27,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:03:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 06:03:27,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:03:27,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194268753] [2024-11-09 06:03:27,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194268753] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:03:27,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55508043] [2024-11-09 06:03:27,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:03:27,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:27,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:03:27,923 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:03:27,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 06:03:28,068 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:03:28,069 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:03:28,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 06:03:28,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 06:03:28,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:03:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 06:03:29,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55508043] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:03:29,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1600891084] [2024-11-09 06:03:29,378 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:03:29,378 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:03:29,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:03:29,379 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:03:29,379 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:03:29,690 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:03:30,585 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2496#(exists ((|v_ULTIMATE.start_main_~main__pos~0#1_22| Int) (|v_ULTIMATE.start_main_~main__i~0#1_72| Int) (|v_ULTIMATE.start_main_#t~mem8#1_70| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_#t~mem8#1_70| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_#t~mem8#1_70| 2147483648)) (<= (+ |v_ULTIMATE.start_main_~main__pos~0#1_22| 1) |v_ULTIMATE.start_main_~main__i~0#1_72|) (<= |v_ULTIMATE.start_main_~main__pos~0#1_22| 99999) (<= 0 |v_ULTIMATE.start_main_~main__pos~0#1_22|) (<= 2 |ULTIMATE.start_main_~#main__a~0#1.base|) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0)))' at error location [2024-11-09 06:03:30,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:03:30,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:03:30,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 58 [2024-11-09 06:03:30,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563309368] [2024-11-09 06:03:30,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:03:30,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-09 06:03:30,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:03:30,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-09 06:03:30,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1738, Invalid=2552, Unknown=0, NotChecked=0, Total=4290 [2024-11-09 06:03:30,590 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 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) [2024-11-09 06:03:30,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:03:30,841 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2024-11-09 06:03:30,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-09 06:03:30,842 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 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 77 [2024-11-09 06:03:30,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:03:30,843 INFO L225 Difference]: With dead ends: 158 [2024-11-09 06:03:30,843 INFO L226 Difference]: Without dead ends: 136 [2024-11-09 06:03:30,845 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 186 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1738, Invalid=2552, Unknown=0, NotChecked=0, Total=4290 [2024-11-09 06:03:30,845 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:03:30,846 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 37 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:03:30,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-09 06:03:30,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2024-11-09 06:03:30,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 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) [2024-11-09 06:03:30,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2024-11-09 06:03:30,868 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 77 [2024-11-09 06:03:30,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:03:30,868 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2024-11-09 06:03:30,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 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) [2024-11-09 06:03:30,869 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2024-11-09 06:03:30,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-09 06:03:30,871 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:30,871 INFO L215 NwaCegarLoop]: trace histogram [56, 56, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:30,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 06:03:31,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:31,074 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:03:31,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:31,075 INFO L85 PathProgramCache]: Analyzing trace with hash 78946434, now seen corresponding path program 7 times [2024-11-09 06:03:31,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:03:31,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500644426] [2024-11-09 06:03:31,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:31,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:03:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 06:03:34,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:03:34,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500644426] [2024-11-09 06:03:34,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500644426] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:03:34,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763135343] [2024-11-09 06:03:34,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:03:34,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:34,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:03:34,149 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:03:34,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 06:03:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:34,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-09 06:03:34,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 06:03:34,547 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:03:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 06:03:38,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763135343] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:03:38,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [18357849] [2024-11-09 06:03:38,849 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:03:38,849 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:03:38,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:03:38,850 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:03:38,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:03:39,076 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:03:40,062 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3832#(and (exists ((|v_ULTIMATE.start_main_~main__i~0#1_85| Int) (|v_ULTIMATE.start_main_#t~mem8#1_83| Int) (|v_ULTIMATE.start_main_~main__pos~0#1_23| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_#t~mem8#1_83| 2147483647) (<= 0 |v_ULTIMATE.start_main_~main__pos~0#1_23|) (<= (+ |v_ULTIMATE.start_main_~main__pos~0#1_23| 1) |v_ULTIMATE.start_main_~main__i~0#1_85|) (<= |v_ULTIMATE.start_main_~main__pos~0#1_23| 99999) (<= 0 (+ |v_ULTIMATE.start_main_#t~mem8#1_83| 2147483648)) (<= 2 |ULTIMATE.start_main_~#main__a~0#1.base|))) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0))' at error location [2024-11-09 06:03:40,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:03:40,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:03:40,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 116 [2024-11-09 06:03:40,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412969071] [2024-11-09 06:03:40,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:03:40,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2024-11-09 06:03:40,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:03:40,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2024-11-09 06:03:40,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6813, Invalid=8439, Unknown=0, NotChecked=0, Total=15252 [2024-11-09 06:03:40,070 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 117 states, 117 states have (on average 2.0427350427350426) internal successors, (239), 116 states have internal predecessors, (239), 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) [2024-11-09 06:03:40,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:03:40,600 INFO L93 Difference]: Finished difference Result 274 states and 333 transitions. [2024-11-09 06:03:40,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-11-09 06:03:40,601 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0427350427350426) internal successors, (239), 116 states have internal predecessors, (239), 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 135 [2024-11-09 06:03:40,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:03:40,603 INFO L225 Difference]: With dead ends: 274 [2024-11-09 06:03:40,603 INFO L226 Difference]: Without dead ends: 252 [2024-11-09 06:03:40,606 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 331 SyntacticMatches, 8 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2814 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=6813, Invalid=8439, Unknown=0, NotChecked=0, Total=15252 [2024-11-09 06:03:40,607 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:03:40,607 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 58 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:03:40,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-11-09 06:03:40,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2024-11-09 06:03:40,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.0079681274900398) internal successors, (253), 251 states have internal predecessors, (253), 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) [2024-11-09 06:03:40,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2024-11-09 06:03:40,643 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 135 [2024-11-09 06:03:40,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:03:40,643 INFO L471 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2024-11-09 06:03:40,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0427350427350426) internal successors, (239), 116 states have internal predecessors, (239), 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) [2024-11-09 06:03:40,644 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2024-11-09 06:03:40,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2024-11-09 06:03:40,648 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:03:40,648 INFO L215 NwaCegarLoop]: trace histogram [114, 114, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:03:40,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 06:03:40,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:40,849 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:03:40,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:03:40,849 INFO L85 PathProgramCache]: Analyzing trace with hash -741983132, now seen corresponding path program 8 times [2024-11-09 06:03:40,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:03:40,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122930753] [2024-11-09 06:03:40,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:03:40,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:03:40,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:03:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 13052 backedges. 0 proven. 12996 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 06:03:51,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:03:51,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122930753] [2024-11-09 06:03:51,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122930753] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:03:51,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728996354] [2024-11-09 06:03:51,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:03:51,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:03:51,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:03:51,314 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:03:51,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 06:03:51,627 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-09 06:03:51,627 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:03:51,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-09 06:03:51,635 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:03:51,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 11 [2024-11-09 06:03:54,330 INFO L349 Elim1Store]: treesize reduction 24, result has 86.4 percent of original size [2024-11-09 06:03:54,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 183 [2024-11-09 06:03:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13052 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 12996 trivial. 0 not checked. [2024-11-09 06:03:55,258 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:04:02,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 103 [2024-11-09 06:04:03,020 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:04:03,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 110 treesize of output 198 [2024-11-09 06:04:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13052 backedges. 0 proven. 54 refuted. 2 times theorem prover too weak. 12996 trivial. 0 not checked. [2024-11-09 06:04:03,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728996354] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:04:03,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1865345600] [2024-11-09 06:04:03,275 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:04:03,275 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:04:03,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:04:03,276 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:04:03,276 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:04:03,543 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:04:06,408 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6244#(exists ((|v_ULTIMATE.start_main_#t~mem8#1_103| Int) (|v_ULTIMATE.start_main_~main__i~0#1_106| Int) (|v_ULTIMATE.start_main_~main__pos~0#1_25| Int)) (and (<= 1 |#StackHeapBarrier|) (<= (+ |v_ULTIMATE.start_main_~main__pos~0#1_25| 1) |v_ULTIMATE.start_main_~main__i~0#1_106|) (<= |v_ULTIMATE.start_main_#t~mem8#1_103| 2147483647) (<= 0 |v_ULTIMATE.start_main_~main__pos~0#1_25|) (<= 0 (+ |v_ULTIMATE.start_main_#t~mem8#1_103| 2147483648)) (<= |v_ULTIMATE.start_main_~main__pos~0#1_25| 99999) (<= 2 |ULTIMATE.start_main_~#main__a~0#1.base|) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0)))' at error location [2024-11-09 06:04:06,408 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:04:06,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:04:06,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 19, 19] total 149 [2024-11-09 06:04:06,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505307658] [2024-11-09 06:04:06,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:04:06,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2024-11-09 06:04:06,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:06,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2024-11-09 06:04:06,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7072, Invalid=17106, Unknown=2, NotChecked=0, Total=24180 [2024-11-09 06:04:06,415 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand has 149 states, 149 states have (on average 1.8724832214765101) internal successors, (279), 149 states have internal predecessors, (279), 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) [2024-11-09 06:04:17,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:17,042 INFO L93 Difference]: Finished difference Result 294 states and 304 transitions. [2024-11-09 06:04:17,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2024-11-09 06:04:17,043 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 1.8724832214765101) internal successors, (279), 149 states have internal predecessors, (279), 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 251 [2024-11-09 06:04:17,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:17,045 INFO L225 Difference]: With dead ends: 294 [2024-11-09 06:04:17,045 INFO L226 Difference]: Without dead ends: 271 [2024-11-09 06:04:17,048 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 883 GetRequests, 703 SyntacticMatches, 10 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7031 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=7476, Invalid=21932, Unknown=4, NotChecked=0, Total=29412 [2024-11-09 06:04:17,049 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:17,049 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 72 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:04:17,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2024-11-09 06:04:17,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 270. [2024-11-09 06:04:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.0074349442379182) internal successors, (271), 269 states have internal predecessors, (271), 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) [2024-11-09 06:04:17,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 271 transitions. [2024-11-09 06:04:17,080 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 271 transitions. Word has length 251 [2024-11-09 06:04:17,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:17,081 INFO L471 AbstractCegarLoop]: Abstraction has 270 states and 271 transitions. [2024-11-09 06:04:17,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 1.8724832214765101) internal successors, (279), 149 states have internal predecessors, (279), 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) [2024-11-09 06:04:17,082 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 271 transitions. [2024-11-09 06:04:17,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2024-11-09 06:04:17,085 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:17,086 INFO L215 NwaCegarLoop]: trace histogram [115, 115, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:17,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 06:04:17,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 06:04:17,286 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:04:17,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:17,287 INFO L85 PathProgramCache]: Analyzing trace with hash 330484353, now seen corresponding path program 9 times [2024-11-09 06:04:17,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:17,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12676808] [2024-11-09 06:04:17,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:17,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 13465 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-09 06:04:27,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:27,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12676808] [2024-11-09 06:04:27,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12676808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:04:27,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515451427] [2024-11-09 06:04:27,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:04:27,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:27,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:04:27,702 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:04:27,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 06:04:28,130 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:04:28,130 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:04:28,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-11-09 06:04:28,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:04:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 13465 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-09 06:04:28,596 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:04:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13465 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-09 06:04:47,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515451427] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:04:47,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1412412010] [2024-11-09 06:04:47,429 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:04:47,429 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:04:47,429 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:04:47,429 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:04:47,430 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:04:47,638 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:04:50,958 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8922#(exists ((|v_ULTIMATE.start_main_#t~mem8#1_124| Int) (|v_ULTIMATE.start_main_~main__i~0#1_127| Int) (|v_ULTIMATE.start_main_~main__pos~0#1_26| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~main__pos~0#1_26|) (<= |v_ULTIMATE.start_main_#t~mem8#1_124| 2147483647) (<= |v_ULTIMATE.start_main_~main__pos~0#1_26| 99999) (<= (+ |v_ULTIMATE.start_main_~main__pos~0#1_26| 1) |v_ULTIMATE.start_main_~main__i~0#1_127|) (<= 0 (+ |v_ULTIMATE.start_main_#t~mem8#1_124| 2147483648)) (<= 2 |ULTIMATE.start_main_~#main__a~0#1.base|) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0)))' at error location [2024-11-09 06:04:50,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:04:50,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:04:50,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117, 117] total 234 [2024-11-09 06:04:50,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453190490] [2024-11-09 06:04:50,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:04:50,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 235 states [2024-11-09 06:04:50,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:50,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 235 interpolants. [2024-11-09 06:04:50,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27522, Invalid=30800, Unknown=0, NotChecked=0, Total=58322 [2024-11-09 06:04:50,974 INFO L87 Difference]: Start difference. First operand 270 states and 271 transitions. Second operand has 235 states, 235 states have (on average 2.021276595744681) internal successors, (475), 234 states have internal predecessors, (475), 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) [2024-11-09 06:04:53,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:53,072 INFO L93 Difference]: Finished difference Result 542 states and 660 transitions. [2024-11-09 06:04:53,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2024-11-09 06:04:53,073 INFO L78 Accepts]: Start accepts. Automaton has has 235 states, 235 states have (on average 2.021276595744681) internal successors, (475), 234 states have internal predecessors, (475), 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 269 [2024-11-09 06:04:53,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:53,075 INFO L225 Difference]: With dead ends: 542 [2024-11-09 06:04:53,075 INFO L226 Difference]: Without dead ends: 504 [2024-11-09 06:04:53,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 666 SyntacticMatches, 16 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8505 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=27522, Invalid=30800, Unknown=0, NotChecked=0, Total=58322 [2024-11-09 06:04:53,079 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:53,080 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 51 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:04:53,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2024-11-09 06:04:53,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 504. [2024-11-09 06:04:53,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 1.0039761431411531) internal successors, (505), 503 states have internal predecessors, (505), 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) [2024-11-09 06:04:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 505 transitions. [2024-11-09 06:04:53,133 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 505 transitions. Word has length 269 [2024-11-09 06:04:53,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:53,134 INFO L471 AbstractCegarLoop]: Abstraction has 504 states and 505 transitions. [2024-11-09 06:04:53,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 235 states, 235 states have (on average 2.021276595744681) internal successors, (475), 234 states have internal predecessors, (475), 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) [2024-11-09 06:04:53,135 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 505 transitions. [2024-11-09 06:04:53,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2024-11-09 06:04:53,145 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:53,145 INFO L215 NwaCegarLoop]: trace histogram [232, 232, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:53,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 06:04:53,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:53,346 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:04:53,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:53,346 INFO L85 PathProgramCache]: Analyzing trace with hash 787486730, now seen corresponding path program 10 times [2024-11-09 06:04:53,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:53,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106189390] [2024-11-09 06:04:53,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:53,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 54064 backedges. 0 proven. 53824 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-09 06:05:33,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:33,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106189390] [2024-11-09 06:05:33,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106189390] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:05:33,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429326559] [2024-11-09 06:05:33,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:05:33,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:33,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:05:33,720 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:05:33,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 06:05:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:34,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 2459 conjuncts, 234 conjuncts are in the unsatisfiable core [2024-11-09 06:05:34,492 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:05:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 54064 backedges. 0 proven. 53824 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-09 06:05:35,195 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:06:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 54064 backedges. 0 proven. 53824 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-09 06:06:51,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429326559] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:06:51,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [404526480] [2024-11-09 06:06:51,930 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:06:51,930 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:06:51,930 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:06:51,930 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:06:51,930 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:06:52,100 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:06:57,661 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13922#(and (exists ((|v_ULTIMATE.start_main_#t~mem8#1_145| Int) (|v_ULTIMATE.start_main_~main__i~0#1_148| Int) (|v_ULTIMATE.start_main_~main__pos~0#1_27| Int)) (and (<= |v_ULTIMATE.start_main_~main__pos~0#1_27| 99999) (<= |v_ULTIMATE.start_main_#t~mem8#1_145| 2147483647) (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~main__pos~0#1_27|) (<= 0 (+ |v_ULTIMATE.start_main_#t~mem8#1_145| 2147483648)) (<= (+ |v_ULTIMATE.start_main_~main__pos~0#1_27| 1) |v_ULTIMATE.start_main_~main__i~0#1_148|) (<= 2 |ULTIMATE.start_main_~#main__a~0#1.base|))) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0))' at error location [2024-11-09 06:06:57,661 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:06:57,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:06:57,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [234, 234, 234] total 468 [2024-11-09 06:06:57,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714043856] [2024-11-09 06:06:57,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:06:57,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 469 states [2024-11-09 06:06:57,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:06:57,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 469 interpolants. [2024-11-09 06:06:57,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109773, Invalid=116327, Unknown=0, NotChecked=0, Total=226100 [2024-11-09 06:06:57,687 INFO L87 Difference]: Start difference. First operand 504 states and 505 transitions. Second operand has 469 states, 469 states have (on average 2.0106609808102345) internal successors, (943), 468 states have internal predecessors, (943), 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) [2024-11-09 06:07:06,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:07:06,355 INFO L93 Difference]: Finished difference Result 1010 states and 1245 transitions. [2024-11-09 06:07:06,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 468 states. [2024-11-09 06:07:06,357 INFO L78 Accepts]: Start accepts. Automaton has has 469 states, 469 states have (on average 2.0106609808102345) internal successors, (943), 468 states have internal predecessors, (943), 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 503 [2024-11-09 06:07:06,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:07:06,361 INFO L225 Difference]: With dead ends: 1010 [2024-11-09 06:07:06,361 INFO L226 Difference]: Without dead ends: 972 [2024-11-09 06:07:06,372 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1741 GetRequests, 1251 SyntacticMatches, 16 SemanticMatches, 474 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17046 ImplicationChecksByTransitivity, 106.1s TimeCoverageRelationStatistics Valid=109773, Invalid=116327, Unknown=0, NotChecked=0, Total=226100 [2024-11-09 06:07:06,372 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:07:06,373 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 44 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 06:07:06,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2024-11-09 06:07:06,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 972. [2024-11-09 06:07:06,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.0020597322348095) internal successors, (973), 971 states have internal predecessors, (973), 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) [2024-11-09 06:07:06,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 973 transitions. [2024-11-09 06:07:06,472 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 973 transitions. Word has length 503 [2024-11-09 06:07:06,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:07:06,473 INFO L471 AbstractCegarLoop]: Abstraction has 972 states and 973 transitions. [2024-11-09 06:07:06,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 469 states, 469 states have (on average 2.0106609808102345) internal successors, (943), 468 states have internal predecessors, (943), 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) [2024-11-09 06:07:06,474 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 973 transitions. [2024-11-09 06:07:06,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 972 [2024-11-09 06:07:06,505 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:07:06,505 INFO L215 NwaCegarLoop]: trace histogram [466, 466, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:07:06,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 06:07:06,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 06:07:06,709 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:07:06,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:07:06,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1474049700, now seen corresponding path program 11 times [2024-11-09 06:07:06,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:07:06,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445980978] [2024-11-09 06:07:06,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:06,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:07:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:10:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 217396 backedges. 0 proven. 217156 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-09 06:10:06,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:10:06,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445980978] [2024-11-09 06:10:06,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445980978] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:10:06,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634247367] [2024-11-09 06:10:06,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:10:06,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:10:06,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:10:06,382 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:10:06,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 06:10:07,929 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-09 06:10:07,929 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:10:07,934 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-09 06:10:07,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:10:08,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 11 [2024-11-09 06:10:30,986 INFO L349 Elim1Store]: treesize reduction 56, result has 53.7 percent of original size [2024-11-09 06:10:30,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 159 treesize of output 127 [2024-11-09 06:10:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 217396 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 217156 trivial. 0 not checked. [2024-11-09 06:10:32,839 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:10:52,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 209 [2024-11-09 06:10:52,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:10:52,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 224 treesize of output 166 [2024-11-09 06:10:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 217396 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 217156 trivial. 0 not checked. [2024-11-09 06:10:53,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634247367] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:10:53,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1750158283] [2024-11-09 06:10:53,239 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:10:53,239 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:10:53,240 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:10:53,240 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:10:53,240 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:10:53,484 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:11:05,810 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23198#(and (exists ((|v_ULTIMATE.start_main_#t~mem8#1_181| Int) (|v_ULTIMATE.start_main_~main__pos~0#1_29| Int) (|v_ULTIMATE.start_main_~main__i~0#1_185| Int)) (and (<= 0 |v_ULTIMATE.start_main_~main__pos~0#1_29|) (<= |v_ULTIMATE.start_main_~main__pos~0#1_29| 99999) (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_#t~mem8#1_181| 2147483647) (<= (+ |v_ULTIMATE.start_main_~main__pos~0#1_29| 1) |v_ULTIMATE.start_main_~main__i~0#1_185|) (<= 2 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= 0 (+ |v_ULTIMATE.start_main_#t~mem8#1_181| 2147483648)))) (= ~__return_60~0 0) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0))' at error location [2024-11-09 06:11:05,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:11:05,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:11:05,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [468, 35, 35] total 533 [2024-11-09 06:11:05,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895810343] [2024-11-09 06:11:05,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:11:05,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 533 states [2024-11-09 06:11:05,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:11:05,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 533 interpolants. [2024-11-09 06:11:05,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110624, Invalid=180436, Unknown=0, NotChecked=0, Total=291060 [2024-11-09 06:11:05,854 INFO L87 Difference]: Start difference. First operand 972 states and 973 transitions. Second operand has 533 states, 533 states have (on average 1.9043151969981238) internal successors, (1015), 533 states have internal predecessors, (1015), 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) [2024-11-09 06:11:58,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:11:58,245 INFO L93 Difference]: Finished difference Result 1046 states and 1064 transitions. [2024-11-09 06:11:58,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 532 states. [2024-11-09 06:11:58,246 INFO L78 Accepts]: Start accepts. Automaton has has 533 states, 533 states have (on average 1.9043151969981238) internal successors, (1015), 533 states have internal predecessors, (1015), 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 971 [2024-11-09 06:11:58,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:11:58,252 INFO L225 Difference]: With dead ends: 1046 [2024-11-09 06:11:58,252 INFO L226 Difference]: Without dead ends: 1007 [2024-11-09 06:11:58,273 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3411 GetRequests, 2823 SyntacticMatches, 18 SemanticMatches, 570 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45769 ImplicationChecksByTransitivity, 194.3s TimeCoverageRelationStatistics Valid=112168, Invalid=214444, Unknown=0, NotChecked=0, Total=326612 [2024-11-09 06:11:58,274 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 163 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 2513 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 2514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:11:58,274 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 175 Invalid, 2514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2513 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-09 06:11:58,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2024-11-09 06:11:58,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 1006. [2024-11-09 06:11:58,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 1.0019900497512437) internal successors, (1007), 1005 states have internal predecessors, (1007), 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) [2024-11-09 06:11:58,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1007 transitions. [2024-11-09 06:11:58,503 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1007 transitions. Word has length 971 [2024-11-09 06:11:58,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:11:58,504 INFO L471 AbstractCegarLoop]: Abstraction has 1006 states and 1007 transitions. [2024-11-09 06:11:58,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 533 states, 533 states have (on average 1.9043151969981238) internal successors, (1015), 533 states have internal predecessors, (1015), 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) [2024-11-09 06:11:58,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1007 transitions. [2024-11-09 06:11:58,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1006 [2024-11-09 06:11:58,515 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:11:58,516 INFO L215 NwaCegarLoop]: trace histogram [467, 467, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:11:58,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 06:11:58,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 06:11:58,717 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:11:58,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:11:58,717 INFO L85 PathProgramCache]: Analyzing trace with hash 922101137, now seen corresponding path program 12 times [2024-11-09 06:11:58,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:11:58,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980386339] [2024-11-09 06:11:58,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:11:58,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:12:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:15:04,699 INFO L134 CoverageAnalysis]: Checked inductivity of 219081 backedges. 0 proven. 218089 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2024-11-09 06:15:04,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:15:04,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980386339] [2024-11-09 06:15:04,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980386339] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:15:04,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069970642] [2024-11-09 06:15:04,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:15:04,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:15:04,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:15:04,702 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:15:04,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3b058c-f890-43db-8c38-daa579953d3b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 06:15:06,299 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:15:06,300 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:15:06,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 4889 conjuncts, 469 conjuncts are in the unsatisfiable core [2024-11-09 06:15:06,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:15:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 219081 backedges. 0 proven. 218089 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2024-11-09 06:15:07,825 INFO L311 TraceCheckSpWp]: Computing backward predicates...