./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_init7_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/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_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_init7_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/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_7d63af78-50a7-4888-82a5-98fd19b9a786/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 095ff128d46790285bc3a18356d3bb4884a680aceaaaa262887ebe8922b6a30f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:30:21,936 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:30:22,024 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:30:22,029 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:30:22,030 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:30:22,074 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:30:22,077 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:30:22,078 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:30:22,079 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:30:22,080 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:30:22,080 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:30:22,081 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:30:22,082 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:30:22,087 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:30:22,088 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:30:22,088 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:30:22,089 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:30:22,089 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:30:22,089 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:30:22,090 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:30:22,090 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:30:22,091 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:30:22,093 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:30:22,094 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:30:22,094 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:30:22,094 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:30:22,096 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:30:22,096 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:30:22,097 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:30:22,097 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:30:22,098 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:30:22,098 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:30:22,099 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:30:22,100 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:30:22,100 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:30:22,101 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:30:22,101 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:30:22,102 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:30:22,102 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:30:22,102 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:30:22,103 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:30:22,104 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:30:22,104 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:30:22,104 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:30:22,105 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:30:22,105 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:30:22,106 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:30:22,106 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_7d63af78-50a7-4888-82a5-98fd19b9a786/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 095ff128d46790285bc3a18356d3bb4884a680aceaaaa262887ebe8922b6a30f [2024-11-09 05:30:22,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:30:22,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:30:22,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:30:22,503 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:30:22,504 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:30:22,505 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-examples/standard_init7_ground-2.i Unable to find full path for "g++" [2024-11-09 05:30:24,810 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:30:25,075 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:30:25,075 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/sv-benchmarks/c/array-examples/standard_init7_ground-2.i [2024-11-09 05:30:25,083 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/data/f0f8e3acf/8ee417447e584c47b8e2d51c40f77124/FLAG5680ae13a [2024-11-09 05:30:25,101 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/data/f0f8e3acf/8ee417447e584c47b8e2d51c40f77124 [2024-11-09 05:30:25,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:30:25,107 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:30:25,109 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:30:25,109 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:30:25,117 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:30:25,118 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:30:25" (1/1) ... [2024-11-09 05:30:25,120 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53ff0b3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:30:25, skipping insertion in model container [2024-11-09 05:30:25,120 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:30:25" (1/1) ... [2024-11-09 05:30:25,150 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:30:25,406 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_7d63af78-50a7-4888-82a5-98fd19b9a786/sv-benchmarks/c/array-examples/standard_init7_ground-2.i[816,829] [2024-11-09 05:30:25,430 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:30:25,440 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:30:25,456 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_7d63af78-50a7-4888-82a5-98fd19b9a786/sv-benchmarks/c/array-examples/standard_init7_ground-2.i[816,829] [2024-11-09 05:30:25,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:30:25,496 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:30:25,497 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:30:25 WrapperNode [2024-11-09 05:30:25,497 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:30:25,499 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:30:25,499 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:30:25,500 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:30:25,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:30:25" (1/1) ... [2024-11-09 05:30:25,519 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:30:25" (1/1) ... [2024-11-09 05:30:25,540 INFO L138 Inliner]: procedures = 15, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 73 [2024-11-09 05:30:25,540 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:30:25,541 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:30:25,541 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:30:25,541 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:30:25,553 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:30:25" (1/1) ... [2024-11-09 05:30:25,553 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:30:25" (1/1) ... [2024-11-09 05:30:25,555 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:30:25" (1/1) ... [2024-11-09 05:30:25,556 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:30:25" (1/1) ... [2024-11-09 05:30:25,562 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:30:25" (1/1) ... [2024-11-09 05:30:25,567 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:30:25" (1/1) ... [2024-11-09 05:30:25,568 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:30:25" (1/1) ... [2024-11-09 05:30:25,569 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:30:25" (1/1) ... [2024-11-09 05:30:25,572 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:30:25,573 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:30:25,573 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:30:25,573 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:30:25,574 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:30:25" (1/1) ... [2024-11-09 05:30:25,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:30:25,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:30:25,612 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:30:25,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:30:25,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:30:25,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:30:25,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 05:30:25,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 05:30:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:30:25,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:30:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 05:30:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 05:30:25,756 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:30:25,759 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:30:26,000 INFO L? ?]: Removed 22 outVars from TransFormulas that were not future-live. [2024-11-09 05:30:26,000 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:30:26,033 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:30:26,033 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 05:30:26,034 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:30:26 BoogieIcfgContainer [2024-11-09 05:30:26,034 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:30:26,037 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:30:26,037 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:30:26,042 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:30:26,042 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:30:25" (1/3) ... [2024-11-09 05:30:26,043 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec49769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:30:26, skipping insertion in model container [2024-11-09 05:30:26,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:30:25" (2/3) ... [2024-11-09 05:30:26,047 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec49769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:30:26, skipping insertion in model container [2024-11-09 05:30:26,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:30:26" (3/3) ... [2024-11-09 05:30:26,049 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init7_ground-2.i [2024-11-09 05:30:26,075 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:30:26,075 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:30:26,177 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:30:26,186 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;@c569414, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:30:26,186 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:30:26,195 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 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 05:30:26,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 05:30:26,205 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:30:26,205 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:30:26,206 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:30:26,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:30:26,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1798552466, now seen corresponding path program 1 times [2024-11-09 05:30:26,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:30:26,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135478969] [2024-11-09 05:30:26,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:30:26,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:30:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:30:26,488 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 05:30:26,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:30:26,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135478969] [2024-11-09 05:30:26,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135478969] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:30:26,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:30:26,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:30:26,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501164334] [2024-11-09 05:30:26,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:30:26,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:30:26,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:30:26,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:30:26,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:30:26,536 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 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 6.333333333333333) internal successors, (19), 2 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 05:30:26,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:30:26,728 INFO L93 Difference]: Finished difference Result 71 states and 115 transitions. [2024-11-09 05:30:26,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:30:26,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 19 [2024-11-09 05:30:26,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:30:26,742 INFO L225 Difference]: With dead ends: 71 [2024-11-09 05:30:26,742 INFO L226 Difference]: Without dead ends: 42 [2024-11-09 05:30:26,746 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 05:30:26,753 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 7 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:30:26,757 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 38 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:30:26,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-09 05:30:26,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-09 05:30:26,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 states have internal predecessors, (56), 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 05:30:26,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 56 transitions. [2024-11-09 05:30:26,801 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 56 transitions. Word has length 19 [2024-11-09 05:30:26,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:30:26,802 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 56 transitions. [2024-11-09 05:30:26,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 05:30:26,803 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 56 transitions. [2024-11-09 05:30:26,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 05:30:26,804 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:30:26,804 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:30:26,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:30:26,805 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:30:26,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:30:26,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1753136881, now seen corresponding path program 1 times [2024-11-09 05:30:26,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:30:26,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900077281] [2024-11-09 05:30:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:30:26,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:30:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:30:27,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:30:27,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:30:27,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900077281] [2024-11-09 05:30:27,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900077281] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:30:27,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537957170] [2024-11-09 05:30:27,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:30:27,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:30:27,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:30:27,062 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:30:27,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:30:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:30:27,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:30:27,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:30:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:30:27,331 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:30:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:30:27,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537957170] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:30:27,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1002489648] [2024-11-09 05:30:27,439 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-09 05:30:27,439 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:30:27,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:30:27,451 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:30:27,451 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:30:28,280 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:30:28,445 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '387#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 48)) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 05:30:28,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:30:28,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:30:28,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-09 05:30:28,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057213766] [2024-11-09 05:30:28,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:30:28,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:30:28,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:30:28,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:30:28,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-09 05:30:28,450 INFO L87 Difference]: Start difference. First operand 42 states and 56 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 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 05:30:28,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:30:28,720 INFO L93 Difference]: Finished difference Result 114 states and 175 transitions. [2024-11-09 05:30:28,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:30:28,721 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 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 33 [2024-11-09 05:30:28,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:30:28,722 INFO L225 Difference]: With dead ends: 114 [2024-11-09 05:30:28,722 INFO L226 Difference]: Without dead ends: 77 [2024-11-09 05:30:28,723 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-09 05:30:28,724 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:30:28,725 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 48 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:30:28,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-09 05:30:28,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-11-09 05:30:28,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.105263157894737) internal successors, (84), 76 states have internal predecessors, (84), 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 05:30:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2024-11-09 05:30:28,735 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 33 [2024-11-09 05:30:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:30:28,736 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2024-11-09 05:30:28,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 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 05:30:28,736 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2024-11-09 05:30:28,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-09 05:30:28,738 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:30:28,738 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:30:28,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:30:28,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:30:28,939 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:30:28,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:30:28,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1428576518, now seen corresponding path program 2 times [2024-11-09 05:30:28,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:30:28,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862042658] [2024-11-09 05:30:28,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:30:28,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:30:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:30:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-11-09 05:30:29,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:30:29,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862042658] [2024-11-09 05:30:29,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862042658] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:30:29,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72616325] [2024-11-09 05:30:29,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:30:29,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:30:29,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:30:29,339 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:30:29,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:30:29,705 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 05:30:29,705 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:30:29,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 05:30:29,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:30:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-11-09 05:30:29,754 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:30:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-11-09 05:30:29,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72616325] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:30:29,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1617310615] [2024-11-09 05:30:29,858 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-09 05:30:29,858 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:30:29,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:30:29,859 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:30:29,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:30:30,405 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:30:30,640 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1127#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 48)) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 05:30:30,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:30:30,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:30:30,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2024-11-09 05:30:30,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056060946] [2024-11-09 05:30:30,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:30:30,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 05:30:30,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:30:30,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 05:30:30,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2024-11-09 05:30:30,647 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 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 05:30:31,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:30:31,131 INFO L93 Difference]: Finished difference Result 228 states and 283 transitions. [2024-11-09 05:30:31,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 05:30:31,131 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 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 75 [2024-11-09 05:30:31,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:30:31,133 INFO L225 Difference]: With dead ends: 228 [2024-11-09 05:30:31,133 INFO L226 Difference]: Without dead ends: 161 [2024-11-09 05:30:31,135 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2024-11-09 05:30:31,136 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 102 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:30:31,137 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 41 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:30:31,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-09 05:30:31,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2024-11-09 05:30:31,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.05) internal successors, (168), 160 states have internal predecessors, (168), 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 05:30:31,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 168 transitions. [2024-11-09 05:30:31,165 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 168 transitions. Word has length 75 [2024-11-09 05:30:31,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:30:31,165 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 168 transitions. [2024-11-09 05:30:31,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 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 05:30:31,166 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 168 transitions. [2024-11-09 05:30:31,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-09 05:30:31,173 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:30:31,173 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:30:31,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:30:31,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:30:31,375 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:30:31,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:30:31,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1082395316, now seen corresponding path program 3 times [2024-11-09 05:30:31,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:30:31,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300370506] [2024-11-09 05:30:31,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:30:31,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:30:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:30:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2024-11-09 05:30:32,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:30:32,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300370506] [2024-11-09 05:30:32,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300370506] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:30:32,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384862886] [2024-11-09 05:30:32,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:30:32,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:30:32,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:30:32,314 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:30:32,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:30:32,579 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:30:32,579 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:30:32,586 INFO L255 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 05:30:32,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:30:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2024-11-09 05:30:32,674 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:30:33,040 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2024-11-09 05:30:33,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384862886] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:30:33,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1461013583] [2024-11-09 05:30:33,046 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-09 05:30:33,047 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:30:33,047 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:30:33,047 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:30:33,048 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:30:33,531 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:30:33,802 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2683#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 48)) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 05:30:33,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:30:33,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:30:33,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-11-09 05:30:33,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925299681] [2024-11-09 05:30:33,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:30:33,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 05:30:33,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:30:33,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 05:30:33,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2024-11-09 05:30:33,807 INFO L87 Difference]: Start difference. First operand 161 states and 168 transitions. Second operand has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 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 05:30:34,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:30:34,900 INFO L93 Difference]: Finished difference Result 468 states and 565 transitions. [2024-11-09 05:30:34,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 05:30:34,901 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 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 159 [2024-11-09 05:30:34,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:30:34,904 INFO L225 Difference]: With dead ends: 468 [2024-11-09 05:30:34,904 INFO L226 Difference]: Without dead ends: 329 [2024-11-09 05:30:34,905 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2024-11-09 05:30:34,907 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 416 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:30:34,907 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 41 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 05:30:34,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2024-11-09 05:30:34,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2024-11-09 05:30:34,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.024390243902439) internal successors, (336), 328 states have internal predecessors, (336), 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 05:30:34,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 336 transitions. [2024-11-09 05:30:34,935 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 336 transitions. Word has length 159 [2024-11-09 05:30:34,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:30:34,936 INFO L471 AbstractCegarLoop]: Abstraction has 329 states and 336 transitions. [2024-11-09 05:30:34,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 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 05:30:34,936 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 336 transitions. [2024-11-09 05:30:34,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2024-11-09 05:30:34,941 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:30:34,942 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:30:34,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 05:30:35,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:30:35,146 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:30:35,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:30:35,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1115704048, now seen corresponding path program 4 times [2024-11-09 05:30:35,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:30:35,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031835292] [2024-11-09 05:30:35,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:30:35,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:30:35,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:30:37,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3388 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2904 trivial. 0 not checked. [2024-11-09 05:30:37,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:30:37,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031835292] [2024-11-09 05:30:37,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031835292] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:30:37,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900892738] [2024-11-09 05:30:37,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:30:37,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:30:37,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:30:37,875 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:30:37,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:30:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:30:38,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 1295 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 05:30:38,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:30:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3388 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2904 trivial. 0 not checked. [2024-11-09 05:30:38,477 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:30:39,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3388 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2904 trivial. 0 not checked. [2024-11-09 05:30:39,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900892738] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:30:39,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1871048681] [2024-11-09 05:30:39,680 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-09 05:30:39,680 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:30:39,681 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:30:39,681 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:30:39,681 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:30:40,029 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:30:40,308 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5883#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 48)) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 05:30:40,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:30:40,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:30:40,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2024-11-09 05:30:40,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731570394] [2024-11-09 05:30:40,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:30:40,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-09 05:30:40,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:30:40,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-09 05:30:40,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1202, Invalid=1878, Unknown=0, NotChecked=0, Total=3080 [2024-11-09 05:30:40,315 INFO L87 Difference]: Start difference. First operand 329 states and 336 transitions. Second operand has 49 states, 49 states have (on average 2.5306122448979593) internal successors, (124), 48 states have internal predecessors, (124), 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 05:30:42,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:30:42,671 INFO L93 Difference]: Finished difference Result 948 states and 1129 transitions. [2024-11-09 05:30:42,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-09 05:30:42,672 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.5306122448979593) internal successors, (124), 48 states have internal predecessors, (124), 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 327 [2024-11-09 05:30:42,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:30:42,676 INFO L225 Difference]: With dead ends: 948 [2024-11-09 05:30:42,676 INFO L226 Difference]: Without dead ends: 665 [2024-11-09 05:30:42,679 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1003 GetRequests, 949 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1202, Invalid=1878, Unknown=0, NotChecked=0, Total=3080 [2024-11-09 05:30:42,681 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 818 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 968 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 968 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:30:42,681 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 62 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [968 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-09 05:30:42,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2024-11-09 05:30:42,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2024-11-09 05:30:42,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 1.0120481927710843) internal successors, (672), 664 states have internal predecessors, (672), 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 05:30:42,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 672 transitions. [2024-11-09 05:30:42,729 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 672 transitions. Word has length 327 [2024-11-09 05:30:42,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:30:42,730 INFO L471 AbstractCegarLoop]: Abstraction has 665 states and 672 transitions. [2024-11-09 05:30:42,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.5306122448979593) internal successors, (124), 48 states have internal predecessors, (124), 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 05:30:42,730 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 672 transitions. [2024-11-09 05:30:42,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2024-11-09 05:30:42,766 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:30:42,767 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:30:42,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:30:42,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:30:42,971 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:30:42,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:30:42,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1168778696, now seen corresponding path program 5 times [2024-11-09 05:30:42,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:30:42,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324448793] [2024-11-09 05:30:42,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:30:42,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:30:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:30:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 14812 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 12696 trivial. 0 not checked. [2024-11-09 05:30:50,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:30:50,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324448793] [2024-11-09 05:30:50,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324448793] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:30:50,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388903227] [2024-11-09 05:30:50,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:30:50,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:30:50,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:30:50,031 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:30:50,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d63af78-50a7-4888-82a5-98fd19b9a786/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process